Anthony Braxton (born June 4, 1945) is an American experimental composer, educator, music theorist, improviser, and multi-instrumentalist who is best known for playing saxophones, particularly the alt
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 0xe30c3dc8b5d41ab1007655c218705ee0f38d62fe4867409c47c92d5b6c80313f. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49e49a2-2b73-4194-9980-98c6a94ad53e.json and https://artists.proofprofile.net/proofs/artist/a49e49a2-2b73-4194-9980-98c6a94ad53e.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 0x081fa0447d9c201bd40baf535192d4aa7669d40e83b59e06514db72e4d53c9cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CZDB82300001.
コンポジション I（タウンホール・コンサート：パート１｜コンポーザー／パーカッショニスト：ジェローム・クーパーに捧ぐ）／ コンポジション II（タウンホール・コンサート：パート２｜コンポーザー／ピアニスト：フレデリック・ルゼウスキーに捧ぐ） コンポジション
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5ab337473d1cfdfaa3f2968074a0b18f6f329dbc0b3fae4c4b2d56bc631765. 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/JPS801945027.
The Essential Anthony Braxton - The Arista Years
Eight (+1) Tristano Compositions 1989 for Warne Marsh
Braxton: Duet - Live at Merkin Hall 1994
Gtm (Outpost) 2003 Composition 255 & 265
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d4048611dddce440414896922f67d4fdd4469f2ad04819a70212f4711e0ccc. 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/QM6N21577520.
Knitting Factory (Piano Quartet) 1994, Vol. 1
Compositions 175 & 126 (For Four Vocalists and Constructed Environment)
4 Compositions (Ulrichsberg) 2005 Phonomanie Viii