Bradford Alexander Mehldau (; born August 23, 1970) is an American jazz pianist, composer, and arranger. Mehldau studied music at The New School, touring and recording while still a student. He was a
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 0x5362f9088cbc9d0181b3ae2f50ee9a656f38fbcbcc16e379e9ee3a8b45e3e12a. 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/5feae021-efa4-43a6-9be0-42604af1ddc8.json and https://artists.proofprofile.net/proofs/artist/5feae021-efa4-43a6-9be0-42604af1ddc8.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 0x4b9cbb8b088b11b2d87fe773635bb00b7e5dd5f10d3926f016e215c5be2dce8c. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/GBRKQ2260780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d69fd7f0f896dd2a116eb35090b1c2a42e26ab7417eebf90c096d045f5396f9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USSM19804929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9862f171253e9786e8be61501dac9d3e33a4691073cf4a5a0394105e36cd7750. 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/GBF071401640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c2e283b00468f987b0bc9203d56d32fd5c51453d75a5adf9b73f7454e8fc9e1. 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/NLE422303501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf1f2baf8b6f07e4642ebf09538209ec245146b661bf1d527271402d3b0e8605. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/NLE422303502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbad3fd263ad26d4f2ab43bfbde32c0f8f475c0072122a1f60bb9e5899d8bf764. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLE422303503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe115693b5d726f9329fac9d00645a080064c5d946b6bf3af24b7a2bb9ab714db. 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/NLE422303504.
The Folly of Desire: Über die Verführung von Engeln
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17f8764dc8e1705c7ee354729c89e639b921eb3bd7a7b90cd0dbdd9619e6dca3. 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/NLE422303505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51428dc19f690ce4abd0174b2886449708c21f961da7bac67ef5458965b6e439. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/NLE422303506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c8ecea370966ddd2ef84f3635d5550e8c4741c450660c5129c713fde284d13. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/NLE422303507.
The Folly of Desire: the boys i mean are not refined
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb436db6237aa379e3874fae7f37f58d5400c3d0f8a7507804e23dca5e62b53a. 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/NLE422303508.
The Folly of Desire: Sailing to Byzantium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9a55187a61453a8008e75d0c638207df7f5f7b0b2a1d5706ec3ddee1704d15b. 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/NLE422303509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee206b0fc9385596815bf67102d1c0839b9f611a1e6fd0c28e394b8e1fb0fb4a. 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/NLE422303510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d9702827e56579043fe67414045b4f55a8f7952b544841aae051b3161444af. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/NLE422303511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae7f726ae543c9e4ed77e33f7d0f44412ee894d43e8b75635c519e1c1c6834b. 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/NLE422303512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c41820ac43ee01c1c7333ccbc2c96660c49b799795cd6a56e62ddfb533878e. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/NLE422303513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb816602fc3f2ec2069881864a62d3c73334d2be0ff00a18ea530e9ea6425e9. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/NLE422303514.