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 0xc5ab0bb3d57e47548b163cc94fc0ff00928703e0c106b27a39f4fd3f6bbe899a. 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/fd77b486-2fa7-4e54-b0d3-4b2f27d9beaf.json and https://artists.proofprofile.net/proofs/artist/fd77b486-2fa7-4e54-b0d3-4b2f27d9beaf.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 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 0xc96f4041a11a34626fdd14a83924731f1ef6a2e721a0acc54ef50fa7f3efef48. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA280400061.
Ballada o cudownych narodzinach Bolesława Krzywoustego
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c4c64a36c8ed8c7cdb38e5a5520b915f1d8ef2f610f2eb8001df8ffe1c2d4f. 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/PLUM70900962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112f553ab7effaedbea74d495418f55f03b61028c801d55e464834fb8ca0f6d9. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PLUM70900964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58babc907b23c52ccab23956da89eb1b36ab780973d18ff3123a7fc6f326ae98. 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/PLUM70900967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e5ae7b70a6181c61e21029a9c9c7193fa8de5623e87263dcfb0a5cc25692770. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM70900968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb640bd5ea30e2c39843829b0ce960266f8a8d5bc1591a8d9e3ca800130e33077. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM70900969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d243606c5333fe68e706bcb4073de8fef9fbac3ff369865acbc1ff7c067503. 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/PLUM70901009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6b71732d026182e59291074c96758304847949256b32db5050a21c63ec9148. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/PLUM70700407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2884dcd7e8117a9985be5c1a502682edaf00980920e657bb8e4ba184255fde9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM70700410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8551bbec0f2b8e59510165ed74b948d9726b5142eca8789843ce0f4d9e9517. 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/PLUM70700414.
Dziwny Jest Ten Swiat - Opowiesc Niemenem
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f972c0d9ed4f2c869ac73c1698d3060638848a40a09d52392bf0b883c14a749. 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/PLUM70900749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ebff9d996581e94b52a5f9f0d0379f457eba24af5d5e8a66b857d6ee3e79fc. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/PLUM70900751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70b7122ce5d85783e9f38361cb904e943629b8aafdb123749f324d1ce72e0a95. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/PLUM70900752.
Dziwny Ten Swiat: Opowiesc Niemenem (Edycja Specjalna)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10af8861a10649b131e24774f35eec682dea225176fcede91a979e0a2e59aa19. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLUM71000714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce838580607973cbd26aa925b1e206f52033cc9a2dc6a40335f705461f535b0. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/PLUM71000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x955d89bcec4c12a2907d6160726019ef01bc8319d8b624cd6d1dcf5adc30a64b. 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/PLA281100352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1df2688d1b1145d8bb10b8f7e5ac60e4bacf5c1fff2f21864996d3618254753. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/PLA281100353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31316401f95bab747aae7abad8c0ff6bcbce111e39443bef7712276f3dec70d. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLA281100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a3f4fc6740ae7775bf3200f0ed3ccc2eb5c62454bd10d9f9d0c3ea2e20a394. 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/PLA281100359.
Poświatowska/Radek - Kim Ty Jesteś Dla Mnie
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96edd8c3dc1fe63ed798ede2d81b3c5c3dba2fedb003d5be28e0575a9f70dee. 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/PLU951700013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee94f1e7fd4e7993c662f7efa31c9125ac5037a2420d23e0e3265d78fb8f5f2d. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/PLU951700001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6c7b862138f009a34a1be4d5421961a0bb14986a6cdfb988fa3d08465753e59. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/PLU951700002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5d7ff2f167c13a73665fa304640d18458cf70288b05d9df39a09263107af85. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/PLU951700007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5dbbb60cd3199084276e98687c2daa6e67145031d5e96ded4a13a7b1977f3cc9. 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/PLU951700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe391cefc7d3bdb18817f2597ec56df532fb8dac68bb98b4a5f301f492580ddff. 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/PLU952000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd7a3effad2f8d72277570fd27b8ce0748d489ebbe309b74a7b0f5465b335fd. Chain 2 (Bitcoin): anchored in block 958596 (2026-07-18T18:42:38Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PLU952200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ab9579eadb0f3ae368d44ca5eeec42bdee8b498c50dc86148950f2d5242c66. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/PLU952300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb4201c9aa7ffbb6a4dd29bdf013c6b166e46a2adbbbc1e299923139f7679fd. 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/PL31T2403091.
Czytaj mnie jak umiesz - Wersja Oryginalna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e24e4f421d1a787febdf81da9c757a79b654e62d5790e5784bda660a93d9ed. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PLI362356401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318ffb8bf41ce539d9c85e427f2550f515031e7acb08da12f8e0a64364ca3507. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/PLI360607920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf748fb7efa6eed2837f9beee9a41051532e1faaba0d69dac19a9e27a02f5a687. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/PLI366299380.
Najlepsze przeboje rybki Mini Mini (vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb049f83fb005c4a85ed79dab54f40af8ca15e59eb90fe9245d5ca7f7f4a48151. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/PLA281300055.
Przegląd Piosenki Aktorskiej we Wrocławiu
Laureaci Przeglądu Piosenki Aktorskiej we Wrocławiu 1976-2019 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338960a29de72ca5ac42f4296eb8a6af3287578c45cc9b6f37a52f385a35e796. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/PLA291800137.
Roman Kołakowski Zaśpiewany (Dobre Piosenki)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7775e66b013ae0bf1f59b6d7ef92294502052713bbb75c00307cbbcb1138c47a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/PLB171600559.