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 0x855cd990214515ab761f04886fc36334c8251fceb57b72b09a29c09c89afa2c6. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f9a84c7-bcaa-42f2-8c05-7d4036ca2ef9.json and https://artists.proofprofile.net/proofs/artist/6f9a84c7-bcaa-42f2-8c05-7d4036ca2ef9.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 0xc44a774b9556fa1e49abe357072ef9099766192ef2a7a3b5cba29036569b8c48. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:04:20Z), 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/QM4TW2434514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3764ca9f39d591f8d471a2dab4ee5ef5e45b16db94abee29e69207e775362ac. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:07:01Z), 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/GBSMU4061151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f44192186109201fb43e3ee8b7a307ed18bc359fc99788a036331f0a5633f1a. 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/QM4TW2438970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f779e39df1c6e37374f8e9149dbd3cfca555ffaa54bf4a0c66583792f6df4d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR10S2387480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac3b4ab223214d618d9ae3e51f8ec60a0b34a5d99cd09d5b310a30a1d2861b0. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QM4TW2447980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30fc1554a62fb623c8a404a25a41e89756501d84d3c0dcf5cf205498d3157705. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:05:19Z), 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/QZGLS2431873.