thumb|right|Paul Dukas Paul Abraham Dukas ( 1 October 1865 – 17 May 1935) was a French composer, critic, scholar and teacher. A studious man of retiring personality, he was intensely self-critical an
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 0x15bfdbf93a4b8773b926366373a3c6595674a10008a3d4647a729f15ea9800ee. 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/643fac30-d996-4367-aeab-2ca3df654d04.json and https://artists.proofprofile.net/proofs/artist/643fac30-d996-4367-aeab-2ca3df654d04.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dukas: Symphonie, La Péri, L’apprenti sorcier & Polyeucte
Boléro - From Ravel to Fauré and Chabrier
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 0xa99cb29056babb6051a66a1fce5e2da14108ea40a31c37a9b2b259d439e8caec. 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/FRZ202400159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b56ab4688e8d4f2a75d4ce768f363a428803ff411eb59d8c36bfdca4a5dce4. 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/FRZ202400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313a0a02b4dea542c899a66d937dce3fe9d5c1a77fb34eca05d20dbe88ee606d. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/FRZ202400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xceb4763f8a637e794fb011a0a986f579bc2dbe5be3cd1123c04e913d2355dd19. 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/FRZ202400164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8eed4186394abae4952eadcc9b5ac28591492ba22d351ff6e842ddd350d918. 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/FRZ202400165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b699ba48873dcecedb11d82c69f87de87711a5116c685f4cc39adf66267ad2. 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/FRZ202400166.
Beethoven: Triple Concerto in C Major, Op. 56: II. Largo
Orchestre National de l'Opéra de Monte-Carlo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9acb5974a2a4cffe1269a1190add7b8b6ba8fb5b820be1a358afe87c36a778. 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/FRZ201805063.
Fauré: Masques et bergamasques, Op. 112: I. Ouverture. Allegro molto vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a402a14c845da796eead5e5b30b116a20792b11b5a0111871afd2bf14f36d96. 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/FRZ201900134.
Fauré: Masques et bergamasques, Op. 112: II. Menuet. Tempo di minuetto, allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74349a257523a5d08e540bcc67f3e37a190c40208b725930517370523a635aff. 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/FRZ201900135.
Fauré: Masques et bergamasques, Op. 112: III. Gavotte. Allegro vivo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0736bb9646876c52c0b9911b7cf02ad6e1698d3eea3f9f782aff121ff62b6c8. 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/FRZ201900136.
Fauré: Masques et bergamasques, Op. 112: IV. Pastorale. Andantino tranquillo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f88c866b48b546662d680e51652869374964cee58f938abe9ede1a10edfbe6d. 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/FRZ201900137.
Tchaikovsky: Variations on a Rococo Theme, Op. 33: Variation II. Tempo della thema
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb77f076303f44fda419c45b9e679deb2037b0130393d912b50ec1bbc2c91813. 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/FRZ202100169.
Prokofiev: Suite No. 1 from Romeo and Juliet, Op. 64bis: I. Folk Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a895173778c7dd224bfae5f5e7ecb8a2cc722cb79790bb0276af98c042c2e9a. 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/FRZ209200208.
Mozart: Piano Concerto No. 12 in A Major, K. 414: III. Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7f235115d719d23962db4e8057971ff4797d14d881167c967dfcba238d71b5. 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/FRZ207600403.
Cinema: The Silver Screen Classics Collection
Impressions De France - From "Impressions De France"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd4374a903260ead355cb13fd41f76c9e3613182d95eb35c80adbdd442b064. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USR1B0220022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85febcfe77676f5e7dcb8163a118e2b89ddf42c58f7f2428d8607df1ea276065. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USBC10401992.
Der Zauberlehrling (The Sorcerer's Apprentice)
Klassik die man kennen muss! Die größten Werke der Klassischen Musik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d32a9580d4c24c152401ee8236a75e2550aa7d08f6daa643821570527b91d94. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEE471800480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a50e66c680366e2763b500a0d8dd6d177f2920b81627ab0b3b43461c8149d5b. 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/NLA507701305.
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 0xcc6f5df89f991763cf5d8b15d80730353c9a4de47e359793cd6ecd750d415687. 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/GBAYC8905903.