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 0x1275af464fdeb41ee2fbe1c0d0a98e478bf579666e0e59452cc2373bb8cf50d2. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d59ae020-2bae-4db5-994b-afcb4ae87dc1.json and https://artists.proofprofile.net/proofs/artist/d59ae020-2bae-4db5-994b-afcb4ae87dc1.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 0x3e4e45a753d2e316dee2872f57a124f43ebce1c1909465b74ce2511b69e50605. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/ITS782400309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed677f4a3788c703ce3fc7c3607fe0b1254785fd556cb06c7ee2e63010e7700. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:18:01Z), 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/ITS782400310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda577238a9c17e41430a82e2c9c7f42f5358a396ac6a87647dec1ba256ac539. Chain 2 (Bitcoin): anchored in block 957699 (2026-07-12T11:51:06Z), 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/ITS782401021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39733755705708c75fa1aac085e83156cc494ae7bfc5059cf771cd284b99ae3b. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:31:26Z), 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/ITS782401077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a47b054da86d72405a4e6f5958dc6c4590819f2cb469a6faa18056467a27f4. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/ITS782401078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f283ee01622d2f4aae48780e59a00f82eea4f85741163de21275e78ab40ddfe. 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/ITS782401589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x892f7de2b0c1d59b3a43c16f4196becfb32b42df5d6a32513f4d20bf44ddda6d. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/ITS782401747.