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 0x42d0130addb4fa701bdde3e4b7651583c4da4e36f4c982864779fbe2d1de9d1f. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b5a0980b-9655-4d67-9f71-6fd96bfa5ffd.json and https://artists.proofprofile.net/proofs/artist/b5a0980b-9655-4d67-9f71-6fd96bfa5ffd.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 0x98d759cafdc8ed1af7c2deeaedaaf02369ecfbf92ca58664f9daeed3c66333ff. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/TCAHB2373773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f25ea033e0414e473b7c033e8cc43ba717599e62c27a3451b35b52bd14c5b60. 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/TCAHB2373869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f2b908ad585feb2d168aa9b46fea49444b7beb97346a95ed0fc2f6443095279. 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/TCAHB2373887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2cb9131546922bcac1604954282ce7752f367dacd32eabf2ca9f8e1a7a300d2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-21T08:30:46Z), 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/TCAHB2373901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d18c53b60843644ae02ba09af7801dc0d307ca8505ac3222033efee7ef22f6. 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/TCAHB2373933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ff16de058b9cd081768da3290504293611098510c3154dd0e0dfef9d6439cc1. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/TCAHB2373945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde01d86bd882836fe5f945a2f6fbf0279a37d0c6042aba79e7eb68a45e8dd52c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T18:10:36Z), 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/TCAHB2373967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad98426b749f521ec25d28e3e10ff7647057847e9e8870d03e32ea008bf80b87. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T05:17:52Z), 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/TCAHB2373981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5908bb0c54e77b3f042b4897e7e1ef78c2eccee1e13b7ec29fdfb4baf78314f. 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/TCAHB2373996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8716041bff1313b9944f621b0f439b3e8cad5f69507030ce1a4443fa86b94cd. 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/TCAHB2374038.