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 0x2198ef0df6eebcdd9a0d6c51fcc966369943410da149a216e74ae6a0e8058916. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbaa6bbe-e6ba-4fc1-adbb-c7d56142d4aa.json and https://artists.proofprofile.net/proofs/artist/fbaa6bbe-e6ba-4fc1-adbb-c7d56142d4aa.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 0x3882bb8deb75c3e74fd6947228647fcda8d34efbef675c2efef2140977eafa03. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/MXF060201524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf853b07d752fe202dc21f7948b9ecab2a9749d9c12c32aba0d562d67b97e0571. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:49Z), 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/MXF060201527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0a4d189c974dfb096b6d4565ab2092ac8ef64b14b42f5c28de30a3e6388950. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/MXF060201528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeafa20058f1f1ba2087b89df5a5998e096a9bf73cdcde9550f2c3ae9abed815. 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/MXF060201530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd4ac661d6067be418dfcb0a735a11fc3dc5f2953b11a35bd0b689eb027f0ec. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/MXF060400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc822ba8fba5320b43569d90a8c0f62e77b016bfef06ce5b754da611774eaedb2. 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/MXF060400817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5808354217f50cc64c1883a91381cd05be74af08a7a3bc64a0a6c4087456a481. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/MXF060400972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60a92637381f29180ab7bf3b0e504100c943c1d4571d7ca6042133af2550eda. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/MXF060400974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e22df7a4dc1f9f504ff585df2de59efdfdad9b68497a999b964cbc02dc56659. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/MXF060400975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ceef5b2b1e647b03d0d36c026008ca9f6fc07c144d42b71a90dee33177c2b7a. 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/MXF060400978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9de4cba05914955719276a9c54f1470ae4e19de7f84bde128271240fe4ea2d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QM6MZ1815699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e372fb6bf68226184f9d527138a47a34c0bfb6bd2d966e6cd1ad43cd067417c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:46:46Z), 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/QM4TW1950940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85cb41719736b72c9c1cad21dc7afe9bf5893576c62af89a3894a2cb36663e98. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QM4TX2076927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7ba1da988e5a59b21221d25bc8115fa906257277feab8a759d5d877477a6e8. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:17:05Z), 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/QM4TX2076915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680dd5c8b019b9c004499c35e346e9421caf3b21b94aeea35f048ae194f9694a. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QM4TX2076918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17274ff890bfd753d3cdb67910e6df920378ca7e173c65bd6f352a30de0279a1. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QM6P42094743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208ac6971ffb8c943b461582ca7e59f0b6daf9c62733c099ef82fa5447fa7dfa. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QM6MZ2208718.