thumb|right | alt=Sheet music of the main part of Franz Liszt's Hungarian Rhapsody #2. | Main part of Franz Liszt's Hungarian Rhapsody #2. Friska, also known as Friss, (from , fresh, pronounced frish
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 0x6b0c732508b6b122ad81b979c9f6fc9105392651736ede113d52da3dfe324a9d. 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/4c5f8154-91fd-4da4-a4bb-e462b64cdc2d.json and https://artists.proofprofile.net/proofs/artist/4c5f8154-91fd-4da4-a4bb-e462b64cdc2d.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 0x0096485239d3241d6e5e55e7e50bd5a2efa6ccb264b828550535c84662cd5099. 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/TCAIZ2441815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d02fff32aed9797bd00c663add4acda729a76c8f3de0912bcdc9e113f14e01. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAIZ2441849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f1f27f91799a8fb735b773782e396c4613eda44b276b31e8f36103734e06707. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/TCAIZ2441869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b8b40cdb355a3cc6a22a7aeba6d311c08359746255b81392e2e9b09ca8522f1. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/TCAJA2441882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc9aede3321a83a495e1e13f7978e5ebf6652e7cb5f8467612a2548e1192457. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/TCAIZ2441886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8134ee618422cb262becf063a38e698538a82341d6df20843a85ee2c5ffbfb. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/IDA832111462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd01a2c7844f4ca553822bcf1d48acf6abbcc8e9d763b2f7b0f593cfe1174390c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/IDA632523874.
Pop Sunda Terbaik Friska Gasentra, Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d10b82da4a06af7e6e826deec36f98999a13d27fec2bef6a30fdb890e78ed9. 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/QT65Y2577333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1044cbde44517e0db073423fc63b35f924cd90baceb172c93d8976d3b9e223f. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/QT65Y2577349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3262c01ef671daaad80d9de19e21a9da678eec6937f6488cf47fe1e9432eb9ab. 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/QT65Y2577355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4489a6c449f2c116916720a0f79dee230b7f34b4c0673f3474c2cbfec069c70c. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/QT65Y2577359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d4541c986fe4d9947096d4a45f8650451b37a9c1a4e5f546142fdd6bc8939a. 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/QT65Y2577360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6e8c9d7b7e960596e9a2c2b152a836624a2522787119723ca034fc425d92fb. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QT65Y2577366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45b175149a65fd762534a87ddd72c4fcaeff10d2febe302225dfa86ce0387a0a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QT65Y2577373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e00e9119c4267950f8525b3c633bdeeebc14b34ee03131a6419675fe2b6bb5. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T11:08:30Z), 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/QT65Y2577377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044d6717a9ba1c80cc43ac046758ff0afb5e98ee9229f904f17506c7b0c0aabd. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/QT65Y2577378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b8a099e3f74ef80817c2a2fe0aa72ab0d57d83794ff6a8506301e1f1eba38ef. 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/QT65Y2577383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe062b1ad3817dd1ce48688844695b01d36f7c5968346b0701536088378392e5a. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/QT65Y2577385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810cb3f1f96fcffe59ecd605314ce45e6a44d5b73b2f857190e1ec74c35fefc2. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QT65Y2577391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ce6c74521c5755ae3082e8e9d1df912bec48c79a2458400cfc856f020a5fa2. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QT65Y2577401.
Pop Sunda Terbaik Friska Gasentra, Vol. 2