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 0x66f288ab06f4af846d41c3ccfe3b6575b0871685b66ac1765132bda2d13b90a9. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b1702290-d29c-4bbf-b4ab-049e254fba82.json and https://artists.proofprofile.net/proofs/artist/b1702290-d29c-4bbf-b4ab-049e254fba82.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 0xd62614b338e83ddeb19791e48cdc87cc94fb84a0cc6a4b6187126bfdab70c959. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:48:56Z), 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/TRBIY2300110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f5efaedcc38e1b52994b8f988eae4a3b322d803af5fadde312208cdb21b8a88. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM7282303725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe274c25375689665080f6dd788a4b7e311b6a3545ab92e6d3315f4e3cc672719. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR10S2436184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5bb2b80ac51a82239999f4cd74ffa424cfd4f1cb5781218d37d87f3986cc320. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX762469430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4687df9bbab6ddf5509524950e902e5a91c46f0a743019a2e6ed2e2cc3b1b0dc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FRX452513386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2ec7a8aebdc74afe96f089f2a3d3707e926f5a09020f729a2304691a764b61. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:33:28Z), 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/QZNJZ2513037.