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 0x6b9328d4a80e3063581acb85bfe2d3abd45f4e96712c8f962590e2a7edefa5cc. 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/2c2b411e-d6b6-4b73-b119-f66139805f64.json and https://artists.proofprofile.net/proofs/artist/2c2b411e-d6b6-4b73-b119-f66139805f64.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 0x632a15e1aea792fe1066c3d1d7241bebbf51bb88a139587b004402337040ec94. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/US3DF2517717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf634d1783af19d90c3880f89883beb67293345e105ff2955fc67c6a396747d27. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/US3DF2517720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2a7643c3a38d95ba210d3607c3b443fafa1c78bb70d1f28c8bd088d41da62c. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US3DF2517724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9976f9f297ab0489b55428654b2ab516f042bae960fa471bfee6b7e20a769aed. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/US3DF2517726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb584eedd4681b3b9717e1430f2114eca398ddab25ca62414b3a6194744988db0. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:03:58Z), 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/US3DF2517727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8080df478f0dd5ae94cda1cbc999b3c6258e1e78fd2d1b9df8f15f93b299a3c8. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/US3DF2517733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433baaa2f0ca8c700f8609b11518fe5effe55c866e4378d7c37c6bee08d53cf7. 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/US3DF2517792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b5ae679b64925de78fba994d5bb6708dc2e225dcde086f3a0d6d256265b57d9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/US3DF2517736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00911f4bc71d40e9e9fa239d947ed934e27cda5a71b59fe850e49cb44695d19a. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US3DF2517738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ed4779db1d477bf96450242e8f6fbf0e185c697701883d3f9c927e478e7031. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/US3DF2517739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66896220841e425e0bc06403a0b966f93dff6d44de4c3c542cf5062190715834. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/US3DF2517743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x366d64abf66c82d6b48077cd6608678227960c076f4c3f2189fe3216083283b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/US3DF2517744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb9066aa4a5b61ed783cb4cb3005273209b27cc4dacfeb8b2120d58bbaa3aea. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/US3DF2517745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167d694be5b0d6292815bd324d3b5497674f5342456fa3d62590cbf8fe0fb167. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/US3DF2525572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d76fb7273da15980085312609d9235e7d6b8bfd8929fa964cacfa57ebca95d9. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US3DF2525573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34f129dc3f93c11ab693518a1a5a6bb3cd6a56080536022d793d4c3c378d5914. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/US3DF2525574.