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 0x3a14754278e38de15d87b19113680c120bd58ab9aabea9d1a4b77e30a14d985c. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/01e60c42-93a5-45bf-a3e6-c474354cd0f6.json and https://artists.proofprofile.net/proofs/artist/01e60c42-93a5-45bf-a3e6-c474354cd0f6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Sin Fronteras. Mi Tierra Ocobamba Huayno Fusión
Homenaje a Picaflor de los Andes y a Flor Pucarina. Huaynos del Centro de Perú
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 0x0b6f1eff558007d748c40953f1725c57851ab91e19d63d4ff3a191cccd5882af. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/USHM22064028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd897c2cff0ae7bb16baed52842305fbf280342bbd1fe4a5dddfc2dac30711f. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/USHM22064029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4df2b2524c0c4e50633ccbeb304fb6283995f507d527685cc814f2151ed9103. 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/USHM22064036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf52f7bd281b9ead10a90988ff4d25bb49b8945fb990c16212a18f16f29b78dba. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM22063403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4549ce88ffd05a97484be821ddb4beb7861e73573e99168ad8cbf9f6c9aac468. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM22063405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1965da1cab7f600ed6fb7282846dc5405ff28655ff7e96d18c045eecdbb66e8e. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/USHM22063407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651416628d5baff9233ba714bc8a5547ba070dcbfd7a98febfdb2349b9f51308. 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/USL4R2058437.
La Tradición, El Futuro de Nuestro Pueblo. Huaynos Clásicos del Perú
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2dc52391490c10a5ec2280c445ecca6d7551e121e558daf76b93b0aca87068. 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/QMANG2207979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a228ccd38a365b467d5af9f6e04f115b0127e99daef5e36770139dd9b2843f. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QMANG2207980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd87ec5b78d13bbb676b294a4bb65aa5e7a3a3ee4b3b9e3965567671843a5d64. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QMANG2207990.