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 0x9ee1ab3927c4ba77019213db7fecfdacf9dc20998e7337e733cde3b3216a8c28. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9c1a2de-ba95-4851-bce8-d04ae7afb5cc.json and https://artists.proofprofile.net/proofs/artist/f9c1a2de-ba95-4851-bce8-d04ae7afb5cc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
BASE de BLUES en LA (A) - para IMPROVISAR
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 0xb70535b0cd97b4d826846e15e7a6ea5e16c324b07fed9f4f6be492d9896b8c39. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/GBSMU8195514.
BASE de ROCK BLUES en MI MENOR (Em) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6a89e46ce6da1638e63c118826ceec5df9ae041d1ae1db8d2c0e70fd671864. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/GBSMU8195515.
BASE de ROCK FUNK en LA MENOR (Am) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd34f0cd3a7331dbb56fddfc0ac566af9d69e313726ed302ec4f00bc35bcac3f9. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/GBSMU8195516.
BASE de BLUES en SOL (G) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019b5123a32551ba733ba83cf9c57508b05167e09cf7ebcfc9a12c951010081b. 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/GBSMU8195517.
BASE de BLUES en MI MENOR (Em) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07bbaa064f6c2f97c8880c06af1e71d41a47e5a011cf80d3a90058f75081ee40. 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/GBSMU8195518.
BASE de BLUES en SI (B) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7a62cfc5baa58fef63337b61489ad895829483da8bb70a04d2033a76314e4e0. 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/GBSMU8195519.
BASE de BLUES en FA# MENOR (F#m) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad86690ea8b1b11bbebf166f85484c5128de1b6ef86f79fd2901d4ef62becba9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/GBSMU8195523.
BASE de ROCK BLUES en SOL MENOR (Gm) - para IMPROVISAR
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe09cfe336043d74749fab928259c65ff96760aade3c46833d1c30d20549eac2f. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GBSMU8195526.