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 0x86998ca94adddbba19365bc66b5d71b67cf5e2276f538aa18b5908c36eb61203. 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/b9865c69-aaab-4c82-8716-669f527d1dfa.json and https://artists.proofprofile.net/proofs/artist/b9865c69-aaab-4c82-8716-669f527d1dfa.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 0x54b2537b8c8943c858d82ba6726f0e6c0543631d7f401574121b87be69859e99. 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/QM4TW2208460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc9535169d5304a49101fcbb8be6477b1b80b7620d2d2eef50399bd686e81bb4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QM4TX2200184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaaad84a6b88c6f9ecb0656aaede413c8dfbb91913b3d240b09294b8de6cce6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:36:59Z), 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/ES6101401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaaad84a6b88c6f9ecb0656aaede413c8dfbb91913b3d240b09294b8de6cce6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/ES6101401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaaad84a6b88c6f9ecb0656aaede413c8dfbb91913b3d240b09294b8de6cce6. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/ES6101401088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb794dd3e1c1ed86efa9f93e522bc57c00be72532065949cfde101114df676a4. 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/ES14I2401045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8199da15c09a575b81730b5ac1271d3b43192aa54e4716b2a43d749ce4cf9d. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:51:57Z), 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/ES14I2401061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b93132a557220e2daf53e33ce4913a65368898b6360bd2af3fb78124f6ebfcd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/ES11D2100506.