Vincent Beer-Demander, born in Paris in 1982, is a French mandolinist and composer. He teaches at several music schools and numerous musical events, in France and abroad, in particular the Mandol'in 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 0x52ad7c952f0fdd8c752717e3164664c92f96fe6cd196e3b039bf0ce2bc0e235a. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cd236849-587a-44bd-b235-f791ebcd3b86.json and https://artists.proofprofile.net/proofs/artist/cd236849-587a-44bd-b235-f791ebcd3b86.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 0x8149ffd302cf32f16d308b633fac3e81b78b8a17f0d7f96f6b03c848a8003391. 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/FR9W12035398.
Vladimir Cosma dirige ses oeuvres concertantes (Créations mondiales en public)
Suite populaire (Suite populaire et œuvres pour mandoline et accordéon)
24 Caprices pour mandoline solo: No. 4 in A Minor, Moderato espressivo. Retrouvailles secrètes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915b4858346d328cb848b68db0921ce02e16f40e9084d98ea55b5cc42c935766. 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/NLF361900310.
Orchestre National Symphonique de Roumanie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e38eb14a5b945d96c8efc494674b223d81472fcf97b550a61f9e08b56440a3. 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/NLF361701150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f0348e8616046251c07d76681e90b4fb60ee52aa1d5cf424a24996143afc54. 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/NLF361701270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092fc6e07e37282918a37d7b196d7bf4bde0cb15894c23ae93a8492813e8c3e3. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/NLF361701190.
Chœurs d'enfants sous la coordination de la Maison de la musique Vladimir Cosma de La Motte-Servolex
Chœur Elégie de l'Ecole Nationale de Musique de Villeurbane
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc87a378f7605d5b6bb9cc68787cb26c7855e4651a1c0d7829ea1784d3166357b. 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/NLF361701200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe27df083b70415e904d2a99c8abd01c9cfe183a0c9a869968cfac8dca5cb231. 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/NLF361701220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f776782a1dbfe27f8b707da46d98cfa4ebb9de4a2e08398728dde96196cae46. 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/NLF361701340.
Le Château de ma mère: La Valse d'Augustine - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc30f8bec868d5471213f1b04de642e52a3bd4ba55e8e8afa7cf2e287641fccfd. 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/NLF361701230.
Le Grand Blond avec une chaussure noire - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70d082714e39d458059592faf738c248a81649c79048aaf65fedd7d9c776be63. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T16:16:04Z), 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/NLF361701350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b6093c9d40858f0d84cc0f5ca0940a7047f70201c21000bb01232cb5cb35f4. 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/NLF361701250.
Lalo Schifrin for Mandolin (Sonata del Sur, Fantaisie & Works of Nicolas Mazmanian)
Variations on a Theme of Lalo Schifrin: Nostalgia
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e3a6eb7d9f88d1c62439c1a987edcf9cb3e3799f895b8c516c1d407f713e4f. 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/FR9W12035428.
Massalia concerto : Belsunce (Version plectre)
L'âme de fond, Concerto pour violoncelle, 1er mouvement
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba02357e432d53a38ceeb5f068e59932bf3e3ee3b9acd7ba5163dce3e3c729b8. 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/FR50X2399502.
Partita in E Minor, BWV 830: I. Toccata (Transcr. for Accordion by Théo Ould)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06fba5a74e0ad6f0ce10a13ab6a2bd4157d73dae3ed290cf8ecc78bd7235d440. 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/FR50X2399503.
La Petite Naples, Vol. 2 (Opération sultan)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3eac0442ef1305c4ff5dd9990c6058b4703461fb7a416b54c8912503c0b43c1. 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/FR9W12300012.
Inspiración Acordeón. Música Para Jóvenes Acordeonistas: Música De Cámara (Vol. 2)
The Lyrinx Recordings (2017): Vivaldi, Concerti con mandolini & molti strumenti
Comme les enfants savent aimer (How children know to love)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cc20b529f2a93ec2189adb015f073fed7ee73f54bae07730b906b0cf97a616. 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/FR9W12440899.
The Lyrinx Recordings (2016): Cinéma Mandolino
12 Danzas españolas: No. 5, Andaluza - Arr. for Violin and Piano by Fritz Kreisler
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5aceb2813f9333fbaa01c0a7f7c645c20e968c097ac34affc5b33c40733519. 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/FR3KD2500042.
Jean Claude Vannier et son orchestre de mandolines
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe805b944f2c5d1d4824376a886f708990c17026d8982b17aff38dd0411a57b8b. 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/FR9W12440898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8cc20b529f2a93ec2189adb015f073fed7ee73f54bae07730b906b0cf97a616. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR9W12440899.
À cause de mes problèmes (Because of my troubles)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2725745003caa0b7a14f0cbe0ca219f42d4d11630de1fe6d89f54d241bfb2df. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR9W12440903.
Une séance photo sous les arcades (A photoshoot under the arcades)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0fc26bf7e06f1a8e0a3a9232b601069c3bbd53b06b714e34ec1025dd596bc3. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/FR9W12440904.
Belle à pleurer (Beautiful enough to cry over)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bf01e7dff42d19679eeb605001db152c81a490cc58be4f238eabcc47dd767c. 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/FR9W12440905.
Danse des maillots de bain (Swimsuit dance)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1346ce2d361d91f8a94417607737124655273fe758a10a3370d086f83016b6bb. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/FR9W12440906.
Un petit bout de verre cassé (A small piece of broken glass)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d6b15dbd67c5e70a3966ce4ebc9f7c4bc641cf5f7de033c915afb91d7b71ce. 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/FR9W12440909.
Il y avait des éléphants (There were elephants)