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 0x5f03956d5e445c70441d7058d10284c18c4f464bda36056951c8d4d88ae7b57b. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b13d1b9c-2c16-4a83-8719-eccad1b99225.json and https://artists.proofprofile.net/proofs/artist/b13d1b9c-2c16-4a83-8719-eccad1b99225.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 0x292cdb74233df1949c62e4ea2ccf5a515a2a5ce45d25862dce05a1f75da90c06. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QMVFS1586887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0111291cb59984ab8859578188694c8caff27758ab41116c1dd01ed6d7b9f9. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:01:35Z), 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/FR9W11604212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e367cd906c75420ecd18d0f421ae47564e12a75a970f6714fd7e98dcbcf59d. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FR9W11604214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11318e9aa09651c4772b01a37fea02b56f9f9099bc5b52f47b4c5e2dd39fbb7a. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/FR9W11805248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63f7c6e42dec235e5703552fce03c6ded2709a3b3ccfa8ca5df5ef7b8b40b5d0. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:37:24Z), 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/FR9W11805250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd694b60eca972cc5db66ded2817d41ce9f9ab121e56656eea013232c2ac96550. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-22T01:04:08Z), 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/FR9W11805251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ffcf7b26d254d71447e95d1c667faeee7a10c79e58f31e4537debf0096fb250. 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/FR9W11805256.