1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d134779ea8ca8693e3339edaf1d047becaa3a36b2c96db64bc8c8b2e37fa67. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b4fc24f0-abe1-4ff1-a454-dd869caacfbf.json and https://artists.proofprofile.net/proofs/artist/b4fc24f0-abe1-4ff1-a454-dd869caacfbf.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Piano Music for Classical Ballet Class Volume 1
Piano Music for Classical Ballet Class, Vol. 1
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09cf990b919673a120706d11558158dcdf508a8b45d3955258a842c979df6b5. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2002c27cf03986142bb97a0e701d112c6c29e7dbd225134223ad5849fc8475. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41dbedb08ebaedcaeccb1959b386f74b36e3a7d7d3579dc47b859906b250d1a. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:13:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4862f67819aec4258d2d0aaaddebae72c75f0f0809f5f8713478b2b967248416. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T22:58:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83ab0b93fa45f898515a102ff754d32847117d820deec57967a99e1c4a6b120. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099e8fd9781620801e0a4cdcddc8a7098f13fb8c41850635e1d55531aae224bd. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:03:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17becb92df2c057a0e978682c7817a8fbb1d787051f84f2879e63e8f58f5774. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1442829.
Prelude in B Minor, BWV 855a (Arr. By Alexander Siloti)
Piano Music for Classical Ballet Class, Vol. 2
Piano Music for Classical Ballet Class, Vol. 3
Piano Music for Classical Ballet Class, Vol. 4
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06313b195109af2906de332324073b91d76ded9ab19613f8320c35b7fc95b6f3. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81618404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda269533f815b61b67da39320159ef586b4869c3a2bf1e69dea8e0183b568314. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:25:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81618406.
La Bayadère, Act III: Les Ombre (Stretch)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769067d87778f27e0979175c36d35676ffdaa113f5d7d6fc8aea4bddf6ce7d8d. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:11:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81618426.
Christmas Piano Music for Classical Ballet Class, Vol. 1
The Nutcracker, Op. 71, Act II: Dance of Mirlitons (Petit Battement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b850b507f282596fcfbb83dffb9d501ccc9abf3e70178b52a41d9506c0135ed. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41790491.
Fairy Tale Music for Classical Ballet, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb381a0a951bb67d7d78f74d840e1b35daeb24ccbd11da30d9f948e5815cb2c9. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:43:24Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41794890.
Reindeer(s) Are Better Than People (Pirouettes 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2c301d6fbd0b032deb111dd7794625cb2ae5d16807296829a4010696574d27. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41794892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8006f891da0967550576b40744b61deb429f4aaf67d1eec73ede8c75e24fa72d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41794893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2f24112258b79293060742390f72fdd5b6765758c99b8e59fb9fcd2083eedd. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41794895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b93c525945bdd8434f4141f770c031bd9221ec1775920b40f095ed3afc63cd3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY41794899.
Piano Music for Children's Classical Ballet Class, Vol. 1
Minuet in G Major, BWV Anh. 114 (Plié 1)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3234669ee5d6eb08e1f28284522bb01fb6eac1c0128bcfd4b55fd22ab5ad31f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1877417.
Flames of Paris, Act IV: Variation (Chaînés or Piqué)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9afc3864b80cc175694812bccb80f0d88b8a8d5db751f97dbd9efafd9c6a931. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1877431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e876d30efb716421eeb08eb06eab0eb8ea1aa8301e27e408b15d0533e42d87. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:12:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGH1877437.
Piano Music for Children's Classical Ballet Recital, Vol. 1: Les Millions d'Arléquin and La Fille du Pharaon
Christmas Piano Music for Classical Ballet Class, Vol. 2
Piano Music for Classical Ballet Class, Vol. 5
Esmeralda, Act 2: Esmeralda’s Variation (Grand Battement)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x380955bda36e47b0ec64b03c2d99e7b1bbfdfef6be9662ca71bb7c905379c61a. Chain 2 (Bitcoin): anchored in block 958417 (2026-07-17T12:56:50Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM21941713.
Piano Music for Children's Classical Ballet Class, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x829689d3917ca64fa02d2e75b64e3ba625d66cfcbf70f0bb5478cf666421f06f. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17043934aa5515e48c13078119256ce7781931399b47749aa04a3ef4768fb395. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb8da88c02a6fa7ad3cbf76a2c665a25ca2f7110ef124237892bbc037db7e1d. Chain 2 (Bitcoin): anchored in block 957863 (2026-07-13T14:41:15Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22bbdb37954dc2a12c2edfbcb7a69507e7233a8dee7556fc3e51d27a3f361f6c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901026.
Carmen, Act 1: L'amour est un oiseau rebelle "Habanera" (Tendu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a3acb5adcdaa39e063893f7430e08fc73411e0d188ecf775009a82cc63fdd8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd933d0bba24856838f3ce3ca6b0f699d9d76f026143d9e5c2ac8b665a58c0d70. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc64fcceaf68b5fb48312b8a5b162cddadacbb4ccba523d88b4d43104b17aaae. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb386a7351645fd1977078edbe2b9221b0593d080fe5ddb9f1353e3896dfbbcf. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ab2f2f2669f0d8ecf42c0135cf98fed45d1a28982ca2c15bf0668f2f984d8. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:08:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef7163848b6a3c3962e56537c6e0deeabdee26ef76bbafe61c4fb640e2e7d9cb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM91901040.
Piano Music for Classical Ballet and Character Dance Class, Vol. 1
Fairy Tale Music for Classical Ballet, Vol. 2
All in the Golden Afternoon (Fast Tendu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97cbcf7fefddd2fd86819ced8a5a2e2645dbc91507d3319b89da0b6a7fdc5065. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM82283359.
Piano Music for Classical Ballet Variations: Sleeping Beauty and Paquita
Piano Music For Classical Ballet Class: Familiar Tunes, Vol. 1
I Can't Give You Anything but Love, Baby (Warm Up)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d217f2c0256b29ef5b23c9312ddd7befd1ffe25aa1aed8d9d26af4ad09fc06. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x999f161bc8eabbb3091c7d81d2d14419fbd032668a1039d81eda252fe6db4c80. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd48ced330b96f74db7f14ef015d362091d10570f217b194bf061551d000c29d0. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfceffe41043c4a3c485371f7dd9c30dc38e587ce62ded8154bedece266a6267e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335348.
Ac-Cent-Tchu-Ate the Positive (Fast Tendu)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81b25900a4ac2b587a1e235e1d22be6d4073bc39df68471e5c022eee8e5a9594. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:20:18Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafdf519be3f1ae4fa7fa74a263c954e33054abb2e3c1832e67cbb4e4432327b. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335351.
The Umbrellas of Cherbourg: I Will Wait for You (Rond de jambe)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7adc0a175dd61d63a08eb8de5d8ba2d7b3c8867552fedc1523f4f98e8693c79. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:18:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USMH92335352.
Piano Music for Classical Ballet Class, Vol. 6
Les Millions d'Arlequin, Act I: Scène VI, Variation de Colombine (Extended Ending)
R. Drigo: Les Millions d'Arlequin: Piano Score for Classical Ballet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b70cc1863cec8c69c1833babed59cad96569e2c836381b1116368711b300161. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81771263.
Les Millions d'Arlequin, Act II: Scène I, No. 9, Polonaise
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc65f23228c616be878f31b4db2d0b883d837daed6a62c354bb27f76620e79efe. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM81771269.
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch