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 0x67670556c257b4b575e975a72e1e40105ca82d27fdfad83c457ef550d9ee5c3d. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/51e83c52-b002-4bcf-8354-cbfed2591d9e.json and https://artists.proofprofile.net/proofs/artist/51e83c52-b002-4bcf-8354-cbfed2591d9e.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 0xeeff1592f9097c5206bb5d6206b99e405845411d00f4823697c188941d912849. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:11:10Z), 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/GX53U2371443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefeac10a3432b793891199e274d540b95a7dc901b3b5015f781303a7397f9d9. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX53U2371444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f575c4944278fb2cef7423ebfca58e9a66e0a6fa56b56d59ac9509ad6eeab1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GX53U2371446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7654aed44d6e9bfadbd04a2cf19c661941c4b6eadc7bd3704749f5c26d19d4be. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX53U2371447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530cdf85e8683f136c0882515a0bd0b9e65f8ce12fb538d67e6387d0f11871d8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GX53U2371448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00184945a93fa6871c84cb44a3bb9dfa3e4b26c3561c9b14044805fed3b5af38. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:21Z), 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/GX53U2371449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf090db96bb60e9d15d64bccbedefe8318b86b3d37e492fe5ecba054deeaba4b1. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/GX53U2371450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6aaf2579d1ccb1f6540caff08f3a22f882fd34a4ebc0be303ba23cc3293526. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX53U2371451.