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 0x554515e68ad575e756cbb08c913d3890eda9741f3edfb48dd8b6596bd74102d1. 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/cf5a886c-b2ac-40a9-9516-8f2706a92c1e.json and https://artists.proofprofile.net/proofs/artist/cf5a886c-b2ac-40a9-9516-8f2706a92c1e.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 0x6c4a85b8c4afea9db64f5e789eedf4e0dcedc4c239343d9a899fa577c70540bf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:08:18Z), 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/GX4R52234217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa661c4ede829c1fde4e317fd740f4c6dc19d390ed2f8008e4964331acbc5b2ec. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:24Z), 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/GBSMU0030701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8104d8eefd75c1a14d11a1af86445d3c11b75e97cf179c67445faa8b1f2c1c9b. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GBSMU0054094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6520c0aa53595fc906e0583f2e01ddc35ac807c16776d9152e4838b0d4815dc. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/GBSMU0054095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1357ffa86363b6ef751bf046106343ac156ee20e1c115aab12cfad4983786b1. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/GBSMU0054096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabeac703e9b5edfc77e68d2a5d1a264ea58d5dbf97e11bfd1439a1027b2b944d. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/GBSMU0054097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x912b1b6b9c585ab669001114258238ca2f94774bbdc878b65149c11b408c550d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/GBSMU0054098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42d8321e19b618accf3827171a101ff7f74aecde88659001289148dee01e940d. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/GBSMU0054099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x084437a9cb0b4f472c373615a2433b4706c54bb67b85c70f177a4d16b859f47a. 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/GBSMU0054100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7954f6a545104dc15f8bf8d039d6d1753d0a31244bf6bf0029a1bdc7d59da19. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GBSMU0054101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b2ceddd93ab833cb7eb51536a6e998c6f7c507f283c7f4d6ebc11c5c7d6486. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/GBSMU0054104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ae5efdbfbc68ec2b5768701b627ff73c2716521c99f378b2dd0ce2c73ab9db. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/GBSMU0054105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6767ccd288e2a56e57d7c07ec75941fb86332e151efffb46be2265499d0c3f1f. 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/GBSMU0054110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f340cde3c3a1c04390ea48481a8724bcd32a31512fc465ea1287b933da981d8. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GX3HH2258258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d84fb7c49efdcc554e0e0cd311d08cc7c2ad2e76f7fe81fcd33eae4b02de85b. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:29:52Z), 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/GX3HH2258259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2956b2eae9bc5f056913827c1c60652b5b82278c2eebd880bc6b8875ffc9241f. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GX3HH2258260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2c01f9924c91923944b834f86dc9841c5d3233f215dfbdc1df6b19de026f127. 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/GX8KD2373827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000079051d35dd7743476a39970473cb7e51b193726c99b76f484ff7cc18ac8f. 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/GX8KD2353161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bd4bc152861b3a7210def7d68f831a64538966e17f3a53dfb6c237a3a991c8. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/GX8KD2300402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4948bbb20cebbd4838122274b0d0bb36ba4456edd5f1820fc539ae0813320d54. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:04:02Z), 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/GX3HH2395657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173ef385b83414b805835fc0206fcb43c85525fdf0e9125448746b9779be2732. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFP2357107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b850c83e8c9be1db767be6f3a7531ef34a95a9ed8c7a892b4be32cc0d508701. 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/QZWFP2357108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e83003adb95f8724d33efd0167a656b5e734cce0ca93650428f354f5b28c7a. 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/QZWFP2357110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b07d4997fd6024134b913cd894e0eff05776a4eb4400060313b1ffbf7861cd1. 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/QZWFP2357112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fb0d27ffb322f22cfaa3c81b82f627e00c182b92362c02cd0d94a85a1bd040. 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/QZWFP2357113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1427444df336aaaba0435896e481b7a436b99966f6cf3bc6e53dfe3c442d6218. 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/TCAIP2442342.