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 0x9eb14702a49e434851a3ef148e2c09b14082576e34ce32946ccfb79311900769. 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/79800128-af29-41e4-b1de-dbfaa7ecc071.json and https://artists.proofprofile.net/proofs/artist/79800128-af29-41e4-b1de-dbfaa7ecc071.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 0x30dabb9351e0ab1f7202152b2effa5fdabb7c85837df4d9048d309d7237b5cc4. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/PLI361754950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668329112f6ae4aa5567385edf058795c1ee653a5baf92b4cc2cd9422dc33f46. 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/PLI361754960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4d142069cb693d85eb60f4e17a336fa7529c8330d84f8566117feb568135096. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/PLI361755030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42bee751e5a5deaa01e78ecd3ebd762dfbff99e086059194f44711fe64ba50b. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/PLI361755090.
Agnieszka 2.0 Była mroźna zima (Club Version)
Za szczęście, za zdrowie, za miłość (Radio Edit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35270a8190a50d67403cbcdce5fea2ddb03980e67e9855363f813cb497d46ec. 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/PL03Q2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4178f7d8641e2ccb091b639d7714e3f4724e59fba206cf29ada09a4aa0277be6. 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/PL03Q2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf48096c1232b87d75ad91c013e61968e5f722a2416d25f0147f21f66b5d8da08. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/PL03Q2100008.
Wielka Zagłada Domu Miłości (Alternatywna)
Wielka Zagłada Domu Miłości (Remix 2023)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f76054cc7df4ad9934c234c7cff491830d50043c69bfe4aa85c3ce3b2498b60. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/PL03Q2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ab3eac07c68e21040805ff991d4fb7005fcb68ec5dacccf743b9ff748640e8. 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/PL03Q2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fda4723239390221dd65b1a9a431db34015970e65d2d638e569d09480769558. 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/PL03Q2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8f82cdd383e6cb62dc6a59b754ccd24bbf12e4cc393285dc6097d81b605f284. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL03Q2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e74828a48e9b8969853306b0f078381cc0d83aa5a04b7b6d006f2662d4aac53. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/PL03Q2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1eb902b72353aa0ec4fa6bb9c88b0e95e7555dd88781fac4c2f68c9d6c7e82e. Chain 2 (Bitcoin): anchored in block 957564 (2026-07-11T12:19:47Z), 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/PL03Q2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3328e54eb48dd8196cd62c850c662b36c669ab6d2d8f6beb5f94abf086a30a7. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/PL03Q2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa89e96f64521a6d03af40582fa7a9c2f76ebb5b77cfbc9adb4ddb7a4eba2e11. 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/PL03Q2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x407ab3d10afebd2d17766be1529c1ac815da601c119cf9d2ea4acabad3819b13. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL03Q2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x140a9a8158b5975aa2725a08bc059441a4039b82284e68e0d2c1e087a8f42898. 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/PL03Q2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9f01f70c1987b27f639a535219b96c873b02e418f5fc113339b8520b7ebeb4. 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/PL03Q2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x524b56cebef041adb904d3f089d9eae3bded357fe28cdfca00a49796cdd36646. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/PL03Q2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d43759c7f77e4ef5697c87467a2bccaca25e71ab5963cad31143f63259abb29. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/PL03Q2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d5e066f609866c85347eb1e7ffe21dc609d380d39522b3fdae2bfec0651e6fd. Chain 2 (Bitcoin): anchored in block 958677 (2026-07-19T05:47:23Z), 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/PL03Q2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6151cfb956208e2ee5bd85fc56d00e7cf3e80ebec1c67d54b524e7e61f2fd666. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/PL03Q2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5f5bc9fba9ae91865691661dedeefa79ed3c034b4323df6c7c13d307b77d6d. 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/PL03Q2500004.