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 0xb211ba7f65d39de5f8be27681985ae2f4ff487417d912019c70a89117c3e870e. 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/42a98d35-dcbd-41ad-926f-4a44393f8e67.json and https://artists.proofprofile.net/proofs/artist/42a98d35-dcbd-41ad-926f-4a44393f8e67.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 0x3c1f59493dd48a4afe5ef56c77f5cf262127cfd28deb12aabfdafa37f7feae99. Chain 2 (Bitcoin): anchored in block 958143 (2026-07-15T10:15:04Z), 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/NLHR51139599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbfd3a11a94921c4cce1f1b0ffa023594d883e3cd744176f73b7f3edad1022e. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/NLHR51139467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd41a0256eeb12d36ccdda039fa58792b933492525fc9507e31a4eafbdb331cc7. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:04:39Z), 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/NLHR51139353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3043f8bfdc362b409003ed16b193e445894365c069359f8785d2668f0f6dfa. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/NLHR51139590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5fb1d92668fcacb035b1bd2f38f1c1975ee4e8261b074b08618fdf56452f7d. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T18:03:54Z), 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/NLHR51140605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd346991d943e13b3e8d46267f99e225a0c28a1beb5cb586f824c0c4c2454ffce. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:00:09Z), 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/NLHR51139479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c70b7eb301c314020d6077469700dee6a39ec75c0cb7319628c2d7e166934b1. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T04:35:57Z), 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/NLHR51139537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaef7363130aef51ec3ab21554c066acf91c47098fe5e22da8d256f0b650abc32. Chain 2 (Bitcoin): anchored in block 958422 (2026-07-17T13:35:31Z), 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/NLHR51139474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254a169c49c01accf8aeefef87e0ed3c10a96c75de9e6ccb52cb166b9fefd4de. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/NLHR51139711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90efdca302d03ada5fe5d537e9ae295ea62939cd729abe5a0e339865e37c13e6. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLHR51139525.