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 0x0bbaa4a19964b0fee648ba357953f7e7649331a0785cf5a1d70eb88f10d623d1. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9e59d8b4-2c28-44b3-8352-b9b550803b57.json and https://artists.proofprofile.net/proofs/artist/9e59d8b4-2c28-44b3-8352-b9b550803b57.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 0x133b913d01e0ede293b0c00f10fb38e4d86b55457eba51c4ff15cccc37f3279e. 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/QZK6J2047483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0590d27d75204effc50d86bb64d717c3e5c5431f56ea87c8e0d8d53207b154a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QZK6J2047399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a931ade59f9a86ca57e19b672e16544e9275d06d784349d915e043238956e4f. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZK6L2014109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x890a55cbe8f1976e01fe9289c1528f63ecbb8e779a9a6506c2d3ad35bb4dbefd. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZK6J2047395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bee729b93344224808543b79f8dfd606580ae241b434bb2d96d4c465b18c71c. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T06:58:50Z), 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/QZK6J2049072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64291ebcdc863f9003c03c7abfc989e31a5a9c5d732a7c9825331749ff2dac6. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:04:19Z), 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/QZK6J2049090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1349311547c058fd8b0e5a7598df6d28f6c39da9103dc4c81013bf88c1b6e437. 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/QZK6J2047380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb868791e42a9742bb785da67dd2f7f3cd328a70890a912f847dd0e882653fd. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:26:55Z), 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/QZMEM2069635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c7aec8a9305a3b2fa8bfcc163b73505183ee19dd7b3bcd9727d6feee85f914. Chain 2 (Bitcoin): anchored in block 958965 (2026-07-21T04:29:05Z), 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/QZK6L2014116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ee801af4b1361ed2ab3fbcee735e8c1e2613793ab0241269bde3938e162fb06. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/SE6XX2598883.