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 0xba95718b0ce964edfbadbfe9a3846665ee72080632db3591f495c7e102595770. 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/fafbc357-9085-4b9b-a264-1d1bca075252.json and https://artists.proofprofile.net/proofs/artist/fafbc357-9085-4b9b-a264-1d1bca075252.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 0x4ec7c7aff72b095f5bd3f509fba8a401307d9d68d66c0ebf9d5c95f33e92c2ea. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAEW2037340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb3d52b5254dd329db85d116fbe8932786f08a740f326e9c77a16103d725884. 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/TCAEW2037342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd5a253b9177659c81fbc427f7ee7439b31d4353f153359bc60c8e0aea62b38. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:31:47Z), 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/TCAEW2037347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe89b76045d9a7c24c84d2c9577a20948cf4c00a273074a0ea4787ab373d2ac55. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/TCAGF2220460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8847612b12179d250c3750c79dc72d74f13e60aa0d72d74764551cb9c22591b. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:31:49Z), 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/TCAGF2220462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98293651e9fb7c11eb7886dd38d3a31d3e425e16da419765740d0c89df5885fe. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/TCAGF2220463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d94aaf81847abe78c8153659c426ab43dce33557deed87ce64a22bd0e30588. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAHQ2348782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e6ad2592824af65f9978daf6df1a2fe17ddb4da5ac67c671d0407fd13c6fa. 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/TCAJF2500423.