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 0x2f1eb52f5b6f2b13b3b1ae31f250c8bdf4d494fcf1d2bcf1f0e4d1a6b931c23b. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/90fbde35-5d83-406a-860f-9b3ed0b5cb27.json and https://artists.proofprofile.net/proofs/artist/90fbde35-5d83-406a-860f-9b3ed0b5cb27.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Samuel Sebastian Wesley: Sacred Choral Music
The Choir of Holy Sepulchre, The National Musician's Church
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 0x497dfed4af1d856ce94dc6fe36216fb4859f28e93db293fb2a4b2346fb9b19a4. 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/GBEBL2426801.
O Thou who Camest from Above (‘Hereford’)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53637d5a2334637f59bd0d5701f5af24dcf70c82e34c3d0fc8480f58dfd9ad8d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBEBL2426803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec31498937c0d26dcb30887318026b4c5d0989cac9d1da4a31ebbbed98ef3043. 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/GBEBL2426809.
Robert Fayrfax (1464-1521): Music for Tudor Kings and Queens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee2553fdb904ce1674f0f2a494bd86bc8bc43a0840f48cf24166f8900d95a68. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/GBEBL2126501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e1500d8363bb941aa262358cf7834754f7fca643d5784b8e27de340e15d6c4. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBEBL2126502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06157e4917c7425cc404aaefd3ddf994cfb8e6aa28e79eeff94a7bcbaf7a800f. 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/GBEBL2126503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9ca28bf30450cf86b58a143edfa47ce32a0f4fd918fab4415361fb7c7bfe4a0. 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/GBEBL2126504.
Missa Sponsus amat sponsum: Credo - Reconstructed by Roger Bray and Magnus Williamson
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9016587d6762653e2c7c6f27cb7e8878e5c14efb8ab7a3950cec38326e04690. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/GBEBL2126505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x765ba4026c8cd5f972417c030848c01207492da27e57c14cef673b1014e51d0b. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/GBEBL2126510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b87f585cdd53aa3010dfa888ec0dcc212f8d70d7f2a9db7c8a5219ed1271dae. 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/GBEBL2126512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ee4e09b98525816a4cc20f7bcd31c339becbdb80a1010cad15528adb7ee7a4. 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/GBEBL2373301.
Psalm 12: Help, Lord, for Good and Godly men
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa826c67d9566fa547690547b48596d4a3ff44b83d5f30e740e17f5dc2bae0738. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBEBL2022708.