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 0x2ea624f7ee590c6d8cbe26e9e177709e07d84b08bb5b4b58ae2bf15b67ba01d1. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe08e92b-e401-4ce9-bb2d-f3dc79c59213.json and https://artists.proofprofile.net/proofs/artist/fe08e92b-e401-4ce9-bb2d-f3dc79c59213.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 0xf2d0ed63e7e7a45c30efbcb4ce8deea692cc8fc425dcd16611196bcc7505d5d4. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:26:55Z), 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/QZMHK2525063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9cd583863b2c98fd2c6e650e8c860e61d43c83d16ad503149ea63715fa001c. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMHP2558744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb2a5fe76c3825f42523f523736355945d67c4751f7ad79c19e95fee77a50011. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZS642512567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2397f8cb7ae2ba46174a02bf272b3d3f050077574fecd9446128e0a8d3aaab25. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:29:14Z), 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/QZS642514850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ba5f8e5e2f6ec36b343b90c38d77ce078d5847e9f9a79463ba25256e14bd25. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZMHP2548385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc25f8b0a8a4a0ffe8727d02359d3ac3d3b0181d7d696134cd4e95961ebd45ba2. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZS642526464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc85b9cc8f6aeb2115225eadf1d2fa10070b27257dbdc86a6351a7b6f9bb3fd. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZMHL2552788.