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 0x3f4b9310250385cb3cce346e3b970bc516b799f808e524c1a129dfb75ad9d2cd. 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/a238ea1d-8839-4ac8-850c-69d8bc1736ab.json and https://artists.proofprofile.net/proofs/artist/a238ea1d-8839-4ac8-850c-69d8bc1736ab.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 0xa098e6d388b3421c46cdc5c906f1e8b35bce90483fe797b49c97d2a18c2b86c4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZDA62074486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc98c2a1d70f1471e4d952d4272ba0941b968e110c6cddb3799c7408cae086be7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZMEN2093500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e371dd8e2b009945aa4cb13a808fb11c3918ed7c77e800713502da637b326f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZFZ32113868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc900ad4f42939e227820ce619f60a1b5c740732e05615584823ee077f252d8ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES64E2206023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94f9a675564ee155659814fd80e5c36c6bd6ed3dbf3f5c87e21be9f254b1e43. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:57:54Z), 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/ES64E2506326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a60e5cd1f7b589428239bd8570b1178dedb28cdd2c269c2dc6b592656981b5. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:18:44Z), 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/ES64E2510253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379a4d9c9eebff7e740155f7e276dd2c226979f8829adbb6af939adf5caa2d03. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ES64E2512759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e23c7fce7c929892ff94b763f415e296f147c180d1da0681654d35880015327. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:22:16Z), 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/ES64E2514958.