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 0xd6322ed16553c41fd080e65bde55ef27b9e5dacfa267366afc1456c002e97f10. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9f960622-ef22-4928-820d-fb8786b50ed9.json and https://artists.proofprofile.net/proofs/artist/9f960622-ef22-4928-820d-fb8786b50ed9.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 0x1b1bdc4befa375346c4b14f51e28ad6d61ea08bcf787025527fb95a4d07a09ac. 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/USJ3V1365234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15d6698b947effaa5e53b4ea2a45996eee88ea2d53f3e20849a722c53e0daea. 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/USJ3V1365230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2de1d7c95930d8ff4d450fcd16a167d8a3203da28210299fe361976a0d23ce. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:03:34Z), 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/USJ3V1365225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2ff9106a538f8a2cc3e73c051f803d0251c126bb6ca780edb71668ededfcd04. 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/US7VG2287193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc082256b17ca13e1bf00786fd1683f30e52f6233b1d4a5cd35b4324a69ede731. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:53:42Z), 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/US7VG2287200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f70dc8a176b0a752e5f313458dc713c7ee87057628b120b0a2a01b56735d4d3. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZ5AB2296027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97c4b1c61fe75877151b46f8c4e2eefd86d755d76144cd8cf616c614d8a8187. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZ5AB2296068.
Sones Costeños: Son Putleco / Cumbia Kale
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb4687f1cf20c9f9efc54857c5ab24d3d9dfbb11e3a8cf4c6801a31f65726d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZNJZ2269758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39656b7d1b6e516ce6b88c896114f7c49fbcaab9fcaafd0960653ca7763a601c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/TCAEX2032725.