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 0x3c86d1e08dc4c2ae8c6c92813b092eedaa43788af21dfb2e99e3382b64753bd2. 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/01e92014-e941-4e43-86f3-45e07db52ad0.json and https://artists.proofprofile.net/proofs/artist/01e92014-e941-4e43-86f3-45e07db52ad0.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 0x2579b39c8dc9fd78006f075f3700669df11b29e16b67af080b3a0e888c6bb13e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6XW2379656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a979de3f54309264a286ab13612514b7b78fd77b41527296a0802228f876b2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XY2344694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95fd26cecc93cea7ceba38506053dc0d0a17e02a51a873c498bc0d4fe73e78b3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62370762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd98013c978d198cefc357d5cdcede86e5723bcd9f13372bdc6b1a2cf09b0b205. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62370833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213dbbb4da6eb6255d0d64bdc66fd7aa962d6d71f8637ad6261e15467f577bd1. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMDA62370893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x683fc51b3b045b06eebd3340e84f9b6cd919663bc5a3689d3fb62c6dae6103cb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QMDA62370968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcee52abce47e424df8c408046804fdc704907c29ed781d59a0c87871944bea9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMDA62371027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9067ccc2391190c48e0e8ec3417777b788af781e35a160256f8595b7a57ba81b. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XW2343557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a431584c210195b357bb895eea3ba9e393d03eaf445e6893fdb502f202c7410. 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/QZNJX2399414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93649e8b03ca643d0c566e9a49420efb778bab331e9c299dde7cd4fc8ef7df79. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QMBZ92303852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33305ac3022f8916c883b67c445816df6445c3904497d314d7c2c5769c6afed. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6TI2366630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80c6a21ee1d14e88f68072904927215213de311d51b5db0250411d90827335d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2321191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bf31a7b2a0c92ec03f95dec4c8d567b967a13ead0248d3e69165afde48357e3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6QE2309091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d5b78b8b738ef3db7b93fedd5c7afe2c7a686d728225968d8ad890692b24860. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BK4DA2511191.