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 0x262e286bdf61de7398460f0ad5adb30130a2f82ee9e76e4b11cb47409888ecf6. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3348071a-5f50-4438-9576-033cd517ff5d.json and https://artists.proofprofile.net/proofs/artist/3348071a-5f50-4438-9576-033cd517ff5d.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 0x77a400446b7dcafedeb642a54ae05fe902ef514d91c1d95b891d3168870eea0f. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/GBKQU2335531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9292571c4ca9bd52999963203db8a0116b55a96270ca921d3b82750b922c1d34. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:46:49Z), 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/GBKQU2367726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x585877b3775b83f854eb0b429bc3d1da3e35331b81b1dfd81397b6ac02d855ed. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:46:53Z), 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/GBKQU2371197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b752d511fb5670f711d23ebb89be15ad0c9315ba5726bfc4b45383e78ee8392. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU2413001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9382f9a7bc464bbdb664322fd21f42d3b334cd8789fe6802e93897110afe3b42. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:21:02Z), 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/GBKQU2479397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5040f79fe352ffbddc01b38c51720e1a02b9101817731c8a568f345fd34d93b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNJV2552928.
CITY FUNK -Twilight- mixed by DJ TARO of Rhythm & Groove (DJ MIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d063d9b0fb17cf38b69f7fb3752b41a86b9615e738bf17d37bc585b056b7dac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TCJPA2445197.