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 0x1265f543c6a7dd04b7c969536cdca99c4941b937740f94d35c6578cc8c45a4a9. Chain 2 (Bitcoin): anchored in block 953645 (2026-06-14T14:31:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3de5e4e1-c7e1-4fc1-b53a-8a19c86c1365.json and https://artists.proofprofile.net/proofs/artist/3de5e4e1-c7e1-4fc1-b53a-8a19c86c1365.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 0x5409aec76b400a25934971990f0cc87d6f1dae1ef119f16c732338b35a6e6292. Chain 2 (Bitcoin): anchored in block 958554 (2026-07-18T13:17:01Z), 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/DEE862400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a8b02bd7e732412db31498fbd36baf6e33a982c0e506091fd00848971efbd6. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/DEE862400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf793957a2047ef35c174373bf5f1b68b03e56134c4b1951110a927d735e764. 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/DEE862400728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb53c8280e1fc04891422350af77d24ad5e72c028d114f0fe26176b8d30bc16. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/DEE862400722.
Strauss Lullaby Variation (From Fünf Lieder, Op. 41, Arr. for Piano by Tim Allhoff)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe641b5c0dbb083b54eaafdd3fa515e49e691c9fc858c213c02b46cdbe2e5b9bf. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEE862400429.
Mozart Lullaby Variation (From Wiegenlied, K. 350, Arr. for Piano by Jan-Peter Klöpfel)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc8b101dce234cc3dd2c5c4a46b4d5f0d2f7cc0f9fac35a5a9602c5d6a1749a. 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/DEE862400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x275a53a6d98ac6fada228a754d3e65cc4fe29dee78f950b1315243473d45951b. 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/DEE862100990.
Genshin Impact: Lover's Oath (Arr. for Piano by Pascal Hahn)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd259c0e35b882386f2fdc6c64c58dff0eff428f79a1fca53ba764b122c850457. 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/DEE862301190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61a10b3fe932ba27224585e555307b6a94fdea3fda6c3b95befbe550f28234d. 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/DEE861500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bd327fff16938d61d9a51322fe62ad5f08b0160a08ec71fc67e472a125d5c7. 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/DEE862400610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5409aec76b400a25934971990f0cc87d6f1dae1ef119f16c732338b35a6e6292. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEE862400567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf092a7fe7b5c0cdcffe0d7c7a5349272fb722adb5d2aafea64a4224f7e01a9d. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEE862400569.
Handel Sarabande Variation (Arr. for Piano from Sarabande, HWV 437)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0822431c5f6d920a0afd63ba7cd5ec3c168b162372a2175fcda041940fca2b0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/DEE861903553.
Schlaf, Kindlein, schlaf! - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62e639c8307aacd4a3ca9c253ce15e29c1f7b6884a873caa723c7bc7da6adf1. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEE862400612.
Chopin Memories of a Sonata (From Cello Sonata, Op. 65, Arr. for Piano by Ketan & Vivan Bhatti)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745c25deec47306dfd854ec67faacaa4014251531f6c807cba2e0e60fb84bec8. 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/DEE862400064.
Weißt du, wie viel Sternlein stehen - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f011b996f4d20805a6cab1f2243ff3ec2b9db89ab42dc022e868b5cd59be4c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEE862400622.
The Swan Piano Variation (From The Carnival of the Animals, R.125, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750ee5d9bf2d9ea3e95cc2004458291bad72a44553cdc9575e14dae1d903edbc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEE862201065.
Der Mond ist aufgegangen - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb2cf3a13cbbac89e1ab6b629ae729059e7e98cf08af527d4b0e6bb3b3772954. 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/DEE862400616.
Aria Variation (From Goldberg Variations, BWV 988, Arr. for Piano by Svetoslav Karparov)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839f778fad5c2bcb2ae648b070b54d0647060f690a42a75cdf33cf8ac9da0b74. 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/DEE862300120.
Sandmann, lieber Sandmann - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c27aab55a24051a9e9cc3c1b08fdbb1e67bd2fe57cce6715c824fd830305d0. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/DEE862400618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x655acd3ffa08ebeaa8db3f2d8dded966f41714a6b0e9384afb665d3d2091af20. 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/DEE862400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x134c3d33db8610d7b5f081dc7ec206b1ee22890f811063d4c7c2be7a6ebada76. 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/DEE861600233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a8b02bd7e732412db31498fbd36baf6e33a982c0e506091fd00848971efbd6. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DEE862400571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd88d620e12623279c76df8fe9b847d65f773d0cb8a53e15c1f79ee72d326cb6d. 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/DEE862400718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa12cbf06202311cd88d9f3cb5020d60535ec0a153fb8a93e9eb4c3edc97117d3. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/DEE862400708.
Twinkle Twinkle Little Star - Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9faba1622b7f5c752a49ee203174cd29386d0cb376f40490cd26f684432c1954. 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/DEE862400691.
Liszt Variation (After Im Rhein, im schönen Strome, S. 272, Arr. for Piano by Florian Christl)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c1c80d52ac8f0ef063603b6fd18b05345231ad98b063f4c9cbc479bf174c64. 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/DEE862400826.