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 0x702e5e4214eba72be2827ed511dbe9a1b58d72c7ff41a92239b264adde8751f7. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d518d413-8d75-4a3d-b507-3ded81db1899.json and https://artists.proofprofile.net/proofs/artist/d518d413-8d75-4a3d-b507-3ded81db1899.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 0x817f93187b1a717c885e4b6cf11c082b924ac17f03b29a82c3c4a05ebe51b218. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:46:40Z), 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/QZES91839458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8204ebd93c61c76144ae42356b6c59075370377ea82f6a4840431557793e4bdd. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZDA81984305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05af693075b5f0483c7273310684780128541b04438a33b1f400c18803ea7efc. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZFYW1992717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03e83bf4f8501559fcada2608389c65b627c94908b644591af2793262f1216a0. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZHN41918572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaefc9e4707013d43276df53e51d12e95795e269c6c23f4a318a6b1ae42b196e. 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/QZK6M1929798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e5893196c8b44895f1abb485829269c9d10b17ee173d4077260218f61cadabf. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZFZ42043101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7156f0605c3faf1f3b3e461bd3ff4b729449edba11ae646545745a5b62e4fb33. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T20:23:30Z), 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/QZFZ42043099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f72e651d982a82c47e5f8b00e402e6384d056fc769860759e7ec436f710fc0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:23:37Z), 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/QZFZ42043100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbf5c012d18cb844141d097fd28cb13a864faeacd5ab2e7ed0d21b02b5601e2. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZHN32098717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33e8447000cad51131443a68d5821aafc6d6c5e3f873f751a8ddbe2c4a480a83. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:47:12Z), 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/QZHN82078629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37d46969b2ed1a83999543b254278e9a55e72f47bac8dbf7160ec45e8bd074e. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:53:34Z), 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/QZK6P2019949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54cc0fca8ceb54a26d7ca7df32f421f825ad98462ccb15fcd444cde0a0e6f38. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ42102572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7bd6bbed30dc9658a61710e2e159e8fd7c9fc57a6a01cb1a6485f0914566897. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZFZ42102573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75dd3e2ff2fc420ba32434a72bf2fb1e7e121c86169887fcdb86fd3b793ef8f8. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:54:53Z), 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/QZFZ42102575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca569bf7ceab0340f9e18231529bc8c74fcefef0a7137eaf8f4704dba7eb623. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ42102576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2378c6752943d6d9e4e959af65f267d739be297e7cf632c53daf6b776d42cfe4. 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/QZMEQ2195402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd949ea55ec168bd81168ff96ec271d635e548311cfffb5ccdb2e719f9c8077b. 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/QZNWW2194522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49549d84c12219331b2ac4cc537f6812bf3c1c0cfadeb985cb761753f357cd04. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:06:59Z), 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/QZPLS2130101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103afbdc5264d5356f808e9334eec645ae662fd76b771ef07b36fcfe28433e19. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/QZFZ22209875.