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 0x3cd3c54af4579bcb65a813fd53900deeba7b05cab1661782aa197097de2516b1. Chain 2 (Bitcoin): anchored in block 954573 (2026-06-20T15:45:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5e35328-388a-4ed1-b3af-eee424a38204.json and https://artists.proofprofile.net/proofs/artist/b5e35328-388a-4ed1-b3af-eee424a38204.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
St. John Passion, Part I: Sing, My Tongue, the Glorious Battle
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 0x20de573a4faaba6b6e3278261715623577e20c979c3502f33427a266a34090a6. 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/GBLLH1541201.
St. John Passion, Part I: Hymn: It Is A Thing Most Wonderful
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa707a5708d469fd659db45dfc2a5d931849a56fca65b2418c2407507b782f887. 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/GBLLH1541203.
St. John Passion, Part I: Peter’s Denial
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4be587fa914530441de109e0ab8c97c72af74f741c543093565802b28e25578. 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/GBLLH1541204.
St. John Passion, Part I: Miserere, My Maker
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd344c50dea69f346272c11ef2563309a6a8317fe2299a0826304b8e23617ed21. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLLH1541205.
St. John Passion, Part I: Hymn - Drop, Drop Slow Tears
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2528afe97115c51d5aefc98f881a3d5eec5c52fcc09a733cb335ea2a14249b69. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/GBLLH1541206.
St. John Passion, Part II: The Judgement Hall (I)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823cc8827aa5d123a448ec82dcf0f349e966f183072eef64d901a735ada5e20e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLLH1541207.
St. John Passion, Part II: Hymn - Jesu, Grant Me This, I Pray
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3e8c1bc64d734ded0b0f6ebbb603ef7c766ae504db5a4facd7015956a497d4e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBLLH1541208.
St. John Passion, Part II: The Judgement Hall (II)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887e3fa14fb388a513970b707417ed231c05fe575ce125e88b10edec1b3887ea. 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/GBLLH1541210.
St. John Passion, Part III: Jesus is Crucified
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fee9e5466851bf4a16957aec495dd7808ed2f83fc0286bd5e51b6eae99ae1f. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/GBLLH1541212.
St. John Passion, Part III: Hymn: There is a Green Hill Far Away
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127798fbe64526e5c686bfe1e4f4f037ea56177ce816983463052df83971107e. 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/GBLLH1541213.
St. John Passion, Part III: The Crucifixion
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad147f03a9278ce5b7339742df56599f9b2a2564a839db99aa53d859f5589280. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GBLLH1541214.
St. John Passion, Part III: Jesus, My Leman
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa91afed420a7cfd5362ac1286348f416183dce130e0f795a59c1dcf11109ba8. 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/GBLLH1541215.
St. John Passion, Part III: When I Survey the Wondrous Cross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d49dfe7a3a1a0d3f06346effd85ec05a912c5fae00f157735acda19e043d00. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/GBLLH1541217.