Dusin () is a village in the administrative district of Gmina Kamień Pomorski, within Kamień County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately south-west of Kamień
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 0x845cbf34c13ce98540a0e8b3a1861bebe7fa1bd859e4710e3eea80d204d7855a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5c94266-cff7-42a0-94d4-24a028828ed7.json and https://artists.proofprofile.net/proofs/artist/a5c94266-cff7-42a0-94d4-24a028828ed7.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 0x8fdded27c0ced929ecad3c63f9dd390dcdc406b87691fd6a8a753a65e50ee20f. 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/DKR642000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1270f0dafe0305d644b229de83ab70ef6d8904b89ab55b0dc376afe30b98a15. 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/DKR642000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c7df93441826866ebef0bcf7842a3142f8a0bdf652b1d00793c88b4b0dc3f6. 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/DKR642000401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224c7b44cb6a4d11ae242fb0354b3a7da29d6eba791cc29295b7f69a009cdbf4. 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/DKR641901802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15083a926a7a859cfe964bc96f53e9e2b869f495479d4468f6e9b8a783b3f8bc. 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/DKR641901801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1270f0dafe0305d644b229de83ab70ef6d8904b89ab55b0dc376afe30b98a15. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKR642000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4c1870fe8f8248c234ded499c3a9225d0d94e49510765b0b70ac844ef7aa8ba. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX281917941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd16095100e5eb9135c4c78e2b54e79004d0773cf67bab888f450c2860b1abb3c. 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/FRX281917942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dea8ddaf1d643ea1b120e24b1ccacc7648045f916a1db8635b469f29d0e5f30. 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/FRX201996851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2143a0553434e42c3e4be8e3eb9c1820b424aacf62d2d82e9a267e4c2af5067d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX281917943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a736b64f8d3a2cf59f8a8b5e442fa149a6753f3a586620acbd18e8f1ce2b51d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX281917945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a3e9fb806983f7e10f6a54c9838782146662504615339e53c23c90c35e1eb1. 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/FR96X1960107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729eb90ac1a074282a2e53b224a4454719f00abed85da8fffca047d7373712e1. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX281917946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cd52d44130833fbbd8c599be96235d9d93e767bc5c4bbd1a14f4c10e7131782. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FRX281917947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f90bc978682fbc35805101f1c046140744056d33074e3608671d0fa9a3801c. 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/FRX281917950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x491b49dcbfa54507afc761264479d137560eba627f0d3193921841090e0cae4c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKJ3C2400104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ee246318cd070ca875bfcc0afce1fa4e2c627b148d2e5be4d7d1223426d84d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKJ3C2400105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56517834f27799434ad9574c7fff82591dfdfdd14484ca4ad3bb67f79339291. 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/DKJ3C2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x177b8e57e302488722a9739573d3aca4185fa1233e4cc612d48224d3db7f0b4b. 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/DKJ3C2400106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x310a4078df4d1bbb710fa03aa92f607d571bfce214080416fc2df03bda612306. 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/DKJ3C2400107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6e9d26e9c0e36383857d52c2c4b1490252ecc0b3999f6c6e632953fce28fa. 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/DKJ3C2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5940e008a5ee1aa4ee1d9d75f0602b4079eb0125d9ae0f06f5e76dbe72dacc. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/DKJ3C2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ed59cf4565e2f517604e5570b3a4080c36419d8f1b6d4d811c2000f69b06e. 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/DGA072144100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4a612a133b0af2c48459dfebe9834f93f1fc7729669d200c90f2bae03268a1. 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/FRX202204101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e90d135953df7b06b4e7ccf52a06e3275832df7e13929a7112790ca5a380c. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FRX762135430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f957b4c753ddbfef1f06fc89a7d7980e9d2825f743b7023e00fef2185fc40b9. 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/FR2X41830437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e45d4ec991873eb16996dee7a7e4b73ac4e8cf72a598abf0b41c7afddd11166. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE3OH1731002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32bebcda162e0f4425279561d624f953bca0023231a12045c36e388bb4a3ec43. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR2X41830438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc92aa999058608e22c0bbb21f9aab1e477776190cd36752c4143ab64d031e7e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DKJ3C2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c6e9d26e9c0e36383857d52c2c4b1490252ecc0b3999f6c6e632953fce28fa. 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/DKJ3C2400102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5940e008a5ee1aa4ee1d9d75f0602b4079eb0125d9ae0f06f5e76dbe72dacc. 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/DKJ3C2400103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56517834f27799434ad9574c7fff82591dfdfdd14484ca4ad3bb67f79339291. 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/DKJ3C2300101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa24ab6e5ce6bbb8764bb7bdec58704475f5b27859913632e429b41f64a5758d3. 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/FR96X1903644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c546149a3c019d205ccb48a1b59f1494703eed2a9820b17bdbc8486aa43d57a. 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/FR96X1903645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09a5eb22fddf4faaf0a2749dcacff053acea5745e25f65f05c9e6a2e35603ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/FR96X1903646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40846180b6d9647062e38b7977d6bbb60735228b2c7035a2111944d33d408c94. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR96X1903647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba196ac3fafcec1c30efef10dc5f9cae07b871011c4303a4e58543c3138123b. 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/FR10S1990979.