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 0x3e283cfa049639f063590b2b3cf677205b5e12f907660169936cbb8770981500. 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/b5aab461-e7e6-4a66-919b-649a77c3f12a.json and https://artists.proofprofile.net/proofs/artist/b5aab461-e7e6-4a66-919b-649a77c3f12a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Son Inolvidables: Cheo Feliciano & La Rondalla Venezolana
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 0x3ef639749a4fb8cac2bd9696c07091d9eb9ebd0130c555da948cd8ca9108eceb. 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/US6R21304483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f96c05a5ff7f6e1fa93753c28627300394e8ce44e9fbc3ac30b7a7ed010ab6. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:04:18Z), 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/US6R21304485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa323c1de0f56c6e84a6011e30b76e68fd9260dedc75f355184dc4bbc65d05b3d. 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/US6R21304490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6398d86584bf01e910d941bd817f0a2a20e19c6ddfbc060efea0ffe6a30c641. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/US6R21304491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2352e8221dd8157f97bfef7382d66e3ead51867f3cdc97ca3b89ba67f799e4. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/US6R21313993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca52f43b6048273090a6dfb0526f680d354a7e0a2f4eeb1c4c220ab6c1efdf9a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/US6R21314000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0109d76b3a46e4158ea81e775656a98a781c1282e6eeab0561ed9f18e87f3a6. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/US6R21314001.