Kassia, Cassia, Kassiane, or Kassiani (, ; – c.865) was a Byzantine-Greek composer, hymnographer and poet. She holds a unique place in Byzantine music as the only known woman whose music appears in t
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 0x8cbaccffa367dbb50c1037dcb5af8247e8968db8fdfbeb3aa76a0a2f2e5dd006. 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/b75c250c-77f6-4152-8140-0f5e8eaf0fc9.json and https://artists.proofprofile.net/proofs/artist/b75c250c-77f6-4152-8140-0f5e8eaf0fc9.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 0x366eb70545b836ffc231f053411f8651ffc9cf517a4760a6d38ae1858cf21dd5. 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/QZFYW2008616.
The Most Beautiful Classical Piano Music Vol. 1
Once Upon a December (from Anastasia) [Arr. E. Pandolfi for Piano]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7229f37b7cd792249d361a95dcf2f152f06c5d421a9735482cb5b3da6cbada. 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/QZDA52057457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ce9219fa39a0a81e353348a5df115c9b67d686459e98baefae66b21c889ce2. 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/QZNWV2044113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26936696fbeaa3d1187612b7690f1ada1f0a1692d52899d8b2f5987e93c4722e. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZNWW2088851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1e2826ebf29cb22a978047c9d049572dd74a16117d33e60b368c2105b90f87. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/QZNWY2018780.
Moon River (Arr. Mercuzio for Piano) [from Breakfast at Tiffany's]
Passacaglia (Sad & Emotional Piano Version)
Waltz of the Flowers from The Nutcracker (Piano Solo Version)
Moonlight Sonata 1st Movement (Piano Sonata No. 14 in C-Sharp Minor, Op. 27, No. 2: I. Adagio sostenuto)
Dance of the Sugar Plum Fairy from The Nutcracker (Piano Solo Version)
Minuet in G Major (Attrib. J.S. Bach as BWV Anh. 114)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e81f79388169198943f4ccaf4fffe1692bd855ae139f853f221309ee9da6b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZRP42298555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe200c5efe6fc9fe5902a2fe3b44748feeb726cca18e0d6c736a8916fd1599789. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZTAZ2227693.
Piano Sonata No. 16 in C Major, K. 545: I. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4155698c811e0790e96b19f06ab495bd1d54cf46f0ca357766208633be9e1be7. 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/QZTB42241881.
Symphony No. 9 in E Minor, Op. 95 “From the New World”: IV. Allegro con fuoco
Symphony No. 9 in E Minor, Op. 95 “From the New World”: IV. Allegro con fuoco - Piano Solo Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dd8074aa65bc906bb375f336c2ab5470c4e59fbaed2d831399557b568447ec. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB72220749.
G Minor Bach (from "Piano Tiles 2") [Sad & Emotional Piano Version]
G Minor Bach (from "Piano Tiles 2") - Sad & Emotional Piano Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x653bf23feb1918f64e20b99d17c1f335eba9cf6e13a99ba13aab4edf21c4d1c1. 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/QZTAS2489970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3d8b0c5c3b6b8ba0744cc57676b1e996f792ce7d17666ace51efb693d91878. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTAX2405292.
Now We Are Free (from "Gladiator") [Piano Solo Version]
Now We Are Free (from "Gladiator") - Piano Solo Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4b74d89c0b2e5a8bb31bfc2ac1d5c11fc2de28b657dbef132c000c659429c7. 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/QZWFR2469249.
Passacaglia, Suite No. 7 in G Minor, HWV 432/6 - Modern Piano Solo Version
Passacaglia, Suite No. 7 in G Minor, HWV 432/6 (Modern Piano Solo Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e674ffd1936d999ac6553438ca402df4421fa290118659675faf6c50b87b554. 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/QZFYX2092565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092213e5b048652bb56f21dc132adae75174d3eb70635df9b0cb08f23681b782. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZFYZ2032752.