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 0x55aed4cd3f9d7fb0bfce8c842b1e24244c1031921407acafd86075043473a83c. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f5df55af-ab8c-44b3-a166-bbe3309e752f.json and https://artists.proofprofile.net/proofs/artist/f5df55af-ab8c-44b3-a166-bbe3309e752f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Collectors' Guide To Rare British Birds
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 0x4e2dab0587db18431a42128205f44b4f67cb784115799a9eed7f9a56dcf4322c. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/GBF076523250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864241fc9885a13e1d67e7fba5cb75bf071581e422df21af7c71daaf2dc60c8. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/GBF076623640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6040e904b5beb6d30a324cce757b5e318098d43cabe9560a37176b21bb6b6f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBBLY0603552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5db292c93b37f2f439f86ee1c63d06868f4a5752e07a2dd62d308107b7d1f9b5. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T08:11:19Z), 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/GBBLY1401671.
Listen the Birds of the Dutch Countryside
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c8931a6361e6d708afe8acbf5a22561e3cf403d8ab6671c5a231800d069e98. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/GBF076524870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d46cc2b63659dff0e9b500038330905e04eeffadead1953873544754d9eed25. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:00:29Z), 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/GBFO76524890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0864241fc9885a13e1d67e7fba5cb75bf071581e422df21af7c71daaf2dc60c8. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/GBF076623640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d0383f9e35f3eb7dab0c63624d8b2fbff15dc773d8acf4e08c301d4a1f58976. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBFO76323350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6481bb0331c54e31bc0871d9db6b6aca63007242a1abb001f6dc7a6ff478d6e. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/GBFO76323360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c7dea14d9b6dd5cde6c76886a7b6127d794e522fa94524523b047b0ed25fe1. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USR010613490.