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 0x08da3346d2001b9b49ae52e45179e39196bf8fadb83fc2967bfd77c64c9424fb. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36bd7856-6ec3-47c7-8827-c8f5957d0900.json and https://artists.proofprofile.net/proofs/artist/36bd7856-6ec3-47c7-8827-c8f5957d0900.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 0x3bcc804afe88fda0808978c2a39865ba1794e38beb47ed691d766775560c107b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:29:21Z), 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/DEZC62599681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815785b67045f3b2573a39bbe689bda394e05a9a6005aa2f6e5277db900d09d0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEZC62593782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d090249060f22520bba64b1dd870217d6868c83046b2ab865c6ec99c029c413. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEZC62587607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f5993f2d75c337fe794aa4369b4bd750fd3a1ca1b684b2414de494b599f6b80. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:12:00Z), 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/DEZC62504982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90b02edb9974c701429c0894a181f0a5db5c1100bb70f9668dd7d64731d31a25. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:46:47Z), 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/DEZC62537045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf85592bf3a86df40bf23f6d6bb8a857243f10c95d0f009d8ec666999e3294367. 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/DEZC62532124.