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 0x2220839c399a698ac3b1a2678eda023c7cb78a47a0f6216f79d759be5aca0c3f. 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/9dcadce8-f25a-4d48-9d78-66b02026c374.json and https://artists.proofprofile.net/proofs/artist/9dcadce8-f25a-4d48-9d78-66b02026c374.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 0xab3c40424358c3f0753266ff9302cba2b36b8fd316deca1b1fc08bddac1fa90d. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:27:13Z), 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/QMPKX1791044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b8dff5f78fc342b44536a7d8fbbd1b410a7be2bf1ee3da36c111294fcec1d5f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QMPKX1791045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596d28bb0d831a0d6f34424872ba446ddeb061432a7daf3bc5e8426ccf83092a. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QMPKX1791046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002a606a1ca523462e55bf7dad5ab32bcbecb6c6f5f33c44cc3d6500f624e7e6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:03:43Z), 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/QMPKX1791048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd84d843b7cf849e16a44fa0071bc74d3a5205bcb6227bda8a0d87264e07bfc88. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QMPKX1791051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11ea1fee7ea793543e92792ea8c78c4bd30e6f8803b54ab7da1859d1e51e281. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:00:34Z), 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/QZFZ31933473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358864eaa211c67cb647fc228e502fafec39ced2a226e7dbb098fa52cc8f1f42. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/FI4RD2100008.