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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83df22566b2233ae8b1b0f48012e151e9f1593557d45e8bd1d5a5ca739bd7d3c. Chain 2 (Bitcoin): anchored in block 953707 (2026-06-14T23:22:21Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7d21ce64-bbb9-4aa1-bd3a-f1807d01c57a.json and https://artists.proofprofile.net/proofs/artist/7d21ce64-bbb9-4aa1-bd3a-f1807d01c57a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
No Te Di Rosas, Pero Te Escribí Canciones.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a35063c77c765776f7bdb836582714cd398c7f643f4607796f5d0a6ad08c9a. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T17:39:36Z), 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/USA2P2128693.
Desperado: Un Tributo a José Alfredo Jiménez
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb00841da96914d965ca80392f87deba705c3c046689b10f27f451dd8ffb6e71. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:14:51Z), 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/USA2P2225730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3142fccc99ea206f72593853bdc0f99ada2f0e04221472e5e246f672bf3c6e2b. 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/USA2P2241408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d48a4a2e31e7e93cf17c1f9e600b0ce18b8bc20d9baaee085cce6bbaae7bbca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USA2P2246905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a1456ef4f7a1441802db5845e6e966c437165a6f113abc910280b20506a14b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/FR2X42105770.