right|thumb|220px|Wild angelica (Angelica sylvestris) from Thomé, 1885 Angelica is a genus of about 90 species of tall biennial and perennial herbs in the family Apiaceae, native to temperate and sub
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 0xfb6b730a6d4d252535bd13a6e510b56d0d12bff6ded721b1fd59f36fe72b490c. 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/f86d7e03-a611-4e41-9421-d024767e1765.json and https://artists.proofprofile.net/proofs/artist/f86d7e03-a611-4e41-9421-d024767e1765.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x883aef0f3c77c0e6fad97bf01f29bae8f8f7cde63fa443c62f109fec2f112b3b. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ITB261900900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fbe99514fa3c92f13220e44bd96f588e21d8f287fdb9b4965d127b89987a31d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-20T12:08:47Z), 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/ITB262000490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bd2bd0706e654995d9e07673f4c04029d4e1b8d62501ac32441c92210e6989. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:36:10Z), 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/ITB262100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb9541639980136c384585a9b4e160c8287ea90024056cd5488bc4975eea8f3. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/ITB262100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59720f72f2d18661b1d183dc21c54d4a0b37a8ad8ca17ee7797c04164e88ffc. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QM6N22308138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75bdf9a128aee52e2756bcff70ebbc6210c245a2bcefde3e8239168659d4ba4. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/ITGI82300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79c3e5e5257b63b440f532a85ed6f3d7265827129878379ebf545f632fa13e6d. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T19:07:32Z), 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/ITGI82300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75bdf9a128aee52e2756bcff70ebbc6210c245a2bcefde3e8239168659d4ba4. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ITGI82300023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9673784e954dda18d2b9ac9a3d5d1694cf02c254605d36407b78ae3b64ba71f3. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ITGI82300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59720f72f2d18661b1d183dc21c54d4a0b37a8ad8ca17ee7797c04164e88ffc. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QM6N22308138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf716676c9a58a6d16443be1fc0c4002ca00928c57e53be3017c8a8a52dfa41ca. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ITGI82300025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b6eba647e5b8f8239ea260ccedad2989f75364f67344b576b9e41ecd2ca1bf. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/ITA642300099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c98749e405ea8f2e7079413d7cf6a161b0c383160a001826c39f8b9d105ef50. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/ITWX41900004.
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