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 0x9697965509e01517ea77c7fb7024ebb54803cc61abd7d2075713031cae0978af. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b6d4a826-7cd1-40ce-9d77-b753aad440b0.json and https://artists.proofprofile.net/proofs/artist/b6d4a826-7cd1-40ce-9d77-b753aad440b0.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 0x25341db16112bfa8031c35b72620a8955adc572069cbb984ff0ad3322657d48e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:01:31Z), 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/QZHNA2456145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac76f0998716250bf4a40357cd678f7043d960d94a154d0bdad7055580eed02. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T20:29:10Z), 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/QZK6P2495253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc74ea1dfbd395a8b3d22e87e32fdc7f05ddca33dcdafab914dce8f7f4b5d740a. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:08:37Z), 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/QZWFF2479751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fe1d8106438fc8151985428074e2af89906c40660ee88585c5fc59223e3147. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/QZWFF2480536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbc1b515f6600f063057a02c33a81837aa02ff1d9fec9eb481cf497fd4fa80. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZWFG2408077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65ef86d90561bb3c3166424b63fb18da9b1bf6e1ae51f05b9fe0267d2042fd82. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T03:57:58Z), 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/QZWFG2441667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f35ddf8151190aaa1c7a5335e3b848e13ae3bc736d351522342670dfdb680d. 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/QZWFG2438483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1553de528b0159608ef77a0e6bd5394d4da0cbb010eb0a8417dbc81760e6f8a. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZWFJ2461058.