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 0x3af64aafc34135d29f63481d9dde9e3c592b767fcf65b2cabd441d7ef27a2298. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f4d1ee05-e0e0-4ad4-89a9-eeeff8d73936.json and https://artists.proofprofile.net/proofs/artist/f4d1ee05-e0e0-4ad4-89a9-eeeff8d73936.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Fantasy on Themes from Verdi's La traviata for Clarinet and Piano, Op. 45
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 0x33d6277ec30bb565a09bfb9b047069f39a56ae213adf36c32f8e71b323b01d7c. 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/ATMA40506432.
Alt-Wiener Tanzweisen: No. 3, Schön Rosmarin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f8d31027c7d6a29330899f7c4d542799ea0e451e090d062af7054241b7b4f1. 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/DES380835002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x840acca29760efdb7abd6983e694ab17b331a830d8e0757aab7c27967cc69979. 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/DES380835003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f67b64fdca99f78079acc557a1d05267851ea4f79f90fbb4e68315af81b442. 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/DES380835005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d356feb055174adde073474d6a7ca2591532529b7b513f50c57ce762e9f98d. 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/DES380835006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984312442293c22c48699785a423a463156148706d684b442b5231ade05d7768. 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/DES380835008.
Scaramouche, Op. 156b: No. 3, Brazileira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa74efb781dc7667d27833fb23d57e5b738e8c8d2dc46cc0a4aaa8e89f8709191. 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/DES380835009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x984d1186a273a2fb1897610c72c372196fafa3af2eab04289551c66210f80de3. 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/DES380835010.
Alt-Wiener Tanzweisen: No. 2, Liebesleid
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe11a796777c154c61da1185c101aaa323865f9a1edd95f098ebfd4ee4ab02f6. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DES380835011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bd4acb8f947e3b2d55c78360c6907c35cfb53c81a1f506974e797a932f8c1d. 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/DES380835012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0793805d23b39856bc44927a6729656882869fb0e343281e5fafb9c64322ea. 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/DES380835013.
Souvenir d'un lieu cher, Op. 42: No. 3, Mélodie in E-Flat Major
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4e8ddf10a5bdb97ddbc61bed30c316643c1d5621e8911ffccd5a19aac092a8. 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/DES380835015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141b6b42d0230b5514e85e1c6c99a08613d8a6607224607a73d9831674b4b11e. 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/DES380835020.
Die virtuose Klarinette in der Promenadenmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8ae087885eb29e223fa5eaddaef078f318b0065eac102ee22ce7ebc8d5591. 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/FRX761504345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7547dc7ea30e73553c2a7ebfbc2669d58e7bf4d7ac8519190fdfa2e305ef6af7. 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/GBAJU1600832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93df065f96695c9fc96cd8dc0649d6af054da441c602f284767456c5cf669ef0. 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/GBAJU1600833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a999a41bb8407a0a177dbb50d0afbee91db8fb4fb01e5d9dfaf57b4e023a33a. 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/GBAJU1600844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x813bdc72d8886e43010f22ef37f14a10d5b7ad2a75ad6de720fd983fcf6a2636. 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/GBAJU1600845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3757333ccbb4761400917f212304b9d4991daf402f82d07b748501e5eca71c1. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBAJU1600849.
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
Fantasia pour Clarinette et Piano, Op. 83
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1817bda85cd322a954f7a3b5d67f1af5ca0227c734de8119c574dc4c181fe4cc. 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/FRZ140013010.
Introduction, Thème et Variations pour Clarinette et Quatuor à Cordes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab604bb51cf736cad923075f770bf250992a1089319deb7bcb51efb64decd1df. 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/FRZ140013020.
Paraphrase pour Clarinette, Clarinette Piccolo et Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb47780c17e76d6bc8b867468cbb49af27b68552fe337966506aa9857750f0c1a. 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/FRZ140013040.
Fantasia di Concerto pour Clarinette et Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9f09825d7c166be4a6c56b535da8075b4dc1b2dab255f7cba1b8a71951d8a93. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FRZ140013050.
Andante & Variations in D Major, WoO 44b (Arr. M. Mumulides for Clarinet & String Orchestra)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04ea0fc8a7fc21933bc5c88a48fbde1e3db89282b264ba4698edbd3f29f51046. 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/QMEU31501997.
Louis Cahuzac: L'œuvre pour la clarinette
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2968adc74c11afd500a3bf37b3ff1d5f5f09a498af1c58fc1fdc82256bd7d12. 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/FR10S1548002.