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 0x1ed0bbddc55463c38398b2667e0f83d29bf5c755015db1f96317fe7a0ce7d3ec. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b825ae9e-d4a4-4b8a-941b-aebf9af40f53.json and https://artists.proofprofile.net/proofs/artist/b825ae9e-d4a4-4b8a-941b-aebf9af40f53.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 0xde37da1fea2e42b5345156ae53b91fed6e44f919ba00b0467dbf6845955493d2. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:12Z), 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/ARORT1900046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ce0b3f0d640d4aa576ca0a85e460501f2fcdcf8f5d90a8f76b3d58094c5745. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/ARORT1900047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0651ddcd716c9e514161e8d7a925f1c629ab806d286c87bd81b83ace1d847692. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ARORT1900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6818573d67d0ecaf39545459f6eab50990dfdcebc991df66ee0b3fe827af4802. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ARORT1900049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf33fc40c08495b1bf3f6f3193c2ee4fb1c868bcf6cb08e7bea1c663da035c3. 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/ARORT1900051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6fe00a27b4aae922a7c6ac1d15f3a91e6ca9d5c90f507e57828cc4129abc6e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ARORT1900055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e401766d688e7a7db0e8503dbef318ec90c2f693b2476e72908fd7803828d1. 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/ARORT2300015.