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 0xb392a0e6eeee794be58e523b0a5f3f41e8ddff01899acfb9b32b6aa9f0141bff. 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/e2a4fab0-aa54-48af-951b-3b7cfa62b671.json and https://artists.proofprofile.net/proofs/artist/e2a4fab0-aa54-48af-951b-3b7cfa62b671.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 0xcd19515a2b8f5b2c956158c81c9be1ac9550270d0d175e0d3d9f8ff0065e63d8. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBD9H1700041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685ec0f9d8be735200ae135bdcdcd91ab18e14e6d3041c0b5dc1deb82498f78. 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/GBD9H1700042.
Elégie in C Minor, Op. 24 (Arr. Parkin for Cello Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c29057bd4e38d730a686c90e3913fceccff04faca39f8b6e37749e91434c20e. 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/GBF071900780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3887d4039d76e86e6908ebf326f23c93cd5529b2f55e2052ea86b44e7b30aa84. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBD9H1700039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cab10ee8ab367828b6434e43d40fca8c2ec164f1b49b195d01237a2f2eb1dc9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBD9H1700040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe685ec0f9d8be735200ae135bdcdcd91ab18e14e6d3041c0b5dc1deb82498f78. 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/GBD9H1700042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe460963f6d19e8948a045805e9d1de374ef3c23f9415db22ed9ff6ad423b32d0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBD9H1700043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb2ada78c6c0d37fe91eb07e4bf6b24c0818edb24a31b70b65a4d0666941c296. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/GBD9H1700044.
Variations on an Original Theme, Op. 36 "Enigma": 9. Nimrod. Adagio (Arr. Parkin for Cello Ensemble)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bd1c1fd49266d7f083ef951871956a92ed232671592bcede0ce0d1718aa2eb9. 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/GBF071900720.