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 0x153ccad9a4b87ece62b9c0c8380738125839f05da398a18dcf6c281f2237abc5. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1b7738d-15f9-4b6e-b914-e882935d0c19.json and https://artists.proofprofile.net/proofs/artist/f1b7738d-15f9-4b6e-b914-e882935d0c19.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 0x6c59d7066aeb89c4bcf3afa4dbb97fe49902755d3f2441f6a497d28565bab24d. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZDFP2043837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6dc0c0e8aef0e66033d44e0d85d6476df9e38eca5fa8a41cb68a575e48a513. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDFP2058284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b7c969aab6b023ea89236667eff2158f0fb45540d6e05dd4ff95e18c5acd072. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZDFP2058285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c4366833b3112c365ff23dbbb122f6b341c149108b698e229e969c08c294f5. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDFP2058287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb389a446d938a80fc5406f89a3db88c5b3bab587604c70094336bd4f61e8e32d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:37:51Z), 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/QZW9L2398085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded18e30037334f7bc6c3bd88bb6de8c3d6d8363e5cc58719317d7f27527b3c2. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:32:39Z), 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/QZW9L2398086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e41d1f4113631026e36cf0e65ca773965dd0203703915165a136199d8e343. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/QZW9L2398093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfa4b54c0d633c71c0c4992dd56b8dcdcfb196e4c192a78fcadd704abae1acc. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZW9L2398096.