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 0x8c5ec689971fcf3509fb1519426b1548c75934f6e97cec42a47c6a4e8151b19f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f2ab5b43-7992-41d6-a56a-a955362cfab0.json and https://artists.proofprofile.net/proofs/artist/f2ab5b43-7992-41d6-a56a-a955362cfab0.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 0x8591b595bb31db9df144f942d6c7a5a8a39cfc29ece9935e9456fa487772a43a. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/TR0510701960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7386e32ab89d905bda21b926703fd1c4ee04438eeb11cad77288f35749092649. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TR0510701964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd8ef7e962e07a18d5d4e7a6df1f35ca6e44613a4ba8e90239d08bea2e461e7c. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/TR0510701959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ef2d9e1fe003c0699b30903c075ea0664d14ee35d0e409fdc31b05f1ae0fb5a. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TR0510701965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea26cc65393fe6d4c87825a3e205319e80c2ebf90f08ac81b9687d44d0fcc2cd. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:42Z), 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/TR0510701963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21d0d46efe797e60c79819906d079523267d5d3000956815885b5592b573725. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:06:05Z), 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/TRBMA1801315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6449d0d62d86c51ad237855145dff5708c9cca5dc34a431efaa9af8b4a3f77b. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/DGA0S2478364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d099899718242ca5bceb43f54a27d75f2294b4f62e5089402673d9f4e1add49. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/FR2X42506781.