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 0x8d729cbbddf86c08a8ed81a9335438624f5e6e07922e1ab39f25420e73a3f447. 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/44ad6776-a109-4045-91d6-52699b8a1bdf.json and https://artists.proofprofile.net/proofs/artist/44ad6776-a109-4045-91d6-52699b8a1bdf.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 0x57e100f759a087e0dd44d93cd2921d5faed43db8bb32469d4e5eb7a6b9aa6a6e. Chain 2 (Bitcoin): anchored in block 958776 (2026-07-19T20:11:59Z), 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/TCAER2094966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf007bc2c58ac586eebc06b891429d59c454aa89555354d1ff96e5747eceef65f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAEX2073524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d19c5e0811aea84ac0dad0d06a85151253752ee8f768510d85e79f703796fe. 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/TCAFA2081210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a0f0660d56fd0e8b7ec5b17efc66c772af18098255bf35470e7eaefe1b57be. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:54:26Z), 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/TCAFC2051527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7928065bbe20f6afb3bb076803451a083d789443b71e73ff1c25b592b98ea2de. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAFG2051124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931382bff115a91b45aaa59ba8901fa69ffac2a028bcba14105c68c5a5c33936. 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/TCAFM2134053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa32f8c942ffa79f0e8c30489f8f56d78e3a71fcc4f45657135a99b4e74d8aa. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:11:33Z), 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/QZZ7L2532328.