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 0xf4e099e796436357922c683f90b9c019a41827b35aa699f16bedcd1d412a35b9. Chain 2 (Bitcoin): anchored in block 953654 (2026-06-14T16:26:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/480c06cf-a084-4082-9a3f-295c924fedac.json and https://artists.proofprofile.net/proofs/artist/480c06cf-a084-4082-9a3f-295c924fedac.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 0x2fb0d1a26f7f6fad82794c41740d57b1288a44454e00600dc395df4deb92d822. Chain 2 (Bitcoin): anchored in block 957684 (2026-07-12T09:22:41Z), 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/SE5752218045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf964afeb00a7e44835cd349041370d3d92161ee6e79d8282b0d60b3304114a0. Chain 2 (Bitcoin): anchored in block 957690 (2026-07-12T10:16:40Z), 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/SE6HN2250359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db58fa9546fc89370fef523d04caaab0d9f6402d82344d9d67c5d25d5cfffb2. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/SE6QE2260744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b10daa8ceb0a91725f28cd04d2064fb9cb8fb7e979d37435589b217eba52b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6QE2260803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e041611866e4c3c0295e02cde23a977e61d5f677d1b0572b873f173e6989dea. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:48Z), 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/SE6QE2260804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb1e68b4eb5aefebdbdfcc867e1d5aaf81f1e0740049e0c851b19947006b930. Chain 2 (Bitcoin): anchored in block 957674 (2026-07-12T07:50:41Z), 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/SE6QE2260805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8249fb5b2c32488d117345c82acf77820d95c39da24bf639efcb24950f290. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:09:29Z), 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/FRX872293048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b5abac6ef2685881a395ad75ed7646d1ae00cabed171638ee2f1c022aaadf99. 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/USA2P2335558.