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 0x506e47e12c2eab3430a7414be0bd312953c642d80f5b9f491759036296d892d6. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5db0c021-7ad5-4454-8394-ccb1350bd49d.json and https://artists.proofprofile.net/proofs/artist/5db0c021-7ad5-4454-8394-ccb1350bd49d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Berlioz: Les nuits d'été - Palej: The Poet and the War & Rorate Coeli
Toronto Welsh Male Voice Choir with Shannon Mercer Live at Glen Gould Studio
Codiad Yr Hedydd (The Rising of the Lark)
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 0x0ad99be77ebc425d5037209fd3caf3469ce4a81b7ae019c47f4cb266812e2a0e. 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/CALC40900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c427e8e23bc2f72bda8317c1dbc3477c64b9de1c48882e411ff6c5017be85fa. 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/CALC40900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93e1f8b8c13e8375d9ee0fcf29c2954ef5fd0a7f4171815e53a670911b8f81c. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/CALC40900014.
Bach and the Liturgical Year: Arias for Soprano and Organ Chorales
Mondonville: Pièces de clavecin avec voix ou violon, Op. 5
Pièces de clavecin avec voix ou violon, Op. 5: I. Regna terrae, Cantate Deo (Ps. 67, v. 35 et 26)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f72f2b4da67b715f40aeae2856b78c07f078b2b0d75ff2894f0703f80c35f13. 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/CALC40600096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e4debc3c9e4d0e7ddade96d7b323d00f7684e0cc801d2fbe4ba406791b8c9a. 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/USA370522466.
Saint John Passion, BWV 245, Pt. I: "Jesus ging mit seinen Jüngern" (Evangelist, Jesus, Chorus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aba5b93f1a4d41341d5d1b7c6812bd0b9cf1085a1f20b7842bac592ae759bb. 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/GBELX1104168.
Saint John Passion, BWV 245, Pt. I: "O große Lieb" (Chorale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0939c4e72b26059a65a7460359514eced781dcb3390c91e0b90a095c65356bd. 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/GBELX1104169.
Saint John Passion, BWV 245, Pt. I: "Auf daß das Wort erfüllet würde...." (Evangelist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70742c7a04ee3a7c49104caf0f315ec80eb3361178ab0b0f600db6472c29fb89. 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/GBELX1104170.
Saint John Passion, BWV 245, Pt. I: "Die Schar aber und der Oberhauptman..." (Evangelist)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67a279b03f5a46692802000d610d765214d200af4ad98b720099f4f4b7375939. 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/GBELX1104172.
Saint John Passion, BWV 245, Pt. I: "Wer hat dich so geschlagen" (Chorale)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ff3b523bf6122a447f32da5786701aafed80ae54c17888d7b269f937addec1d. 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/GBELX1104177.
Les 25 ans !!!: Le Concert Spirituel, Hervé Niquet
Second livre de pièces pour clavecin, Ordre Sixième: No. 5 Les barricades mystérieuses
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df450cedb0579f6be6c0e64911a37f1adb7ff07783398524c1c9481692d91ca. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USA370568321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22ac25c6c08ad14b55d04504712a5aa64a4a6094fd8b2c41bc995c330216a3. 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/CALC41601221.
Sonata No. 5 in F Minor, BWV 1018: III. Adagio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dbf9e58361a83d025f04ca075c96d1ecea579acd082b17d31a1cb222e8c3b85. 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/USA560611278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43bcf8a4e28c5759b65b3db8a63cc189666657aa855faeffb67111beb0be06a. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USA370539282.
Mi palpita il cor, HWV 132c: IV. Se un di m'adora la mia crudele
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4535fdef91fd1e1f6a2c7426fa2acb1921c3a42e764877959965403198c3f150. 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/USA370524133.
Dydd Gŵyl Dewi - Welsh Traditional Music for St. David's Day
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c427e8e23bc2f72bda8317c1dbc3477c64b9de1c48882e411ff6c5017be85fa. 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/CALC40900003.
Mout avetz fach (You've Let a Long Time Slip Away)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0403f077c8b6dc4075c8d8abf9f6c13f5c01d2ac1190bd352a4a7216fa1f4c. 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/CALC41302042.
Ar em al freg temps vengut (Now We Have Come to the Winter)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f215bef8dd9e4873e3cd1b0a7870187955da30c88934bb46869bc6ab0bf2ab. 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/CALC41302045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedfaf1005ec2c36f54993f4bd1c3b35394b7432d44369978a4e50cd984dd964e. 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/CALC41302046.
Las Cuatro Estaciones Porteñas / Otoño Porteño
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9893fa9058583cf5fed60f27bbb76394c306167636ba8486ebddc3c174672fe. 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/CALC40800308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x372284e36a67834b5ebfcf055b4bc1b22d5c8d52e09d7f1e2a0e02e460d3fc97. 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/USA370577010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b47494c90e82f5c1806995e67cf47c9b87b8264a5868a5d3e184a8dfd02b9f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA370531163.
Rhapsodie Sur Un Thème De Paganini: Variation 18
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x228b45aff67f64fadd5697523f60a00cc3b9f74d6ddb379c43e399daaa1cbe27. 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/USA560690728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fe8a90fa528a4fa22e95f8af73abcaa0f3db8ab17665f423f96a044491b04a1. 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/USA370523048.