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 0xd3019506c2b4efe0406af8c573b6941c0abde36ada468e077ab6e5c2be77f418. Chain 2 (Bitcoin): anchored in block 953907 (2026-06-16T07:39:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/17144b31-7748-4028-b7c1-fb7d08251e7e.json and https://artists.proofprofile.net/proofs/artist/17144b31-7748-4028-b7c1-fb7d08251e7e.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.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c7c7709f10ddba838b0092c4a8c198a2fca3e3f37c8216e09541978d643790. 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/GBLLH1541202.
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: Jesus Dies on the Cross
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b54d2e35f4625b712ebffcbab24d25e5a270e6fa20faed2e8bfc8da0f33f2f3. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/GBLLH1541216.
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.