Marval (; ) is a commune in the Haute-Vienne department in the Nouvelle-Aquitaine region in west-central France. Inhabitants are known as Marvalais in French. See also Communes of the Haute-Vienne d
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 0x4017d92cf2c9e11cd8c714cbbc2749abcd731a935c769d3dcdf2e783da3a5ce4. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0b59eb6b-6068-4440-aa49-f508fa135314.json and https://artists.proofprofile.net/proofs/artist/0b59eb6b-6068-4440-aa49-f508fa135314.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 0x88d22d4a93a2778beb95e9f3ca26e52df58bb4516b1287dc780ac774994dab31. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/TCADT1891693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x540c45ceceef87c5b4e4a72fd6e98bdf3155419a74c17f39e50fe5145ff2668e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADY1823159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70096ef3729e860d260b079dee4b7a3d7546fea4bfdd342a0f287cca9aaefe03. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/QZHN51975122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb521ddbc37fdfd6c1be7cc37ec3c5f111fd9ddfd4b6fdf69c11eb7e41c4b69. 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/QZHNC1965051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4efa6deded2918cec3f57c2d7cc7df67ac6f855d16ddf891c595d966ce47802. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T15:40:17Z), 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/QZMEM2015667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a5929f8ca3c68cceb58a17ec3a68d1b89fd99871cab892eb4d3dddd7e97e489. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZMER2054938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfb998946ca4241855395c84e295efe1f65e7b2d1454686bd34bccbc3f7a8b7. 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/ESA011555908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b61c46f642952949e0428d268102d4b72380e11e5a608fa049486360ed22c2e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/FR59R2221052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daba60c0ab5aae087278d30621b10ba31825996f12dc9f251de042a8db4557f. 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/ESA012263354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cf127b6c9d29aa66b82a4673f9014a3a2ab751a80c19007376ee5bd071728f. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:08:16Z), 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/QZNW72212441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6ef0b3c3253691024c469d6c1df169ada43330bb6816c7efe2d57b41f8460. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTRX2319745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9dd894e81145bf99a9ec46e991153ce3f20bfa4c8827cf7747f0f619ceca814. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNJY2342915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0edb7e165cdc9e3634856192367a8fb3532f31c906721e38b47bfacabbdbaec9. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTRX2430080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd37edfdf493f61921b8d844714c15dd44a18bdbeaf6ffe81b34cd1ecbe854d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNW72368159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f688e1e0ccdea5579471cca5ce42f76bfddc5e24c3671acb0227f193a64709. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2447231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c815f8ae0e210b0aa9dcb066d153a301cee99bb5f424f6d373aaa5e55d68a44. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNW72205622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5de77e29335ac77f72e3098e9c7a1dba43e503eb655d7c6eb68f1d967c6cf701. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWDE2456013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0580bfaa7835accc9935ee16a627a7064f51001672303cbbdacfdc520032a4b1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWDE2450918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda6ef0b3c3253691024c469d6c1df169ada43330bb6816c7efe2d57b41f8460. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZTRX2319745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9f6f8703cdd6dc87e33a281b08241a59e1b24a173fd25851890d3536c464aeb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDE2451506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f30d33928e8d5e98915f349a0345e9c1c32741d0c391fd5b47b09f91c98ad53. 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/QZWDE2452158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44dd11372afb466a91ee6438e28fcdd1329ac349a76b7f3cd4a6ef5cdf49252. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZWDE2453875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2964f68ce3222dc8701c37530bb77596d91aa9b3bba2c6114a12ada2be228cd6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZZ8A2495915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x097698e3d187a667c84a70f63c7b8c2eac7947deb348f8939d57c8a113228f9e. 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/QZWDE2560134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68e455cfad86c97ed3bb5c055779cadd86615110f18f925092f3f0bd97ac5235. 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/QM6MZ2040813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896fa7c548e45e8ecc425005e7e34d10303bbee47061085e2bf47eb17673a594. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZFZ62209675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d0be0a714d85b6fd12d2fe2356258287ef789e087bd6174bb7a027a29ec5e8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FRX282271666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ed4bf156048c94c1e1f7f22a1200245627914e325bb40bde04d54f1c13219. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QM6N22080865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ed4bf156048c94c1e1f7f22a1200245627914e325bb40bde04d54f1c13219. 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/QM6N22080865.
Chicago X (Ft Neeus & Angelo Reeves) - Remix
Chicago X (Ft Neeus & Angelo Reeves) [Remix]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a71febc1d2703491c05764932e649ab44afe829076a3c66f4058266eaacba01. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4TW2242529.