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 0xaf1a51532789cc7034a34673b1485d51c672eeacb94a8c2167d6f1c99db6a6a6. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4ffe15f0-d177-4bc2-ac67-2d146dce2df3.json and https://artists.proofprofile.net/proofs/artist/4ffe15f0-d177-4bc2-ac67-2d146dce2df3.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 0x392d51cc207b0436253fddf6d34c84f344a059b92d43cfba8fce43dcd0152e5b. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:01:09Z), 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/SE6HN2169348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6ee5d5362eae114f7e5886f784c50bfe8c0e3511b45009829ccd756f679d708. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR7JK2200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9e7b6c8d2dc9aaa1bf4b571e94c9fdd53d8eafda1381749add2cf295dddec5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FR59R2271010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf558e49cc0cc971ed67d9a0e298709ef629f4e0cf5343f2444cc53b01f2036fb. 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/FRX202254137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f77c7d6de99ec7d817d3ba0418f681087120b2c3503a84f75a41e07aa494d51. 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/DGA062221338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde9dacaec6c360267304faf0b7834267a97daac3c96b06a0114947b1dc238748. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/SE6TI2353679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e37a6bc450680d6b88bb935c3d0e4fe085d3a3b1412b9d99242132c8752cc9. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SE6SA2320236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1068b3c28c7bda47ff9e89e865ead2e918b5a1c67fb434804e5d5cb499eb77a9. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/SE6I32416355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ad05519f36a25d6cce399062f0e3d7df0c108b7ef548e2d35647cd675b9c635. 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/FRPZ92526470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b774d89e8105fb58ec3fa146454d65153bc39071b11023b934914f55ac7d4b0. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/FRPZ92526450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7e0a063148ceb6e02e565c55b58e0654934a61a36c7e3feb64ca82a3f655bc. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/FRPZ92526480.