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 0xd65b662c01f18f6179763cc08f57db7826158cdccae6235d056cc01b07a4e706. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/10ce875d-794e-44ef-bb50-713384ffe01e.json and https://artists.proofprofile.net/proofs/artist/10ce875d-794e-44ef-bb50-713384ffe01e.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 0x40e0e586597014f273caba16e47db4967c2f81b523b5d5355b17da71f4e782fb. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T02:14:00Z), 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/SE6XX2316829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfa815a6c9dc0c9677389db16f9bbe2aef4fdaa2daf7d182a48c44cd0a5b7e2. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/SE6SA2290934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf094901630cdf1e57aeabce8ed4a80c69c064bd8986dea4a86661624b81d2746. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE62M2364647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabcde6f3b262158c57cd747555ff219bff69635c26baa806fea8b55a5ea08b17. 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/SE6I32478668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9044a4e35039858b09936af8b88e12ef80b9be88a077e106231f015af5c54e5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SE5752466837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc5573f1a944bc0090bf4739185278e2ad5908a1381893c3f5baa5f63b27b34. 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/SE5752426182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dd0b3c872e259de5990ad3088f4d9fbe8653f77d491ba67dfc1aea8733146ff. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/SE6QE2466651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fb6d515fad675fc37102d70f13cd6cbc53aaeef04e32d3e1e2fe9a9e238649. 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/SE6I32401007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2774114f830d3f411a5483c05e07d63bacd158338fa10f2061a77c0a87c193. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/SE6HN2428510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47c89d9ea55eddea93f2be4ccda4f09aa2a21e7542c72cf3476284af3526f81c. 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/QZAMM2283871.