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 0x750b547d5a9a89ae7d2f039f8961bcb96c5ab8a5a53c4d3ded328f380a820946. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f9cf304-fd2e-4410-a125-ad7a8a6ec1f7.json and https://artists.proofprofile.net/proofs/artist/4f9cf304-fd2e-4410-a125-ad7a8a6ec1f7.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 0x007f27ce216bf110259639b8f4e35fff0accc7ad6dbbbcd1430919f22d262105. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATBV01501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x007f27ce216bf110259639b8f4e35fff0accc7ad6dbbbcd1430919f22d262105. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/ATBV01501001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8843bc6861061a9aa3a67ad1f8b0425ed44504ff4c17a4c0394216049502f73. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ATBV01701001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ecd9973431bf85a27748fa1a292849c7adb18aca613422a27b4f37073c374. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:26:16Z), 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/ATIK42210101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a82fe121bbb145d450eaff643af417ecf00d68f2326a32356b39c2d948d0397. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/ATBV02310108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36ecd9973431bf85a27748fa1a292849c7adb18aca613422a27b4f37073c374. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T03:10:49Z), 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/ATIK42210101.