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 0x8819dcc510aed6a04e9384c67d6949ecf0364cd06c5091e15b2916d661a7535f. 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/a905be55-8761-45f0-9eef-bbe86a8f7506.json and https://artists.proofprofile.net/proofs/artist/a905be55-8761-45f0-9eef-bbe86a8f7506.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 0x6b3b0bf3722fb435974b1bf71cd37027540cbd041cd44c66ed51c5e56bc8a52f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM82252077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa19b986e8012cecefc4e88513fb5aec262fc778f0c7409bbaf231f91c291ae74. 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/USHM82252079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17a27b5cf9d5a268b0b14a574fcf4b18a1105160bf18b3b08f15b656b0967c5e. 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/USHM82252084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6818a62d7a836c38c64c3b39d16451851a41f01ae991ff4b636a1ddbdeca48d5. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR2X41586820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dc8e4f25d61dea6c4f7daef0175963c13aaedf15aac6f004f6345f1f7d4d90b. 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/FR2X41586823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4ad3e48e60fcdefec0dbc6ebea6f36bfae642cb6fd6bcf45c122a6b9893cfa. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/FR2X41586826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f99cdcfdd3a7cfd88fb31d2e195c569d01bbb5a361e428ea63292b6fdc072c. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T12:33:50Z), 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/COA6W1801270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c244f4b8bab6ef9e781c066aa462216cd8f42b60411df36d2e659047caf6fb3. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:14:30Z), 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/COA6W1801272.