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 0x600a175ade4e48f99f313883a2d3b270dabb58778bca5d5e31ee4fd72a838bcf. Chain 2 (Bitcoin): anchored in block 954553 (2026-06-20T11:51:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ac28d561-0a56-40b3-9c1a-5c24050e5ff0.json and https://artists.proofprofile.net/proofs/artist/ac28d561-0a56-40b3-9c1a-5c24050e5ff0.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 0xd496ea74e98e40f17da3a1ebe98b271b887d716ebce3b5c925d32351f45fe6cf. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/UKXN22552262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c49cb337c1e9498353ece6e86a2673dc99d90b5b9c2afacd685bfe3698de588. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/GXHG92508584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7780f3338d1ec969ef0d08dfc1ff7e0feec0ecf29cf8f12375d690123985b913. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/GXHND2515704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d117c56886c52620c0f6cc106ca29f6221a6cc63019b6460ed87342c9044ba1. 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/GXHND2583285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a84f7f1abb3501f23845c439564876e97c58ba44b125ab0dbf1efe7fff9f956. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX53U2642921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94abbb875ab64f014bb11fd86a384e745a11b3ea2a3190903f6d6424ef551fa. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/GX53U2686551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2d7b2a41df273cff77952d38c405854a441361c5e26d941d5f0a53779033c8. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:11:49Z), 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/GXHUT2535081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f844d4c3f695ce074d646c3ab7908ff9ae326462ae38e85cf16e7cc525876c. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:49:45Z), 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/GXHUT2538130.