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 0x3ce4a00fa62da1e808195b7de0cd4c033bbae68d5dbee62734a599281db053f2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0e0e0175-94f3-4ff3-9427-c040be57b3db.json and https://artists.proofprofile.net/proofs/artist/0e0e0175-94f3-4ff3-9427-c040be57b3db.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 0x0d073f44ace4356d07c4cc9fcf63e7d4481beb5a04ebbb9d4c77a80bd2427f4b. 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/NL1AP1958434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd418e7a01c715ac1f95a5e04887aa9a42520fd377c41db6ae22cd38b9bb8f770. 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/QZK6M1908789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7697e6f160c561d90951cf7f20aad179f64655f70f2b1572eec296e23b1ad6d4. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA72085605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda719b24492aee9513a16babc2252a57cd14312e57a75dd82bad9933346c0578. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/ATEK02077093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe660636d519530c09731c44abb6a5e429370f6c81a39401b2095466886c7382d. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ATEK02277131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0b32a21c0aedb0f6613d45a1e060b5ae038ad8da120d6fc4e3f281c1767969. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:50:01Z), 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/DEQ022391096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6b1e226aa0802577e2aa59cd7dfb61caa8c2363502bf9cd64821baf19d0e1a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DGA052432685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e751372e0d334e59fd5bd967fcf62549f375b5e6396d112621e010dc27b5880. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/FR2X42560495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3c885b6170c839bddacc342835173b4415494c4edecdf8ef9557857d32d340. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FR2X42560497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aef40f8b1f66fd98357aac9ed8665e0577c0bde24e4135860a10d7085249fd. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/FR2X42560500.