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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65828e959d04afc6a49587d8b7c0a3b1e90c2911e216e1bdd6764048a6685c6a. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f4051cf-b289-4789-bac2-c5f91b56a0e7.json and https://artists.proofprofile.net/proofs/artist/6f4051cf-b289-4789-bac2-c5f91b56a0e7.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
Vivaldi: Gloria In D Major; Bach: Magnificat In E Flat Major
Gloria in D Major, RV589: 1. Gloria in excelsis
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359c6a38072e19bee471672b7932b79369a5f8166fbcbf25d56c19c8ac7dd64b. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740201 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf12e1d785ac4f30510fcadf37c7afaf91d406f154cf07d960afb6121297d943. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740202 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe47877a4cc83f40b26a9e1837c17c89f1afa15203343ae2ad69209ccec27ef96. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740203 — a six-check JSON result.
Gloria in D, R.589: 4. Gratias agimus tibi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c920fe477e404778159454586a33add7f8fe85918e75fb16a0e0518a992e9e. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740204 — a six-check JSON result.
Gloria in D, R.589: 5. Propter magnum gloriam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20ffc61fe288aee6e895dca65f2ebf285f666ae82da87160ded57bd9f687597. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740205 — a six-check JSON result.
Gloria in D, R.589: 6. Domine Deus, Rex Coelestis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3e94b37ba9fcda6e1431a40244a04ef39d7f95436a0b4bbfe5f10921725414. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740206 — a six-check JSON result.
Gloria in D, R.589: 7. Domini fili unigenite
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2330cd99e4e2b9af3a1cbfca2ab1480930967156ef1756cb14bb47a42397a8f0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740207 — a six-check JSON result.
Gloria in D, R.589: 8. Domine Deus, Agnus Dei
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239711e7f05dbbd66d56e626ece5cec04acb0003bc439f22e6f4c1b3ba2ae47f. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740208 — a six-check JSON result.
Gloria in D, R.589: 9. Qui tollis peccata mundi
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5456b305636445ebca028e9b1704c8cfa58cf220a27966fcc8a1bdb9d79c9666. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740209 — a six-check JSON result.
Gloria in D, R.589: 10. Qui sedes ad dexteram patris
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834779c4a064d8880118a73bb11aeb0afb9d6644c583a741d843fd797f3e7c0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740210 — a six-check JSON result.
Gloria in D, R.589: 11. Quoniam tu solus sanctus
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421d61cfc280522a65db72d3851c3f11b336f1626be8f5e8a4ce0a90c85cfe04. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740211 — a six-check JSON result.
Gloria in D, R.589: 12. Cum Sancto Spiritu
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e09f52b29541aad5284611deab456beb3167e73a9a2618004525d63cb197e0. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077740212 — a six-check JSON result.
Magnificat In E-Flat Major, BWV 243a: 1. Magnificat anima mea
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a0f7beff141fc4322ec010e7f70a633901c78cc5c7a0deb694b0f3695c758f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077840101 — a six-check JSON result.
Magnificat In E-Flat Major, BWV 243a: 8. Et misericordia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ebda58974a74712e00b1e4f4e1bab6e775a1d6d24d07f2a2907503fc6935cd. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077840108 — a six-check JSON result.
"Utrecht" Te Deum, HWV 278: Vouchsafe, O Lord
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e4b5c9c10241ecb0b2a58f93c43399d6b56d56e3cbc3f27f7ff88959df38e68. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077900487 — a six-check JSON result.
"Utrecht" Te Deum, HWV 278: When thou took'st upon thee... When thou hadst overcome Thou sittest at the right hand of God
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf039e838d4b708f07f903172bd7233465e6b3e61327c201315868bbbca5211f. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBF077900484 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad0e971f40dc38306ca2d419ee516f1a7dbf7d700c935e7a26532f3a5317090. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502530 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6491a1a672daf237e5fa0969a16c2134c9870fd5dbe3323596966c506aa5d1a2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502680 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a23c6c8905cf0b60de6601c2ff6fd5f45d2518bb78c5e0da51255d2768225d. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502400 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f26292cc07ad68b696f13ddc5862cac3247b7ea8f515d4af007f66117e62af. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502440 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b09fb5330dffc39df57a3064dcf01bc16dcdc083f5574069537927dd79cf174. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502450 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953517f6c30ab876086f96126164ca3d850d404f6fec5a5f75e6121e20ffa33d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEF057502550 — a six-check JSON result.