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 0x69bb84533918b8f0301b056b4193452657e3266385385d143042854232984b24. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da7c235c-a0f8-4e69-ada9-1bd086d98ace.json and https://artists.proofprofile.net/proofs/artist/da7c235c-a0f8-4e69-ada9-1bd086d98ace.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 0xb226664022fa8ca70ba1cc6000fdb1a424e044f8cf0c677b270d7c3691a04a59. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAC031913122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315d176a01cc341b95f7ab82c29c7b7c2da68b421e6b6546da8290e12f336414. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:02:06Z), 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/ZAC032002314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af5e31ce450dc28907062e3e56fb5d85ba6eeb366139747de13b8bee1920467. Chain 2 (Bitcoin): anchored in block 956405 (2026-07-02T22:22:35Z), 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/ZAC032002441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd93a78a10ab9a471750fc2d3878fe7537fae1c2eb57f8824530287110d955eea. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/ZAC032002442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38db48feb4d83cd7a0fae861163d0850f477a353dc24feae87baea9181a6f47a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/ZAC032002446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9192765406ff1f11e67db1f09ada34ae648e34e8738fa49a9007cfe79111d1. 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/ZAC032310609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf459a5e5d3371faaa4f08c846c678d7342795c66b63d9746bc236e3c99925bd8. 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/ZAC032310610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9479e7c8ec364e8bc08af06608213b40782dd4044c9a482dd9f944945ce1a4f2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/ZAC032308294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0137153773853a914856282f1054bb9b6c8fb80637ee61c3d9bd310fb12ea475. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/TCAFD2088551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeefea3f1f3639b5946aa1646035ec7c87be9e19cb47e2d7d3bd608eb727e8eb8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ZAY362000591.