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 0x5cbdca571df448477d062cc02c683a92d47d86759d068e209f9a72bf118ccf8b. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/250a182c-b95e-40d1-a1d8-caeb629df562.json and https://artists.proofprofile.net/proofs/artist/250a182c-b95e-40d1-a1d8-caeb629df562.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 0x4d2068c65fc623539115570974dcf01a554c3ad035f3f112fbb529d5356eaa1d. 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/QMBZ92346559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e15d880e89198fb8f988b33ec9a17ae187a8a5d2a70bca2e50ff295ad43ba40. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:07:10Z), 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/QZZ972417950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b0748373343226042434b108b515117ef4a2aa58dce9f7613f0b5111d3c12d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:36:35Z), 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/AUMEV2497293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83dd20ce591d2376d153b8b1f5f8368dd7fd801eebbdc455617106052e4856a. 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/ESA012589048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13376fae1c91d972310365bbddc4fe25d9e0f5234cd1e6b43ae53d24bad7b092. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ESA012589050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5429c8429f1991444fe2201e8d16cda830f8ed3017754154eb0d8efc8b3c814. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T10:49:22Z), 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/ESA012589051.