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 0x5180bb6290268714fecf6a30450e73b6e35f6a4965693ffb6d4283e93a9acd4a. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f141a10-0251-4dd2-a855-94056f038986.json and https://artists.proofprofile.net/proofs/artist/4f141a10-0251-4dd2-a855-94056f038986.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Blessed Be Thy Name (Arr. for Choir by Alistair Dixon)
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 0xb2977f394e558b552b1c9d90f7a1fc30566bbb022cf7aba9d7bf9b816b32e6f0. 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/GBQRF0808240.
Forgive Me, Lord, My Sin (Arr. for Choir by Alistair Dixon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce42889da45c3d579ce514032dec15fbc6fc39e2b79be52a217a2e33dbeec09. 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/GBQRF0808233.
Hear The Voice and Prayer (Arr. for Choir by Alistair Dixon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358f865a14e50ca1b0cc9f467144389e8fb1b28130b06f3d07d221c8dab0994a. 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/GBQRF0809972.
Sing and Glorify (Arr. for Choir by Alistair Dixon)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81643923eec22c6f94556cce4d09c70d64a7478f0eb3dad3dc5706f460f12d75. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/GBQRF0808470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa585762fc01ce61e48601fd88481e116e58dc4b324be42ca36f4943ac100c661. 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/USA560540842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5c5a5950d683dcadc71dff2379ee66e0d6cbe44ea08ad70ffd864ed3dee8ac4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USA560540780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfeb23d5aa5e82351405d6a308ccf963f47fe9583e2db2da8a3233ec951ce4a. 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/GBLLH9700212.