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 0x90efdd6ee1bdcc76b3c118e0d58ab936633b925fd300c7db7dc0947d757c3ec7. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2cc09dea-ff45-4ad4-be25-5d2ce9f1c2e2.json and https://artists.proofprofile.net/proofs/artist/2cc09dea-ff45-4ad4-be25-5d2ce9f1c2e2.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 0xed01b87f31d5bfbc04b942a30bc586c6c06079cfa687d52eb076174e80800490. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:16:19Z), 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/QZFZ42203548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8672caad6f60ba93937cdcd5493f6ce94e496c602fd3bc689437023344cb9f87. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZDA52223106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94a7584cbaf571e236366866b4580af5f84bbe4e63c9252ca24257079021303. 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/FRX202449980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab5f986f564bdde2f5d9feafcec466855e25851537859d42af2325959cb796f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/FRX282458741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b6fabe0533c90a913cd16dd042f9cc803527f4e5abf997fba443fa1a1e46f55. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZWFH2443065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa33784a8008083ff8022847cfc8c58fbcaf980bf085933ad78698f285a03df. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:56:53Z), 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/QZWFH2450512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057dd303b3bae907dfb173406b0764ddeb981e47407f069d935ba379948e508e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:52:47Z), 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/QZWFH2450516.