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 0x187105836084fce75f0febb823dd37a1447a9d045fec9c92b3052fc817848f51. 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/d17b2434-68d5-467c-9947-47148ffe02aa.json and https://artists.proofprofile.net/proofs/artist/d17b2434-68d5-467c-9947-47148ffe02aa.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 0x36c08562f1a9c05e15de332203d3f76794adb14d9a6b24a5de1c2ce81941b450. 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/QZHZ31961133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d75b9d1445b660edb1c89510e9913a0ba7018f1f34c33eff49aae19dcc71cd. 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/QZHZ31961135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4774a41ee3f58e0711610e7dfd5ff764b285eb109ff4143005a038da6207d197. 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/QZNJV2110415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f87f7c4e672ce83fbf6b4927136f7707150ce9adbf477cdb60de0d32baba117. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJV2110421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f52c048d6caed86e4e4853f09a72bdbaef6302339ab81de54d4c0d7437383a. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:09:51Z), 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/QZTVM2268772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c7d009144dcd2c5552c5387236bcc13dc1c1d36146aa720b6213813cb59ab6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:12:37Z), 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/QZNJV2362582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04a1d5d8311fe84cf3f94739a6530686f85352e7fe8615a900bb373d3768ecb2. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZNJX2418841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c7d009144dcd2c5552c5387236bcc13dc1c1d36146aa720b6213813cb59ab6. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZNJV2362582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f52c048d6caed86e4e4853f09a72bdbaef6302339ab81de54d4c0d7437383a. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:03:53Z), 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/QZTVM2268772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f812cf0fd80756a850339e6759796f8f70e6982702df3018a8e61ab40910f9. 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/QZNJX2418846.