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 0x3fdfe0333324f52f3184b74a86d811fd65173a9e3aa766478bdd60d66e11a51f. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/633b814e-f163-4a5a-8630-aad6df579b3f.json and https://artists.proofprofile.net/proofs/artist/633b814e-f163-4a5a-8630-aad6df579b3f.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 0xf00c52c2ce802327f16f35ab505387996ad1817ed349ea00153ea1930c7782eb. 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/QZEQU2074832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5fa5eeee12cab924bb5803882b83356498c78d37d56e65fb10ac515df88302. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:47Z), 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/QZEQU2132949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd303e9f8c913a8f34e6c9219cc743f2026a6aeb2c62d9258ab7221f08d2fb68e. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:45Z), 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/QZEQU2132951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623e85e9293a5f3b34203180739d08484744e2859c9a903bb0e8a06809c33901. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/QZEQU2132957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f7a92d001969cd3c9af38b0b2f4ab4e52297a3e0cbf1967fee2fa97fd9d3e2. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZEQU2215150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd104f8c5d436e7839c450a158dc9b700696bc1fd95f0fe90944a4448fa68d14. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZEQU2251120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1d1b2905a7def0673b719b3411f8d7c27d71dd13a6b977a3864da4c1b5fb49. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:42:46Z), 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/ES25F2301121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a4eb1dbc05dbefdd9d2614a51fc6e4eabf5c521e82fd83ad4b2d9150dbd5a9. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ES25F2404112.
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