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 0xa39121d092a79b8ead84da28543309d2bfea19026137cb295b1ccf2199ac650c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a3c4a982-0dcf-4b0a-afc9-ee7f3f405870.json and https://artists.proofprofile.net/proofs/artist/a3c4a982-0dcf-4b0a-afc9-ee7f3f405870.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x09dd97cc2c230b1f9dd0b093077526a91cbae356c2dca7ef58538670920cab28. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM12006139.
Cantique de Noël (Minuit, Chrétiens) / O Holy Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9183e11f87c2595db374e5d4df73b35686932fd1dc9f4f33f9ab40b7882dee7c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM12006136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6134103cf7a4e56e518cbf12255771a639b766b1d1c7ef5b9027509b807a1a5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM12006113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054a0aa81528cf5997ee820f265ab0c2beb92e18a2d304acc151345486da002e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM12006143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bceebe12f5ff3b970abceadbce742dd8ce337df22695900b9429cf953cfc9df. 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/USSM12006129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9edcbba5284be3e3cd8a1b000c0beaeb66be1b799f4c76eeeaed81242c592c73. 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/USSM12006115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae58592e8a4f5844180608878b1d89ceb83107fc5e9b139f896b8f2888857ecb. 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/USSM12006137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50d9f57e1eccd7aaa7b01133ebd1dec7201074095d1bbe824e23088978b9f7d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM12006118.
Ich steh an deiner Krippen hier, BWV 469
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8683b5707b42d893ec8d0e8e730221238bffeed7efd245aff45f6fc39f08fcce. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM12006123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe850fa7beb5819155cc789e82c513d3b330471c88f09a183953c20d97f4c3ba6. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USSM12006147.
Eine italienische Nacht - Live aus der Waldbühne Berlin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc72c86c28e8c7b8e0c274b75e98d5879c1d670f99cd7f13e264b92c65ab00f6b. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11806989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdfd623f6beef4aa56f4c801ba7a2a127f7bd204d1f44988171fcee9486bea15. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM11806991.
Cavalleria rusticana: Ah! Lo vedi, che hai tu detto?
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x933be03275e25bfe04a314a4ec2024482dd6d40440572d67c3ed9016486ade87. 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/USSM11806992.
Cavalleria rusticana: Mamma, quel vino è generoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44eff5013759945112ab43c1637e48d4e73121948e815172d45d026b6f2fe667. 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/USSM11806993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1b9a4e4e2901f421a80004ae099bd32e82a0ea1187bdaa08d0092e5d1ed53e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM11806995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e87ab561030b4e80aead7d9d60897fd6b96ed0bab09354bfdbb5a1f075c3e8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USSM11806999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4141545457bc2c1f60db14a9968e60a04f477516267091395736cfdd3cd6bc60. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM11807000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535bcc5269340d8085cab9bed3a34c1dd5231f1a40bb561daf8f1d7efeb35b76. 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/USSM11807001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff28c55b86aad1c2ad765f73ecc9a71ea1fcb3f9756dc8c4ed2235bbf992e270. 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/USSM11807002.
Parla più piano (Theme from "The Godfather")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c17faa8f4940f5f6a9963fe86bedabdfa9076d2d8d4081f43f470c47985fb1f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USSM11807003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x944af8d4669f34a2f8d0960e508ed20ef773cb84a43cbb0f7b9eb89203f125a5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USSM11807006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19845617ed0edc0c0de6706a76dfe4e380336356aaeccba0f3d7a0d4bfcc7253. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEN962336301.
Symphony No. 3 "Symphony of Sorrowful Songs": IIa. Lento e Largo – Tranquillissimo "Mamo, nie płacz, nie"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478438b8a1aefb4ed86fa69973a9e1bd3426860f038a15ff38a6334d1df3fa00. Chain 2 (Bitcoin): anchored in block 958042 (2026-07-14T18:24:07Z), 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/DEN962336302.
Hänsel und Gretel: Abends will ich schlafen gehn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8345c54835f3376d8a19c9f5abe5395d513223db98c7aae50dada1c9cae5bdb9. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/DEN962336305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef155c827f57220911dae79af723b22e230cb7f2da1df5ad97bf8bce425937. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN962336308.
Otello: Oh Dio! Qual mal strepito è questo!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce33b17bdcb7fc4ea0f1bb47f7dbe4a108b2fce37d95b82933e18cdd48d537e. 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/DEN962336309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83baf7b51a7e91ca6670ebdb442b371795448e35f501693a084583b09abbb4c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN962336311.
Le Cid: Plus de tourments et plus de peine
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a434be68abc2728dfd9b4728bccf15845fe4fab8901892f2ec0d4ac6399d78. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN962336315.
Ave Maria sur la Méditation de Thaïs: Andante religioso "Ave Maria, gratia plena" (Arr. Spindler for Soprano, Choir and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e09da04cc715fc7376677a4642cf31444eae609c6db9078b08edff29c9b0d9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEN962336317.
Ave Maria sur la Méditation de Thaïs: A tempo "Ave Maria, gratia plena" (Arr. Spindler for Soprano, Choir, Violin Solo and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2e1cb76bb78f293e3b56a846bd2b96cc4d097ba203829df36313f9aa937228. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN962336318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b91370526bb7ddb0b89c7167f14561937ec23143f834c066766026ccdaec85f. 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/DEN962336319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d8b6e1e87e15edc1924b31c51536e5a0dad520c6ac003f2bea22f7bacaa0a2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEN962336321.
Lakmé / Flower Duet: Viens, Mallika, les lianes en fleurs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87659e81a609f99429757c63064d04feb85a5a9a903c3a3322b9de1bedcb651. 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/DEN962336322.
Lakmé / Flower Duet: Dôme épais le jasmin ... Sous le dôme épais
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f19040f378190e5354ab8aa653d1558bbcf0dcc9df5b83bc0562e53d76a01f9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DEN962336323.
Massenet: Ave Maria sur la Méditation de Thaïs: Andante religioso "Ave Maria, gratia plena" (Arr. Spindler for Soprano, Choir and Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e09da04cc715fc7376677a4642cf31444eae609c6db9078b08edff29c9b0d9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEN962336317.