Jaroslav Filip (22 June 1949, Hontianske Moravce – 11 July 2000, Bratislava), known as Jaro Filip, was a Slovak musician, composer, humorist, dramaturge, actor, columnist, and early promoter of the in
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 0xb45bef047b2a23c761f98bbbd5f86ac4b14541cfe9ad9cc17881fc4b2912332f. 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/45683bc4-0ef1-4c24-860c-c9b974a488ed.json and https://artists.proofprofile.net/proofs/artist/45683bc4-0ef1-4c24-860c-c9b974a488ed.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15de275e8be8b45c45c9f43c28ae3ecc7b764a6d13b26922d052356882a3129. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/SKP659600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67b3ec88a43ce523eff69ef9f67b4f65bd0cfd6d61ceeb72ca45dadd88c2e892. Chain 2 (Bitcoin): anchored in block 957566 (2026-07-11T12:26:02Z), 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/SKP659600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3063072d6f02c3836075bd4a29c019c758e1f968adf437d9bc949604070d873d. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-16T00:06:05Z), 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/SKP659600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffc7918ba887466666683320535c517c2a6928c145b93f5dcc1da8b28fc72c2. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:22:50Z), 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/SKP659600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08db19fe46f4e2e383633441993d78496a0a1f69eaf618b48ff8384d5538820. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/SKP659600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd929dc954d0c0303b165f2bee9408f8d5db89bd661f8ecb08a9d814040e982. 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/SKA129864701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb9fe2630a988f5eedfd1d5f532ef4388bc91e23f4aff03f7fed7cbac71d6711. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/SKA129864702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc362d6372bca3e05fa4b9191bf88eccc0a1d440e7b75c4caf7112d8ef928b4f8. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:35:44Z), 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/SKA129864703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dc513ba75b5262943a91625ff11f83a0e8d4b794539be54c5b4c2a363859f2f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/SKA129864704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca3795bf96819306ec93b793c50430ef5cfb541e354a848ec0dd60f6288e7efd. 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/SKA129864706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a295334fceaf5815b1b473c5fa274d7a31a9aa32c0f3faebb427bb3ce9f3d5d. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:43Z), 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/SKA129864709.