Goran Filipec (born 1981 in Rijeka) is a Croatian concert pianist. Biography During his early career Filipec won top prizes at international piano competitions (José Iturbi International Music Comp
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 0x9e1c28563d03a7d4b35a236877eb280dede9b75c75bdbfd8ed5c70c9406decd0. 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/b28e9af1-776a-45e8-b3b5-e4812beb171e.json and https://artists.proofprofile.net/proofs/artist/b28e9af1-776a-45e8-b3b5-e4812beb171e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Standchen, S. 559a - First Version (c. 1837)
Liszt: Schubert Song Transcriptions, Vol. 3
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 0xda2d6484594d97fab2ecf96de206f0db0dbb88e80b6fde78371887d1c22eddf4. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/HKI192229901.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 10, Rastlose Liebe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3650c61066b62988984b816b451a68968882941c1abd5e903c3f5273b8e4f94. 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/HKI192229903.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 8, Gretchen am Spinnrade
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ba0914f767d2e028e0fb3a4e377293d176114fa422d090f0110416462d43c74. 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/HKI192229907.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 9, Ständchen von Shakespeare
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa807e93e9f406932939266902cb0acd6d625faf11c22d5e78a2ec7e1dac4fd5e. 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/HKI192229908.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 6, Die junge Nonne
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bcad7beacadc1859a26388e21b7765fc541938e7e4d2335a13007d627668cc. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/HKI192229902.
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
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 3, Du bist die Ruh
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42306e8bc930ba37c38942016179e4cf9aa7d806b7731fe2480b208f915b18f2. 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/HKI192229904.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 4, Erlkönig - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08c765f241e292f8e2ed71db5030866cfa470cc49164addbce32189ebbcfaf2. 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/HKI192229905.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 7, Frühlingsglaube
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271b19ac8bfb735af5d071569cbb4c3c032dc71dcf42ca7b471862a9d279f314. 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/HKI192229906.
12 Lieder von Franz Schubert, S. 558 (Excerpts): No. 11, Der Wanderer
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64d8c83869452ea9e225cf6eb4831579284e112ea2260115c21fd7cfcbe386f. 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/HKI192229909.
6 Melodien von Franz Schubert, S. 563 (Excerpts): No. 1, Lebe wohl!
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3531e663d5ced33deec6faa8910154275e26b4a6bbb40b339f6ebfb4cfea35d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI192229910.
6 Melodien von Franz Schubert, S. 563 (Excerpts): No. 3, Das Sterbeglöcklein
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6107c49dfff6959e5e0973b687abebbd151d7a7243db7ba8d33219a8bd81c9. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKI192229912.
6 Melodien von Franz Schubert, S. 563 (Excerpts): No. 6, Die Forelle [2] - Alternate Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2bc231f7b28552f12b18d51a9e5fb69d8a6aae0233c871349762395c59ea577. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/HKI192229914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94e10fe2deb322a68718996eedcb8b615aeae4f95848776a5edc7c3500959fac. 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/HKI191520403.