thumb|Alvin Curran playing the shofar in 2009 Alvin Curran (born December 13, 1938) is an American composer, performer, improviser, sound artist, and writer. He was born in Providence, Rhode Island, 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43068fe7cb903ef0ead314eef2c161a08932183aca12bef147f34cd52940b74c. Chain 2 (Bitcoin): anchored in block 953617 (2026-06-14T09:00:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1b4c1ec0-d27c-4713-99b0-237f45fcf376.json and https://artists.proofprofile.net/proofs/artist/1b4c1ec0-d27c-4713-99b0-237f45fcf376.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hope Street Tunnel Blues: Music for Piano By Philip Glass and Alvin Curran
Knee Play 4 (from "Einstein on the Beach")
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 0xb77fac4bc787f660c3e8713e07e19f7a7bee6efeea2d9931936bc2d0d1711d7b. 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/USA220710011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8e3b66ac12a7d1f50139552de9231059a32e90d51524cc8f1aaf037d2089de. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USA220710012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2884d35f473338127612b36b6720524e5e3d28ff159dc9133787239309a31c. 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/USA220710014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242aa6ff4b0098fe72ddd5af55e44a5c63f5600021468def27e0a3675dfad9fa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA220710015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815d387780be72043b074f2cc340154c56587b9a498d0969cf7ca4178218e2f2. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USA220710013.
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 0xcc220e7e135dc84f3112a878e842022b56eb4bae7b79c03e9f9039ffaf0f1320. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA220710016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89ae83da3dcf4770e9534f2799e55e722b4d9b58c47207dae3116ac72fa7aef. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US4QP0867501.
Dream: American Music for Electric Guitar
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4e554c51eed25b4cb5690a1b655a7f00e86ad5dba6d2edbc1904899d6131700. 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/QMDA62450289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9789b886e46607917769b1fa4350d2a0207d70d97b0ef0bcdaaea9012f0a8f. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMDA62450288.
From the Alvin Curran Fakebook (The Biella Sessions)
Toto Angelica (A Work Made From Selected Samples Of The Recorded History Of Angelica 1991-2001)
Segments_POPtraits, Vol. 1 (Contemporay Music Collection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3417c3c9f7cef1cdc50422fa489a904092fa340be56d8c4e41d84894863d5b37. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US4QP1071306.
Songs and Views from the Magnetic Garden: Songs and Views from the Magnetic Garden: II.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1d483e42f843affa38f88435e957c93726abfee165dd6c2f8958ef546cf0d14. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/US4QP1071302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x788a6c773e228a7b900a982da928f840a008111aadac2bd14939e8d33ae76aba. 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/US4QP1071305.
Songs and Views from the Magnetic Garden: Songs and Views from the Magnetic Garden: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680f5a70a303ac2d0be53e8b875afe96d75e32ce3d51972d4588606efcfee24c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/US4QP1071301.
Light Flowers Dark Flowers: Light Flowers Dark Flowers: I.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd411f28387eb623c097de6b6ce06742c316d3d28b18e6237d0f321b799087fd4. 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/US4QP1071303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01dfa55e1426ad20519f233ac584781c9c2e3879c8951dbfc5420ee83927c12e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FR3200405605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752012df223d3efc32fe5200ff94d728511312f92ca66afd2f07530d5aef7188. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/FR3200405607.
Curran: On Hearing the Brooklyn Bridge Sing in Yiddish (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb0ae59c883659ee4a8671e2c1593e6cd7d1cb7520a07e63c5def735baf8f0. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USA560936826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260288c54f323cb571279812735b6efbdd193dbf89aec60914fe2e19671be0c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA560936834.