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 0x62bcb51388bb4eeab1708d425b68d44a0c94823a28a3853293c1b2bf556ce248. 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/ef125257-efd5-49ae-aa35-784e50129702.json and https://artists.proofprofile.net/proofs/artist/ef125257-efd5-49ae-aa35-784e50129702.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Nasza Mlodosc vol. 1 - Bo zycie jest w nas
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 0x100ea9429953e03645ca12695f9708061734768789bbc51739008dc124c09d20. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/USJSJ1014879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb14af025f9b19351a6ad0217bbe7c85882e0fdabcef4cbe9e7c0eb0761890dc. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USJSJ1014881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de6d25cda2c888ae3995f5bcd72ef61ba50cf12724f6267df162c4f6d001eb9. 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/USJSJ1014883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed80f84d2902f135ccfbec49efa80583554da19f465d0fe06b20a33b014abbf8. 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/USJSJ1014893.
Kocham Cie, Kochanie Moje - Przeboje dla zakochanych / I Love You My Darling - Best Polish Pop Songs for Lovers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb42af8fdff18b2251e6da82aa04b7b7cf9dbba74ad72a4a229230d70052fa7dc. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USJSJ1015028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ff5fc76529653b2a9dbbbee8173878925820f1b4a35d28ad6d8aa3dfe7f681. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/USJSJ1015029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ca96af211ba78678eefc3b0134a156ccbe1b923ffd72b70449ec8171f02de37. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USJSJ1015030.
Zaopiekuj sie mna - Przeboje dla zakochanych / Take care of me - Best Polish Pop Songs for Lovers
Piosenki Biesiadne - Tanga i Walce / Party songs from Poland - Tangos and Waltzes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf20335a948fbe93c4fc45832cd496e6cf098b5dbcc518abe07795d75b84b3ba. 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/USJSJ1014844.
Adam Malysz - We love you (Adam kochamy Cie)
Polish Folk Tangos and Waltzes vol. 1 (Biesiadne Tanga i Walce 1)
Piosenki Biesiadne - Przyspiewki Weselne / Party songs from Poland - Wedding chants
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9893529110b1ef7f9fb47eb490c5de60f52747e736b063832ee8cddce957087e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USJSJ1015067.
Piosenki Biesiadne - Cyganska Biesiada / Party songs from Poland - Gypsy Feast
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3daf2dbb4c6f990a286b23f122f90671beb1c9262b1fa27a7d5abcf21e602f70. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/USJSJ1015051.
Przytul mnie - Przeboje dla zakochanych / Hold me - Best Polish Pop Songs for Lovers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07ad3856200a137438aef0337ac4bcdd367b56944565efa939f51993e6a94adb. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USJSJ1015020.
Nasza Mlodosc vol. 5 - Bo nadzieja jest w nas
Nasza Mlodosc vol. 4 - Bo wiara jest w nas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785334dd7ce3a624938d4cfbbc52870d9f4cd5a812adb19b1217aa9fbb4b213d. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJSJ1014941.
Nasza Mlodosc vol. 3 - Bo milosc jest w nas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a3bd852e9615dd74169d1a01992ff49567eb5047cd39b5b36579f5bf0f5940. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USJSJ1014919.
Nasza Mlodosc vol. 2 - Bo sila jest w nas
Cyganeczka Zosia - Accordion Melodies from Poland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c52b1152949196c87e3e06a115dd15b9e49f8b3a7590d3353a749330a2e944d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USJSJ1110056.
Gorzalka - Accordion Melodies from Poland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x256d57e0da1ea52461f084085e240c46f7f8bcc6fa9b7a055b4ee7d1eff4f6f0. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USJSJ1110052.
Mydelko Fa - Accordion Melodies from Poland
Jak sie masz kochanie - Accordion Melodies from Poland
Najpierw wódeczka - Accordion Melodies from Poland
Gdzie sie podzialy tamte prywatki - Accordian Melodies from Poland
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6796be3909950c6a75494618b208d1a7642ee807c282d52b9c13a0d084582cc. 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/USJSJ1110214.
The Best of Folk Melodies From Poland, Vol. 1
The Best of Folk Melodies From Poland, Vol. 2
The Best of Folk Melodies From Poland, Vol. 3