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 0x4aff19464b5648104b775e707261f1324525c3a5aba3e1ec15df8c235cb50939. 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/4467f2bc-8006-448d-8120-21df635b4081.json and https://artists.proofprofile.net/proofs/artist/4467f2bc-8006-448d-8120-21df635b4081.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 0x2e49d689ffeea4367724d5385979e08b02e28a937ae951af7aadf74350ad9871. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBFFM2030529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6af9aa583c8df9324d793d0b9f1d2aad0d208322dfdae7da6baf79a6880e97. 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/GBFFM2030533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e5228e76c1de80c650a95561dea1c37178d7e7da6fb5bf42bd0471dc803520. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/GBFFM2030527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5224f75c5c238302aaabe313ea44ec1878185256eb033acec30fd51c22183a6. 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/GBFFM2030528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050238e04803ea99723421b649f0cb53bd6ae667a3973b48739d628b7808d862. 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/GBFFM2030532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd984c610a910b0daeda5e3bfc9d40a6122ed66874918bba6c13fc4994ee96c. Chain 2 (Bitcoin): anchored in block 960113 (2026-07-29T13:38:16Z), 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/GBFFM2030531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fc53986db4f9e252cb8c5b88a7cd3358a84d34346262189dbad9f2523ccc66f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBFFM2030530.
Te Lucis ante Terminum (after "Song of the Birds")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b52d2311609973d4e4819ebdd0fe28bcc1ed6575be4a7dbd22fec50db50158. 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/GBBBB3200003.
Suite from The Victorian Kitchen Garden: II. Spring: Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cc82464b7e4c54001d701432f1d4dc65ad8737d4e4548d379ed14e687840ba. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/GBLLH2375802.
Suite from The Victorian Kitchen Garden: III. Mists: Lento melancolico
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc15643825b29a482040ea4a4a6953c2abd0c1949ece2dae9406adb3b4798e3da. 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/GBLLH2375803.
Suite from The Victorian Kitchen Garden: V. Summer: Flowing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3930b3b508b7c75322e4cfe4345e515462b12eb76f64726c23be41734d1876. 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/GBLLH2375805.