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 0xc3172b2f8cb669afcca41416dae01883f3c621eb579ec9d9b90d08da813076ad. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dbc2c501-98a5-4f14-98c6-ed8c817ae7f8.json and https://artists.proofprofile.net/proofs/artist/dbc2c501-98a5-4f14-98c6-ed8c817ae7f8.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 0x0758ce79da9104de6b78c507fbb83f2156198cd54ced1436275edddc214b1e8e. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:17:41Z), 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/USCGJ1856878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed6a53a6251cd5db32c8b7965f6c957dae96c465c498103e373123b3e6b24e9d. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:20:59Z), 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/USHM81818162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fab8786e35442447bc4ef28b1ea3313d0ced8d3e46f8398dfe4a5ad37b1c1b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM4TX2034068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a8215b50e09de7cf8977ea2db1bc7c0c8f71474ab48b6e5597e1c9db587d18. 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/QZGLS2398773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a4378ef12c38f82f6022c4a1fb784ad8e5c220452bcb76660c4440e7f6a881. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/QZTVM2485090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a374c43894c07fb1d2e9251fc011f9b30c58080bf28abb2d819265e7103ad28. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZWH32500311.