thumb|right|260px|Nguyên Lê at Aarhus Jazz Festival Nguyên Lê (Vietnamese: Lê Thành Nguyên; born 14 January 1959) is a French jazz musician and composer of Vietnamese ancestry.Dominique Auzias, Jean-
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 0x300310f5cf6022e2ca3b066ea467e116db2925aa0d5f8569600b9718ce7aa669. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4f05807-e466-4b3a-bbff-f2cdd2844fb1.json and https://artists.proofprofile.net/proofs/artist/c4f05807-e466-4b3a-bbff-f2cdd2844fb1.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Bakida (with Renaud Garcia-Fons & Tino Di Geraldo)
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 0x9a4e7c1dbf0dd61c07475faf8f2cf752f6bcebc6bacbe9d5e7f42a92993294ba. 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/DEA899901890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e5b81538ae349464313499ff22aa412cddbff7792612b5227b13be154a74ab4. 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/DEA899901910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d507956957392f36eb76ef70ad165ee2f0148063d79a600858a852901df04e6. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEA899901900.
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 0x8e91f1c3c298ab1c7a00e81c093c4196f7cf15918eb85b080ef71308022cec78. 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/DEA899901950.
Purple - Celebrating Jimi Hendrix (with Terri Lyne Carrington)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cfee98882f4e872c0092321313462d85010a8e5d229d9476ed74da762dddac. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:56:22Z), 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/DEA890210274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340778691bf22083e0bc0dc1c657a37235e841003c389b23faf8d0ef70c5f447. 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/DEA890700271.
Celebrating the Dark Side of the Moon (with NDR Bigband & Michael Gibbs) [feat. Youn Sun Nah]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1466e8581b5718d7ca5a7fed5fc9f96c5a09f9921fc5012afaba7851bf5c50a8. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:56:42Z), 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/DEA891700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d1324b0b959b46ecb529daff2c8cb2163e4512e60c21ef2d0e2e6fcb3dd43c. 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/DEA891900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca900f8a337cb57ee02dca2d322990acb7d5df09ec116bed0104bfb8ab94d9d2. 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/DEA891900048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d28679ac5417d744844401580180bd768579021b09cdf2922c339e0f3122fb. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/DEA891900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c3f59ae4c82540bdef0b568ae23649c0fd18454e40d9a0064ac914602295998. 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/DEA892300050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadac496e3acab354bc6c6300245c9e53101d52601c44bed1072375ac94d03d06. 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/DEA892300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646d9b2e93ab1c29d5299bba4f2959d45267cb3e356786b30b760f7be84326f1. 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/DEA892300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149150d29ebaf1679cd4d9e9d38ef53a47d347d6ea937e385bb123372013a2a8. 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/DEA892300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2df40794719e14bccd29eb9510b690f2ff624b7a0fae488d50b3041aab296a. 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/DEA892300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f6ecde6093be0ad320e90065479225708ae9be50a38b9249cf5f5738c87644. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DEA892300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb42986fd077a69c7e5d2bc068dcd4e92a6058fb70ec1388ed496c010e81d931. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEA892300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d055e3cae57dc14fe34ccda5eeda606d8165ebeac7ed2f711edbbe8dcb0f7f3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA892300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c5926688d325288de5bc21b2de300ecdc1bf2cbe629d0286cbc37d5d054a7a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEA892300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a44b6f18ba817e02352ba4bc2cc4f7931376755051e9c6bc34f84fe3bf7aa7. 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/ITZ681000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30554c524947cafc014f05c6798a6d3a380b3b3ea130e6fd47b96174d0870d82. 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/ITZ681000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994f63c71b62c46cf3b94f5d9f81262ddffabe761c38ae1e1d5fa39b5d3e35b6. 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/DEA892300123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ca8fec0168436d9521e22e5995442545d0113ce162b71c016ee8851bd2944d. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/ITZ681000109.