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 0x502de2e9c9464b160b9a94429a3142985ca868ddf8b851b711e46738a09514b6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c7770ff4-1bb7-470e-a210-63dfb3e85c33.json and https://artists.proofprofile.net/proofs/artist/c7770ff4-1bb7-470e-a210-63dfb3e85c33.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0xbd688913c4ad03c2b0e28681990b4cbc4354ce65b5149300babe81387733c06f. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBMY51400603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf61785033505d5648ebc4565abba2194e36394cb5a54f3cc717cff012abc2c. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBMY51400602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7365ec7a59e35da13c750f7ce8d0a5ffa192cfb2063ebb581d66f848e789a5a5. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/GBMY51400605.
A Nightingale Sang in Berkeley Square (Arr. Ruairi Bowen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd66fc68c78bf6f17bd6cefcdb55350121fd28c5152c49199de3f91abba3c24a5. 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/GBMY51400604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aad3c82ce4c0280f0c9af65f51cba9ce0cfe4f0453112cf247d1b5a32193606. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/GBMY51400606.
Never Had a Dream Come True (Arr. Peter Lindsay and Joe Adams)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9729b3b565c42a89bd8455cd7f0147a15856fe74746ca39d833a42344f849354. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBMY51400607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc87f5661b384aed59c6119d53bd37b8fa5b24ff82fcf132f939598b971cee56. 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/GBMY51400608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408ca0f5d44a6e4f6517b65e8b4ff8630a1ab58b28ed566b4823c41f2efd1c8c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMY51400609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8034aba1917b9b14c5723b92b1b457a0b7683f9d1e6a09cfdeecfec1af2c774a. 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/GBMY51400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc44cde594337040be1416754db697928e8230c2708ef812f764c60737226f89f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMY51400611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb9cc111a0aa42afb71302627ac8cca92a54a0f65be2ec2ebd1d1a7fbd61d8b. 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/GBMY51400612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519f4b1d725bdbfb18ba5c7ccce36d79a4625086da881f37598452f362e8eb2f. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBMY51400614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fa60fcca03b7deee0efaf2b7cf2d7f6e69375ea6be3ca6a21cbe187527b66c. 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/GBMY51400615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad48ee193cac3910d9089a2edaf38d880fc3b77b86142145c39592fb6ac68fd. 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/GBMY51702305.