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 0x9db8281931580d011528cd45164cfb558d27442dd88c371b9cf8b3cd2345dca3. 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/6fa3fbe5-b178-4a49-8e9d-bed4fa924d38.json and https://artists.proofprofile.net/proofs/artist/6fa3fbe5-b178-4a49-8e9d-bed4fa924d38.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 0xc0c4a6e99156336ba81de2ca929af734d501b388dade083e8033d96d32b1e475. 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/QZMWW2347945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42812503b6ab20c4fa630339aae6526f24d06bb5abf9941d4537e809067f1c0a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZNMU2302367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05ca44ae52a3319843952741647cade5209441dc0e927e44cbcd71cd8a882d71. 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/QZNMV2317499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28bebee926e1311a1946fbfb24d37379002edee86362a82f90e7af7a36a3a77a. 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/QZNB82440685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4dba2e3a0a7549bb8d3caf08b54fbd3a5527f8ce94becce33aab7cba712721e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T21:52:09Z), 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/QZNMU2401881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39246382d456d6d4bb37093686b4985b672e53fb1dcd54fa2e201d211128994e. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNMU2401882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe196c8d915e0ad04b5c5baf1a4a656cbdbec24720bca55f9abb974071afb3360. 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/QZLL92504547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f00148ccaa9c257213a09a8671add899714260a8d13c75ce93de01904eefbd3. 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/QZNJV2541580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f99de83135968edd680f72faa9c4e05d165a69bfaf5ccc35b02ea731674352. 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/QZNMT2513225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1450c671ac38792180f25b34ec0d8a5e983d7b57e363c4251dfa2be56587a35. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNMT2513226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed5a209ba211e2a7f3a61a74e052fd1079df5f737757957c6c8a67e20581ade1. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNMT2513227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a36c856c953f364777ab8965ebc74332dfc9947abbaacf612a7593dd605670d. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZNMW2404086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dd1167aeb1ab23de61c3ddb702f82020282d525e8a8e485af306c3b0690f81b. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZNMT2513228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2703951eeeee7b520312203b1bf90ccf19e7205faa18449247764f0ceddcd798. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZNMT2513229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9de263c9de1c7c39e471b488b9e1c62924131a53779248063a86e953a5063a. 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/QZNMT2513230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93628dad319f1f62ce21a38c8f1c1da0968946e39eeaf65edfc16f1c41150e1d. 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/QZNMT2513231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9466243c9ec4fa8c3f4619f2f2feb5c1f1bc59768b73d6964472e63cd9266ba8. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNMT2513232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a74d0e5466c9303366e9d61800f1f4f269cb7abce56bcf581c593228d0d7525. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZNMT2513233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6abe3935c1b8cd0b662c9a921d048fb6a1e64065692bc13cb4a0077d202e09bb. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZNMT2513234.