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 0x0811147aa53b9e00e082409781a75c673be612847aeee53bf4dd2f12a0f635cf. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b12753c-1589-4731-981b-67457fd06016.json and https://artists.proofprofile.net/proofs/artist/4b12753c-1589-4731-981b-67457fd06016.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 0xf589e2a82f326e52de7ca6e780c3250acef85627673b4e40d741e6a328f9689c. 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/SEYOK2424387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1a116d42ee39c7517d7fa799c997c07b0ec56ee4ca35e048b4fdcc89f6bbdc. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/SEYOK2424388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18dbf2fd455df99887f6119d894ee85d6522c83a6c21349be358dda9267f892. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/SEYOK2424389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x504075e78896f1a663c45090f63b3ea2a9ad316ab98fe8feed98c251ea79138a. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:04:30Z), 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/SEYOK2424390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd0f1b43ddbe9a216a622e4da8ed2c656edf419fcca0bd6dbc63420741a082cd. 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/SEYOK2424391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90e0f64abbe2d067c8b10dbf6a2b1d18dfa4dafa12236bf6b142300f99818c0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/SEYOK2424392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x621d4eaf07b9a5a15c062fdfe7ba7553bfba7bd7158f3e9210fd806713d62a54. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:33:33Z), 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/SEYOK2424393.