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 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 0x4b849e16ba0300190e1e2723d069eb4902a40620ef23e91d26cd1f89485341f6. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ce56c2a-4208-463a-b17f-f1c867d642dc.json and https://artists.proofprofile.net/proofs/artist/9ce56c2a-4208-463a-b17f-f1c867d642dc.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 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 0xe1821c007fd8b9dff5bab5d230ac23becf0f854b8ff6be894b777753bfff11a0. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITDF61754011.
Sadness and Sorrow (Naruto Piano Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bec683ed58b6e19f923c93ade470a8f72913315d445be33695a764e61883062. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITDF62054015.
Grand Theoretical and Practical Piano School, Part First: No. 4 in C Major, Five Fingers Exercises
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb11d290a6f5bffaed85394af87aafdb36cd3472fe02d9b62b2b09ba6c58f394d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/ITDF62054016.
Grand Theoretical and Practical Piano School, Part First: No. 31 in C Major, Five Fingers Exercises
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9bcaf19b017d2a8c29200518e443582809f9764ca8857752285d31100946b0. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/ITDF62054017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d7d389e53ff5e4285f22a92056723fdb44b3b5acf1ea680000f09eaf5615bf. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITDF62054018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18594400da99c3dd1b840782b895395adae8fad7c39974d7bbe939b0487732a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITDF62054019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8933c7dbed8d2d65bc35dd69bd8661b6b507697872ce482793283f7d7d2b0787. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/ITDF62054020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134bcfd4c0659de018a85efbad548d2ddcf87df9a4f4595ee9c0fa4fb52e366b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITDF62054021.
Mary Had a Little Lamb - Easy Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a6466736e324c53882bd47b6725f8357d620755b9871b7a46281f5731f1896. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITDF62054022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe870c34646f27c2cb7c31590f6c460430e065061a0045085e1d4047fa8c229a6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITDF62054023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fde261873b9f75ef5ccbaf17990d87fd07437a19d0702f5358693b6abf58c86. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/ITDF62054024.
Preparatory Piano School, Op. 101: No. 18 in C Major, Allegretto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141c3b8b04b7acec80dd3d430724d3235d358f74b39ab8c6bce91ef161953d7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITDF62054025.
C'era Un Ragazzo Che Come Me / Acqua Azzurra Acqua Chiara / La Mia Banda Suona Il Rock
Can You Feel the Love Tonight - Easy Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e538b24e0d3b63511071ff2808f72b03773de857ee0d122f3dd3c71b520feba. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITDF62054029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd747b09814730bf18c8775c6c9d9dd3dd3032159e860652bf7908dc81a4a4d7b. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITDF62054030.
Symphony No. 9 in D Minor, Op. 125 "Ode to Joy": IV. Allegro assai - Easy Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18b9162c4d35f6ef27715291b13e295391600c45ef88771486497b222513e7fd. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/ITDF62054031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ea56ef926e228d18ca155695e3cc4b7bfb41cf5632033a7c5d060d540a16a5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITDF62054032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a8692211ecc629b92da3ce5b0c33945ed5a54fc0793aebec170b26ce643480d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITDF62054033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x989fb5ab3a61805df7f48c151a41c530e2792018211be2f2628c495d7dd6dcb2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITDF62054034.
Bastien Piano Basics, Primer Level: Indian Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3557ca83cce06d412abea39ff9f0b8f6994a65fad0b4fa498536c86a85144fb. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ITDF62054035.
Bastien Piano Basics, Primer Level: The Singing Donkey
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c42c268c6223c5cb4f9a996185e3db2e25c3f26ecf3815b3f62cadadddf109. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITDF62054036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48f0772d8d9f5c0dc1c76e14af7899f42e61845d7d4843d882756e0bd2a25ec. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ITDF62054037.
Bastien Piano Basics, Level 1: Sing, Bird, Sing
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72edfb4c9a110cb347223050a25cbeb228df25814b9b85a6ea1fbe3806177f73. Chain 2 (Bitcoin): anchored in block 958733 (2026-07-19T12:51:21Z), 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/ITDF62054038.
When the Saints Go Marching In - Easy Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad2f011f5bf9c0874233be599357c3bea452c0c172d5b59eda34d05a3bc892. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/ITDF62054039.
Bastien Piano Basics, Performance Level 1: Tap Dance
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfda7605e511330701e753b071d70de7ef47b641539bed2bcb861bcbf3bb94fff. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ITDF62054040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbc880a3c15536ee6a2d16f75ca361ad7951530ba0490393ec3637083d4cba0. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/ITDF62054048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b63f44b8b07393b411a83e776a11d7d66a2e2aadb6d309fd7c684c06a9202c9. 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/ITDF62154002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb588040e2e66daf4e0a90e13bfeabbe9c3113bbe5557f70d177083a341b5b6ef. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ITDF62154003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8df65031a5a2841a1513772908b9734e378549f1ffa07bf4b06f8e4fdac3fa47. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/ITDF62154004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a88806f269384a1ef81d2357aa5f3849d96d6dd10808a527f87b4e5b7704e29. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITDF62454001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7c0f21d8af17faed920333eb04027eae90155e2b2aac1f0ce97755ba518eb46. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITDF62554007.