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 0xdfe39ba6cf99394752feaa6dd53cb6f8e8129cd342cb05c262db7c358f292989. 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/cc3c9bd3-5c22-44f7-80c1-f12d2946aa02.json and https://artists.proofprofile.net/proofs/artist/cc3c9bd3-5c22-44f7-80c1-f12d2946aa02.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 0x66f5910f25f432efde200f1dbecd2b9a71306171677c7ceaf9ab20873102f1b1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/PLH381700009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd093cdbc1dd0d7eae439e6e935a2c964821a306bc1ce39b14d15cc64545b8. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/PLH381700014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5298cfe7eaf86f54ea008c78b5a35a2d78378c38ab7ca9cecd0bf8b7edcfcc52. 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/PLH381700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b0331eb94359e31de5998699a24edf74b02e36f626f53c08b14eaa4707cf8b. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/PLH381700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810bd89da7f9818ab54d78f4e709337e5c775720ceb311489bc48df1a52b50b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/PLH381700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ebba17285170f932c597099ca01cbff394f8ae34483f63a7379fe95184053. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/PLH381200017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93514f5ed8da4627fcefc350196cd34ff5eb3b59805654bd4d2240a6ae0e6508. 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/PLH381700003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7027d1f67d097abc5b5435be3be537f2d860d9ce8491d48dc089f218d3877728. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/PLH381900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de2256b73b0f52c1be0514149f1bf678b87014e11b7833693d1d751e1426f53. 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/PLH381900020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c0a2587d5886818a4530237192a58b1999eaca39efe2944527fe27f230a942. 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/PLH381900021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73ebaa252f25d5152db0e7a267b154483ded97074abb91efd95b528209c1059b. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/PLR862000454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ce430fe4aeb2f19d807fe5035b479dcfea50261bdc55e61f24e834864a1d94. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PLR862100086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f0cdcf6992b1efe0e799ef39d586ce18c3f6d7921737bcec7a7ee1fba9edd0. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/PLR862100466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x846fce3947e8a20cd2229ae781b31e2859f6e15e11f73cf13f8d67ed0c53ee04. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/PLR862100495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5dd78f4cd78fda3d1edab601ac6ef4c440f8741945cd8189dbecae2c2dc2ed. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/DEAR42257623.
Dziewczyny kochają niegrzecznych chłopaków
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996a0ed96aef73dd4de9012b16f7b3f89796c614bfa704a45724dc978aefad9f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLG961810019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b4ff96d39df03e4e933f47ddd89935e5e92de8e2ded5acda11f33a5f8365e6. 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/PLH752300239.