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 0x45f01c06e86d85795d68326c9cef0775ed862e68e32e5237fad52fa716c6b346. 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/b6f0fef2-3576-4a04-8894-3dace14e697b.json and https://artists.proofprofile.net/proofs/artist/b6f0fef2-3576-4a04-8894-3dace14e697b.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 0x82d33f50ac29c403573bc1c8f10f5be0e048d3d7381b0e44c3260a718cc5ec33. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMZ92365024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48af71608628d76f0cc2bc6cc3de5f87bc350dd777e82cdfb41b4cd8dcc0537a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJY2450723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e216d415ee281abfcefd42c934f0388b42bd9907337a00e49ef543a9d815cc. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:32:29Z), 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/QZNJX2431693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93128b618286ea2f7ff9c4479abd0d525590cb9b73f4ead0ef685d71577bccdb. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/QZW9K2410716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x807aabb90edbec54f084eb10c7a62d6a8d7c32f09e992786e24c81c0553e95cd. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZW9M2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65157cd049de7ec4faf21b68989c5a5ba86a806298ab6746855fea3670674927. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:42:28Z), 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/QZGLM2595723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b6f4d415bd5ebac2541be8f79280c0366bf47f2f99ed9defa408b5a6e4eec6d. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZTPX2555863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37accc4399f26929aa59225613cbfceccc8bd0c60bd9019dec104a68f4c26143. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2591644.