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 0xc102134583f67aced3281faddf4ff0f9ec9b30a7c0fa173aab0b83f96ba73071. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8f9c4f4d-bc36-49ea-8905-4acb8a6b9656.json and https://artists.proofprofile.net/proofs/artist/8f9c4f4d-bc36-49ea-8905-4acb8a6b9656.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 0xbb454e3af05e1211c8658d85868bc426927bc1742ac0430978edf1d2786b2d6d. Chain 2 (Bitcoin): anchored in block 959011 (2026-07-21T16:19:59Z), 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/USDY42052561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44350fe9e67b1e84f686ea8782525ede789ed886eff2661d4772f41d426b1f69. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USDY42137342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7344d99433628cd79d2b3d1f5aa99693946e6f521bd2c5e3b5f22626e6fc511b. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM92128788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x778ff7de8feabcac1093cab7aca8825a41e80c1c5ed77d1d1fd27bc8b5cbac0d. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:02:05Z), 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/RUA1D2448411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b1339e7b00052101f93b6125704e3236ba8ccb36cdabe05f64881df4d1381a. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/RUA1D2448413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fb1a704a6a6ff3f499c7846267f9930fdf92d5f7f7c04e65beab743bafed01. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/RUA6Y2510984.