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 0xe9bf3f58efddfe878f6ba790e420b8f05d5fca2af89f3b75d08e4f0d5a960989. 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/894dc987-f0e8-47ed-bb01-f8338bc83ebc.json and https://artists.proofprofile.net/proofs/artist/894dc987-f0e8-47ed-bb01-f8338bc83ebc.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 0xa6f1907fdfda13337e32b4a9bffebcd526e0bd2b2692a22ec0ad1dd31a3fd9c9. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5FN1852776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82a64c383c8abdd9675786f0f6761633d18cafbe70dc1675d1ba74e1e95001d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ5FN2238820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e7ce40a2ad11f6f248d1fa2ff24bd908ea238f65ed5b612c69a22c47cb51b6. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/USLZJ2212391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b32ea8778cd9f2a64fab15c8a3f6f0e8907db92ba1c52588b7a7ab7d151a11. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USL4R2382372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e9109ae867ce45273a6bd4a1c2537b7367870d37ff5d9fdcc4de5e6d79dbbf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:00:24Z), 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/USDY42441906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ad417bf411da104671698be0eb4792dddece2d0dfb637acddf95669a260997. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USHM82449328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccd1b50d6f58cf09e092e38ee03a9c0ffb7540cace69da72523c0ecfd05d8959. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USL4R2428227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c080f450e659fde205ff71fb945d50fa15cd410ce39597e96e47da86199489. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/USY242426030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e840c29d3261c5bef6934cd84be0e67e07b2e92e290c11a2139c6a1ca7e36f. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/USHM92565423.