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 0xae28555460eaf4743362468abecaacdfde9f1c2fc120eab98c4bb3adf7c4386c. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c373a60d-01dc-4c28-bb5e-1be93e0ae0c0.json and https://artists.proofprofile.net/proofs/artist/c373a60d-01dc-4c28-bb5e-1be93e0ae0c0.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Pater Peccavi: Music of Lamentation from Renaissance Portugal
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 0x2dec5d09db62dd4f6e4dc61332c30896612a2163c39500f973860e465db63dc5. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBEBL1820502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07865536df28ee1f5adeaae50cc796c6ac27ae2426260ef3da30aaca92267156. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBEBL1820503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb67bee0c2eb1f60321deb3558cb2bbe8e50cb0978181fc6febf8101e70582a. 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/GBEBL1820507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99db91beb1baee826be87c7d6b485ee0c7ca57e1ad8a625afa59a9be2b33fe4b. 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/GBEBL1820509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8841ceb8554bf6a5696d42343c3551968cd344ca733906824a60173d348d3138. 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/GBEBL1820511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ecd190137a22cc6f8a078988cf4601bcc0f60cb4fd967e1c843c75269478249. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/GBEBL1820501.
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 0x1d50e30955e8a338499fa35bb0768aff4fd32e5b360c3fde98dbd5110328d133. 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/GBEBL1820504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c8c38475e17cbc67ba2405f6ece7fd7ac178968b794479f7597881a6f320902. 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/GBEBL1820505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fd6a867eaabf1466a1a71b613b34850ef4b1781db367c18c2d3fb1ae743c92. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBEBL1820506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4fb88eb44bda9aedac740b90da8ff3b47d6f99e9e8c5096d5786c8068625c9. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/GBEBL1820510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cbbe7aa799d7957993966fdda212fefbddf58cad6bbb5bf505ff4427840a7e. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBEBL1820514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de5a351747a5c13fc2568b4192d1535a4b1be9b9bbc5c62ec7df26ef92a9812. 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/GBEBL1820515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25fa6e6f387887c2be2e87239f093bf7ff18394838d3a19d559a97c3b6847e59. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GBEBL1820516.
In Sorrow's Footsteps: Jackson - Palestrina - Allegri - Macmillan
Christmas with the Shepherds: Morales, Mouton & Stabile
O Virgo Benedicta: Music of Marian Devotion from Spain's Century of Gold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b179dc12a73d4a6501f5b0639567754a263034b0793b4d775de6d4446029947. 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/GBEBL1108606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfefa6135c111b15351f80d5fd3fa5ea2fd7d7502fd691e2773ff47c6082bdfcd. 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/GBEBL1108604.