thumb|right|250px|Fecó in 1981 Fecó Balázs (born Ferenc Balázs; Budapest, 2 March 1951 – 26 November 2020) was a Hungarian singer, songwriter, and keyboardist and the founder of popular Hungarian rock
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 0xa156f1ea7e4e852dfc02df0d623acd7dd4d51872ee3ce9859abd9350cd35bf13. Chain 2 (Bitcoin): anchored in block 953612 (2026-06-14T08:22:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/14a6639d-b1f3-485e-8e02-04a12074e2bb.json and https://artists.proofprofile.net/proofs/artist/14a6639d-b1f3-485e-8e02-04a12074e2bb.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 0xe172db730d407340a1f93e3f35ce248e859ed3a8c7039c29d935c1ad2e917936. 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/HUAC61100227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607fc9bb86b0a982139ae4df985339ee8ef30d45a434b0c4b4a43f230449f0f. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUAC60600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd0d29c795a025d71f29a5a68ccaaf4dcfb5af32562ee4c5da085e0f8954ea. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUAC60700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0219927195243e687bfbf4e288e6981e8fd549e39a585655a3ed0b0a865d7575. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUAC61100307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe833a5de919cd0da53aee29c23cd37115172205a4dd19d2a9d60283bb05ebd48. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/HUAC61100226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdafd0d29c795a025d71f29a5a68ccaaf4dcfb5af32562ee4c5da085e0f8954ea. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUAC60700015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3c51e961c7e99e7dc6d2f9c3f8a986921e70f53ff4a90a8788d2fa94346973. 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/HUAC60700016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0bbac0d234b9b174b13809f600d1f14e9b47fda82d8481851750048fa39f09. 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/HUAC60700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607fc9bb86b0a982139ae4df985339ee8ef30d45a434b0c4b4a43f230449f0f. 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/HUAC60600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7de45153bfd96a0f4339c4d3321851cc16051c7253f2ceb9f8a7a9d191b30a3. 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/HUAC60600706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960feb542d3d42d314e807491000315e6de44308808e22fc0d7e7053f3702c4f. 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/HUAC60600707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a6d62ef80d31e0c16893df7f196e316361ea3c77a25e6275702ecb4f85154ed. 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/HUAC60600711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9101396132e510549ef237d91fa2938cfa4ab6d18026bb002ccce28606b80045. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUAC60600717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa56369a4ac50fa11b5a976be363ed39714e28a6b201800293dc670a0cfa3f0. 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/HUAC60600721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91b67da77d8f206e7943cf4ebee7c6e347b901d95234be0322a84571b57b3e0. 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/HUAC60600655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20ba60a96e4459430ef4305e4ae9496303c3691da94a186ea8adb2955cb54c1c. 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/HUAC60600656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x843628934911dbd3feb90503b5235aeaa3572f7a53018a0e7b636f50e42cfb6c. 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/HUAC60600659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1579cd918e7467965604998621c0410b81298c488c7b65eb984be0deaa6a0d5b. 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/HUAC60600661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f8a178d8e00302c06d5e4e73a9c633c564bfd357331c1c07673027e54b1d82. 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/HUAC60600663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9482d957f1ab2cf6e32df876f255a17ac33b206b29a60dabe6e9efd6cb7a97e1. 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/HUAC69800010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe999751928de039dcdacd507e89f1855262e512517de78dcf3682a3f0137df5a. 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/HUAC61100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50879dbffb0bb23314fc7d3ec962c6debd83a535017e13e605b32f142e198d38. 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/HUAC61100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524294448b92e98e28534a9fcbb6c030b8eaddb3ecff5729b5655281d164414a. 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/HUAC61100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572375bde921939cf654a10f22ccbb42384e959664e3e88af3ae1de62ee3a6e1. 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/HUAC61100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x340a342650dcf4d705cbdd824d001ece908c2f776c86d9c1fa85f9507879814e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/HUAC61100299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3a505009d36dd5957da0266f723b8f7353ae5c9a5873f5146e0792aa09ab0ec. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/HUAC61100302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe833a5de919cd0da53aee29c23cd37115172205a4dd19d2a9d60283bb05ebd48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUAC61100226.
Új név egy régi ház falán (with Ildikó Keresztes) - duett Keresztes Ildikóval
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x089104e7c8dc7d7920e3219b850b31c923c75c6a114056a69e922d7aaff8ae50. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/HUAC61300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd607fc9bb86b0a982139ae4df985339ee8ef30d45a434b0c4b4a43f230449f0f. 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/HUAC60600186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce10f799e76e84b072924a6e4bca2034aad32c5c24d3585fd7c308f9811d5c84. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/HUAC60900589.