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 0xd85515472fcd2b559313b908ddbf83033f328d0d0e10e6b869ab8d4ac4add9fc. 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/c273e40d-211c-4acd-88eb-324eb634702c.json and https://artists.proofprofile.net/proofs/artist/c273e40d-211c-4acd-88eb-324eb634702c.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 0xf6beaf65d393073df5e63d285265acacac2e0cb792df0eeb5a90951f8c12aaa5. 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/QZDA41870917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59fa52dd5e4173b658bdadf1f76e2f4adee549c875dbf91cd937541df43159f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZDA41870920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb30c91fe14a6d481d927a0160ec07c1e38c235403d194216c598a9506d85d9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA41870921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1796934f90f079cf0c127f74b41a83c7ca8ffe55405271eb643220469fb2a13d. 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/QZDA41870922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8388d2366599621065291c9ca2d9ea204ca450fb9971934ca75b5fa52efb87b7. 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/QZDA41870928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974b4ac6bf81ace103cb57ac154c8b5e06f3c22b1229012c122e4bab3801003c. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZDA41870929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bced512f1358aa3c8a67d5ee51e0958fcf10305ece3e723b965937a531f719c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:02:59Z), 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/QZDA41870930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1c3fa7bd0f7aa46abd9f01da30347b8d699a7769981e565281793da15434b4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QM4DW1845902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7160bb72615c1c160c36213ff73eb8d1ad2f0b7bdb70d7f438ed38ef6ee1f492. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-19T22:59:45Z), 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/QZDA41959138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137f466b45bdbe4e74a069aeb20abe6f507d395c8dc6234c230a1fd95b0db865. 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/QZNWY2523663.