The Choir of Christ's College, Cambridge
{"copyright_id":"0xa633496b573ba9b5447f6793d6534c560e7d7c1ff2b40d8a6dbcccbd5faa466f","name":"The Choir of Christ's College, Cambridge","registered_at":"2026-06-15T03:53:09Z","symbol":"NIM0673685","token_address":"0x316a7abfb82cd249a96c084d8fb85dded0326b94","type":"artist","uuid":"dd28cce2-c87e-467d-99f8-a689fa58c6de"}
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa633496b573ba9b5447f6793d6534c560e7d7c1ff2b40d8a6dbcccbd5faa466f. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd28cce2-c87e-467d-99f8-a689fa58c6de.json and https://artists.proofprofile.net/proofs/artist/dd28cce2-c87e-467d-99f8-a689fa58c6de.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Complete New English Hymnal, Vol. 21
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5973efe4f0a0b360b93b754f993786eae254a67d2d341f91ae2009779fcaf011. 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/GBXUX0872101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe9d1d9bc6e1287709ef9e4d4114557a1910fb1f9a7d5d9cbaf3d5cba903e3b1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/GBXUX0872108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad069d2506e813d5c80353b48373446fecc3808ca0f2c9f2477a4182ff9e216. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBXUX0872109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cf01146749ed3460b5c78e63f31edc99fb4f181ef246a6ae8f541d7707f1a2. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:17:45Z), 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/GBXUX0872115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc1016af7c9e595dace4ea564d935e393adb37ab8ea636401efec87050a48821. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBXUX0872119.
Thou Knowest Lord, the Secrets of Our Hearts (Funeral Music from 16th and 17th Century England)
Burial Sentences: I. I Am The Resurrection
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43c1eb9ee66b40c38e66a61e1ae7eb2952fcf145a11d12302057160d01c65dc. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:57:04Z), 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/GBABV1010597.
Burial Sentences: III. We Brought Nothing Into This World
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71e08efa577faf9e03162aed8abceb0958750a910aed83f750c912cf2f2d0d4b. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:36:12Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GBABV1010599.