Marion Brown (September 8, 1931 – October 18, 2010) was an American jazz alto saxophonist, composer, writer, visual artist, and ethnomusicologist. He was a member of the avant-garde jazz scene in New
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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6de06cd6b9785501f854448afc879d2be7b62aad71315d4fa5583e674fabf8bf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e421aeda-e8de-4abd-9a59-42fb00e30cae.json and https://artists.proofprofile.net/proofs/artist/e421aeda-e8de-4abd-9a59-42fb00e30cae.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d66e68221125296d95229bed6389e362ddcc73d818c82c3318b589c8729069. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEB337000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f69839e2b86d1d0f898b1f745730f9ab8630aa908002e0471f968c7f4835f3. 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/USUM71113953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10f3d9e7bc27d1ad96ebba303952bf43bb419b380da01e80ccec833a30e11e2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:29:35Z), 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/USUM71516417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba1ba1f7972746a3c612a871fa95e679768ecc5a4126bf79d33b20dd4ab4c86. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:04:14Z), 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/USMC17553510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae573e5ff44937415a3bbadc1f9edc247cd110b91442154b8c43339e7795e6c. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/USUM71516418.
Geechee Recollections / Sweet Earth Flying