EKT Gdynia - one of the most popular Polish shanty-bands, created by the guitarist and vocalist Jan Wydra in 1986. Ireneusz Wójcicki joined the group in 1987. From the first group the drummer, Jacek F
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 0x30ff9fe7e72cc8c9391f68d7a352962219b1763589fc8727504dab38130eacd4. 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/26e2e678-044e-4f18-bbc7-afcf27d47888.json and https://artists.proofprofile.net/proofs/artist/26e2e678-044e-4f18-bbc7-afcf27d47888.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 0x93613a4801a9cbf7eaff8d7c8aa6d27308cf6aa5ec1e5fe3b24bd9ffbe46d930. 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/QZK6J2141970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2bc4983748d3bddff17c7751fd106e04f4c7e4ee34761beb3f0febce500515d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2141973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54ffd7f63f862f7898a00407c9504d350335d7bb592faac6ad4ba667fe5b68e6. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZK6J2141979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90d78476c81c136d50b0adec2587ec88d28aeb60f3f18408edff978c19592bb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6J2141987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fa429672705cfa21dcf1dce49a9b6e543c7c96f7c460ded8837ef8ed4c38f7. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T11:04:37Z), 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/PLD990508304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b2e318f5a06b354145d8ed3033bf48a7cdacee8454ce2abde502dc08294bb5. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/PLD990508310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bbac9068d0e53d3f753406cf31e5dbcacbe4b7fb2f8c1340b94fc8b3701343. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PLD990508311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620d4eb855a9fdcb7a7936d16bd48f4858a1c42d28517ea70b6eed5d5ed9e1ac. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/PLD990508313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d9e7da436932e99aded8e5d250758f2230ee83ccbf21f8aa7f855aa5ee9d95. 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/PLD990508314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d1123db1f440ffb4248ed90826f1472c8643107ff852d4883595ad1a8ea95f1. Chain 2 (Bitcoin): anchored in block 958714 (2026-07-19T09:51:44Z), 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/PLD990508315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8208e423ce537e8a4e073c7e85c5bd91907539b534b368aa7631f88a1dacd6e. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI369560000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98defa9c3ab1c3c685db589dd105aa6dc4779a80aefb27f3d0470de2caa9f1af. 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/PLI369560040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb9dcbec71285291705f5dcb310893aa0b92bf2592535fcf20fe91783cfc5b3. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/PLI369560070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ef931576197da4db2e93a753a3377a951ebd98e90acd45fd4ae437132c168ae. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:35Z), 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/PLI369560090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6fba0dcc37d1fcf89e9bb46b22ddf4008997079d8b353142508507cc4930ca8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI369560100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x545f9b41e89b9760d7669978b8b9f4115496540eeb4c53db1036eb415615e8f5. 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/PLI369560120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb5eaffbccc1147da9d3cd4bb6e249f3c08cf7cb4226cbfed2bae5f1f94c6b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI369560130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fcd308fe3956dc8e1ffc68e44db058336575830ab68699204f6d93ddee90ef. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/PLI369560160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f285eeaa53bb88e3a42520687e83bfa01d1227fd0110e483d5b93b5c0240f56. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLI369560170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26144f0fc1bc9597f7a4dbda498e9b32d32203c0bfc8990d1dbbf3f2e9d30208. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/QZK6J2153236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f015a17df22b851ed3e165d33cb7597e7c1d4353c310f28e3b177e66af5a2ab. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:44:54Z), 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/QZK6J2153237.