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 0x80f30f82b6605019b19fefdb507044eb298f5185907e3c7a19c0a1d8266bdb30. Chain 2 (Bitcoin): anchored in block 954618 (2026-06-20T23:05:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7b5003d-0b5d-4fff-aa47-b91703b49ac5.json and https://artists.proofprofile.net/proofs/artist/c7b5003d-0b5d-4fff-aa47-b91703b49ac5.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Complete New English Hymnal, Vol. 20
Winchester New "On Jordan's Bank the Baptist's Cry" (Arr. W.H. Havergal for Choir & Organ)
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 0x569259d37ecdb80c3f1720045d27503ba265c36b79906a757447bfa465b704e1. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBXUX0872001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085b0139f89cebc21814243e50deee85f36f7fe726b3d40ea9672605211a9919. 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/GBXUX0872006.
Gute Bäume Bringen "Christian, Dost Thou See Them"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846d4b602ced4e8bb36221d50ffe1d98cb450ebc3cabf0ffe5cfb6606d16d87c. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/GBXUX0872008.
St. Thomas "Now, My Soul, Thy Voice Upraising"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0a945a5b4ea096b279e5fb19b5c3df457e99d402a95228fd8981776e186073. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBXUX0872010.
Iste confessor "Only-Begotten, Word of God Eternal"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931746ca8267641ae2927f0764f6b2385418e00279e33032a03d0a7d77768301. 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/GBXUX0872012.
Slane "Be Thou My Vision" (Arr. E. Routley for Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff5677ef3cde56db44ab08d8d043dad4aadbd5e44a4516d0acb35eed70bc1575. 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/GBXUX0872020.
Ellers "Saviour, Again to Thy Dear Name"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f324fcacd2e08ce01fa3d15198f56a14f5ad13cf8cfd87f4e4b94ba26df8b30. 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/GBXUX0872022.
Lord of the Dance (After J. Brackett's Simple Gifts) [Arr. C. Dearnley for Choir & Organ]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa8fa01a6e349571c8b3b14197cd547a0779f0724a9a6aebe2a39b75e6c54c9. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/GBXUX0872025.