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 0xcaee2b0a64e24729200dfb21967cf80dd38274d659f4b277e0b29b02e2543c12. 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/2e9ee56c-9ebe-4fcc-b0d9-cf1aa70ea397.json and https://artists.proofprofile.net/proofs/artist/2e9ee56c-9ebe-4fcc-b0d9-cf1aa70ea397.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
A Rendíthetetlen Ólomkatona (Andersen Legszebb Meséi)
A Nagy Ho-Ho-Ho Horgász, Vol. 6 (A Nagy Horgászverseny)
A Nagy Ho-Ho-Ho Horgász, Vol. 5 (Horgász A Halpiacon)
A Nagy Ho-Ho-Ho Horgász, Vol. 4 (Csecsemőaltató Horgászbot)
A Nagy Ho-Ho-Ho Horgász, Vol. 3 (Hová Tűnt A Horgászzsinór?)
A Nagy Ho-Ho-Ho Horgász, Vol. 2 (A Megdézsmált Akvárium)
A Nagy Ho-Ho-Ho Horgász, Vol. 11 (Reszkessetek Halacskák!)
A Nagy Ho-Ho-Ho Horgász, Vol. 10 (A Falánk Pelikán)
A Nagy Ho-Ho-Ho Horgász, Vol. 8 (Motoros Műhal)
A Nagy Ho-Ho-Ho Horgász, Vol. 9 (A Csalafinta Csali)
A Nagy Ho-Ho-Ho Horgász, Vol. 7 (Mindentvágó Rákolló)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 2 (Csodaszemüveg)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 3 (Éjszakai Horgászat)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 4 (Egészséges, Mint A Makk)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 1 (Őrült Festés-Mázolás)
A Világ Legszebb Meséi, Vol. 2 (Gyűjteményes Válogatás)
A Világ Legszebb Meséi, Vol. 3 (Gyűjteményes Válogatás)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 2 (Gyűjteményes Válogatás)
A Nagy Ho-Ho-Ho Horgász, Vol. 2 (Gyűjteményes Válogatás)
A Nagy Ho-Ho-Ho Horgász, Vol. 3 (Gyűjteményes Válogatás)
A Nagy Ho-Ho-Ho Horgász, Vol. 4 (Gyűjteményes Válogatás)
Grimm Legszebb Meséi, Vol. 2 (Gyűjteményes Válogatás)
A Nagy Ho-Ho-Ho Horgász Kórházban, Vol. 1 (Gyűjteményes Válogatás)
A Világ Legszebb Meséi, Vol. 1 (Gyűjteményes Válogatás)
Az Ezeregyéjszaka Legszebb Meséi (Gyűjteményes Válogatás)
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 0xaf3d020e68f9ae54e1cd06d7db334cc5b67b6e0daaadd310854ecb859b7a8ed1. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401204 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d127ac3c74709f32a26c8d27790c6659150053b550467e6316120a11f7989a. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401214 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f917dbee0cbee799c278556d194d200b08df8a601a3e2020f1841077c654c10. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401234 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf6ba2c8f158d60c51c43831e0eb6570e279093ba660e4452e97b177f5ff960. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401142 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212200e9c2640a65f523af4482242c1c75f37acaa35ebf8507acaf113bcb7483. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401126 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2541db30312f4500cc4f90bb57e64541ff78f9807b1f94b44af35758d7fd58. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401235 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f29b33b66ea3905712f43f48b0bf1cc299d54553ff6df206292f4338e47a4. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401306 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb53898e9d812941c8c4314e745b0192d9b60ea721103d2719dc6ba3fc1a7b3. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401206 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11fde16c7698ae55629c9d9e81f9195087820654da37050778ff4b2b8b66eb4a. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401231 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b7f52ed29b28e494e1c3bd63c1a76a09b5dd8561a3451d7f35a3be560516b36. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401185 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65cbbda5e3c10c385db54787d76292b18b1803b7f0e24adab8aeb16ccd8554fe. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401301 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39383a273360c1a720263289a9c76f1230af2a25e5ab77071120a222fdaa84d0. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401117 — a six-check JSON result.
Legszebb Mesék Mátyás Királyról, Vol. 2 (Gyűjteményes Válogatás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x690e2496d6807d279c421d3a7e9ebdebebfa7f26f9b5faca0b3bb2e43a31ca66. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401264 — a six-check JSON result.
Legszebb Mesék Mátyás Királyról, Vol. 1 (Gyűjteményes Válogatás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb99d6d54dbcb8933dc9f8a75719099935b42e43cf1834dcd3db79543cf167384. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401260 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0102a79044b7cd4e019c1d5bc81a1f97c41877e076b377993e91b3b9c75b13c. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401255 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed23e51f70fb4e22e7fe5fc1605d26261c63e33ead75ea334d38322cf5e5c76c. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401200 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac3c7f3130bbbb5264231aa40e568bf8f6363cdf5d9cf042c049cf14d62a941. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401257 — a six-check JSON result.
La Fontaine Legszebb Meséi (Gyűjteményes Válogatás)
Grimm Legszebb Meséi, Vol. 3 (Gyűjteményes Válogatás)
Benedek Elek Legszebb Meséi, Vol. 3 (Gyűjteményes Válogatás)
Benedek Elek Legszebb Meséi, Vol. 2 (Gyűjteményes Válogatás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4609a817528729679b38ba412bd02df8d656402662769a740ba502bffac7f6. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401209 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56c538de6f284b8a25beb805a3a94b4409abf79e78d7ccda6c57fee5c48f132b. Chain 2 (Bitcoin): anchored in block 957720 (2026-07-12T15:26:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401210 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239738273fdeca569f2589a0c8d38d5d0a93d0967413b92e364aa92ca0a67090. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401228 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d39d1b431279b90b729159b1dcca1da62c1134f31ec560293d1b41552335299. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401293 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ab8894b161307523af5edf622eb586b8b22c030700b2d90734d2b8d14891d7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401232 — a six-check JSON result.
Benedek Elek Legszebb Meséi, Vol. 1 (Gyűjteményes Válogatás)
Andersen Legszebb Meséi (Gyűjteményes Válogatás)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb667781f9fec81c4873ebdbaa72e39140d2e6479c19f9245593cded6482132. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401227 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d944729b3f622a7c4b15541081c310444bc1dfc89cd2b19c184551c7421d94. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401239 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b96a0efd98ffa7341241ecde42a16391dd8531e4cda9fac9fb9aeadef95b2df. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/HUC301401131 — a six-check JSON result.