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 0x843751191be0f4c26a9ace529fdd83f0b1dfc3e336a17dd3c7f00f1bed23fac6. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/658e9e60-d6bd-40f3-9c02-c3d3b764e49a.json and https://artists.proofprofile.net/proofs/artist/658e9e60-d6bd-40f3-9c02-c3d3b764e49a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
One Voice - Conspirare Christmas 2012 (Recorded Live at The Carillon)
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 0x54409ccd8f55af2db30bab3583147c166c63b8bf053f2d6a612ef17a67cac4f0. 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/QMEU31713967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd15f1a4722fca3e2e77d1f1c10610d30b225609e13a0b6f294bba7c7fefeeabb. Chain 2 (Bitcoin): anchored in block 957065 (2026-07-07T16:43:21Z), 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/QMEU31713968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e6cafaf49895ddf85209701ebceedf9301a87ef56e21b8d285c50bbb6a83df. 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/QMEU31713979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb28dfd74f051865f5556310f7d1faf63a19fef6186cd5d8492cda49154aa6dd8. 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/QMEU31713980.
Carmen, WD 31, Act 2: "Votre toast, je peux vous le rendre...Toréador, en garde"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ad6cfc227a3a8d227840c7923949e38c5e63117b64b2693bbfeb4cdf2ec979. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/AUAB00450323.
The City of Prague Philharmonic Orchestra
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacf36ac20ceb1318ac474928c0e5a38c28042f84ac06511d1eceba561c09bc8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZJ9L2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e96e9e5c8aaa095aaf511f748de94f939cd6fd31b6d552f296f68ebfedd2886. 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/QZJ9L2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ec830a84ce1e21dae7e169916af0f28ba3a900fdc9e1049f0cf1b0aa4fa7ca. 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/QZJ9L2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392e370a9007c01750258e18c67c616c95747fe0f7267539646f55d24731f803. 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/QZJ9L2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6df6c7ce28ce27cced394d613b972febb135c5dbc557f7916ac817fc6660860. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZJ9L2000005.
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 0x910cb615c927e4724f7e2d1102f8414f25446677730147c3f3609ea3d46e7e6e. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZJ9L2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf618ae1354952bf97798a13c6eada4d95b3e4a264c4abc06946c9ebcc7a32d60. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QZJ9L2000010.
A Collection of Broadway & American Classics
The Music of the Night (From "The Phantom of the Opera")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc6c7aa9a74eb787a1884b31b52a73738b7b8397d0ce6ee4c688ffd228dc7d0f. 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/QMLY81800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d4b335a7a0d11cd25260f1e6da8961c41b3e8a0d7e28a14b45e81abf349b318. 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/QMLY81800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f4bef6894fed711cf2de226d520fa7837aa2b3c60dd8f696e992a6c8c078b84. 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/QMLY81800009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789fb6c3ff935bb08fd758ef5f3f5be265249804eb115b9a7bf98795be2dcfd3. 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/QMLY81800011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39ffa739ccfdb6f21de2919a367635cf5e3ac9e00d046bc63e1388a7cf72f0c. 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/QMLY81800014.
I Dreamed a Dream (From "Les Misérables")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4962b6312fcc2303098c095c164d683d8469199807996978d04c49a88d41acc4. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMLY81800006.
I Dreamed a Dream: Hit Songs from Broadway
I Dreamed a Dream (from "Les Misérables")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb2246b5da7463f0a54c8c4c3ff0e1b71bf97d716275777104346ae7621e6e0. 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/AUAB01350191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cd75898b0cd67d23182479d09088adb74096382d7efe2622fe2e7f3c6e9899e. 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/AUAB01350207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae38d079b989b0e6d2e1ff1363982e8cc5221ed13433c08d42ae21005fa8dd41. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/AUAB01350192.
Violin Exam Pieces 2020-2023, ABRSM Grade 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f27bcc9aac70abe8830081d666f660581a117e54997b9b688b3d7501eb50930. 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/QMBZ92080076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79421a4e6dd495fce3cb70a20aa07bd7710141cac04886cba59ef9c5ff070c36. 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/QMBZ92080081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fb7ed51ad22c506bb650f82ea5c9ce56c73bd22e41ad76e416c5a5aedfcbfa. 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/QMBZ92080083.
Do you hear the people sing (Les Miserables)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5d678d98bf695887d7722ca30823abc89ddce22f5781648e4f1b82428a076a1. 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/GBCFU1500123.
My Favorite Musicals Vol. 2: Peaceful Piano
Natel, Schönberg, Boublil : I Dreamed A Dream
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54b422be9f28326ba0001a8de1626d76b66bbf8163ba9044f0c72005d3689967. 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/SEPQA1200208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61db8434a9d5bf90d2ec4e4964d912ed6fe796dae8f40a4628112f85520cba0. 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/SEPQA1200209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994d17ca530fb1a604bd798c4541acf04baa8e9efa8fd0b24609ca1ce70001f3. 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/SEPQA1200215.
Rice, Lloyd-Webber : Everything's Alright
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d401d8e0c055bd553b77e472166bcda6724dc45a7a8ff845df7c1701b9a13d. 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/SEPQA1200211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21834837b66779147d071959297722bd5568c47e91beab693f73d46e9eda7e3b. 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/SEPQA1200212.
Landesman, Wolf : The Ballad Of The Young Sad Men
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc24ff13cad56e161d63238a2adc2c47722c5c6092cb1e5aa87c16a11205cb6d. 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/SEPQA1200213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd6f533658eaedc5153412405301978fcb13899d59f29f7f3e7dcd92e367d414. 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/SEPQA1200214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fb849c66034058fd6f2cb390a87b79b170625369283e16dac1575979924918. 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/SEPQA1200210.
Andersson, Rice, Ulvaeus : Mountain Duet
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6601aba48a6a375cff17ae586b0aa6ef3053372f0019a0a0709242e29e3522d7. 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/SEPQA1200216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7a0fb78a69e275d96c79cad0c3e8919e48cd84f2259365de362629582ff748. 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/SEPQA1200217.
Stilgoe, Hart, Lloyd-Webber : The Music Of The Night
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444be7b3be5b23ceadb527d7bc23b4c9888dca324973383c49143a5bed47ce7f. 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/SEPQA1200218.