Marta Gabriel is a musician from Poland. She had a long career in the band Crystal Viper, and recorded a solo album and an album with Moon Chamber. Music career Marta Gabriel began her career doing
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 0x7cfe1b8d7344161a63730f306028bda7055c97857216125459ecd3b994f7f586. Chain 2 (Bitcoin): anchored in block 954062 (2026-06-17T07:39:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/45ca0a44-4f35-445c-9285-19ebc76e9701.json and https://artists.proofprofile.net/proofs/artist/45ca0a44-4f35-445c-9285-19ebc76e9701.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 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 0xaa4ee9660808ca67bcc848a8df5db2292ca3fee115c39d642da1742f7a0f24c1. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/FR1PP2100260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a56261ebf29bad9808514feb69e6367cc47381afc633652ad814bdcc68dcaa. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/FR1PP2100270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x642203c41687a8c3a9480b042ef00906ee0bf1f87c20bffb88c7b0e3dcce4e62. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR1PP2100280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149c44be6cf2c02ba392eeee3d8b5b1a72aeb9bf35a549e6dcfe2e0761351b1e. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/FR1PP2100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b4d7cedb22daeb3f7e2afc36396ecf9b3c44ce141bc24ca5af5fd25a115924. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR1PP2100300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50dc3242b511a6885289cbfdbe0d713f36f0d6305bd42c997c58993aa6263dba. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FR1PP2100310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1726e0f6bb0ca10dd857ee84c7e6dcdb39d13328909bb3ece49a21c68c43623. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR1PP2100320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc395632a9e66d1940d2ca4a5aee5b95a718386342ae421f66638d78cabcb9d75. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/FR1PP2100330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bd21915ad50c250ab2717c63d00a560bf632befc2805658c2e44628e21bdf62. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR1PP2100340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5307b5aba58d3f53eace2c65dd3ce8406f522d429beaab7d81c5210ebc89f92a. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/FR1PP2100350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79229f49a3a00d82e3c84f7332f95774149be9c172d4550d63aade3544ba1dc. Chain 2 (Bitcoin): anchored in block 957246 (2026-07-09T01:49:50Z), 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/FR1PP2100360.