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 0x672e822bc54917fff7978f5fd1113d23ffe3d24c34b54962646c05cf083ed584. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c1999b71-57b4-4a4b-a147-c63047edf95c.json and https://artists.proofprofile.net/proofs/artist/c1999b71-57b4-4a4b-a147-c63047edf95c.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 0x853d5a00ce32f10fdb21e88a1f844fd24701cc6e71353fb96dd166ab25cffe22. 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/BGA472426453.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9e7ad675e34b51b4d4d76d93ebc466ec7a3d7c76bfd74d3849907ef3e587c27. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/BGA472427794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6177909e584fa943a1ba3c7fbabe0af9adb3fe60b8372de2a534c0cfd5ff289c. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/BGA472427796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa705d0e14ceb4728b705fa29a9b9cff77c3cfae93c8fdbd63e3943e7fceda3a0. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/BGA472431636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f99eef2064e6919ce6f05bd74cb088eb3d05f0cb0bbeec73d0a61a30ed1601. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:45:35Z), 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/BGA472434184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3cf24dd1a0468a1ca8a9d6b0ee3d12ac2594ad572a66feb432c21c9136bb1bc. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:45:41Z), 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/BGA472513410.