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 0x18e2eb5f05b2bbeef89ab3807e4f4786dbe62d717f579f70e6d6d38431fbab33. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/88fec443-ad4b-442a-845e-25befbcf3a0d.json and https://artists.proofprofile.net/proofs/artist/88fec443-ad4b-442a-845e-25befbcf3a0d.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 0x08ef16722b24cf14bc4a7ee55d09e160284c646b9100c0c9ae942ec65063b2cd. 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/QZHN42409413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e9955012df2d1a884deb39ca5b0a816c9a052be5d5173fc7186bfc166e05ad. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZHN42414642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd054fe0aa796e2a0e2a808956bee2dc6a0176211a0c07560202754c9691483e. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:55Z), 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/QZHN42419099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd054fe0aa796e2a0e2a808956bee2dc6a0176211a0c07560202754c9691483e. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZHN42419099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b7c1d48065cb5eec710c7cfc6e4b90a80ed2312f0360b1a04cc587e0931a779. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHN62505756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711fddfd2d39907ecbf566ffe6cc58113ea565e4fe6ff7bd49e374b4f2c248b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN62505757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d49762cbf6ee451cc07e48362ffd179e70ddc0cc1e747853af93d7169db0840. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:27:48Z), 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/QZHN62505758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfa4fbd79cfff901aa0a6266ff319a5d6065ac0a4c5c8aef77cc559d64000eb0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:54Z), 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/QZHN62505760.