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 0x08725c175ebbe89ea3eedd6c7b688b53897ba904518fdc91a47c0373a2393688. 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/f2aa3f1e-9dea-4caf-b8da-1ce8218deb4a.json and https://artists.proofprofile.net/proofs/artist/f2aa3f1e-9dea-4caf-b8da-1ce8218deb4a.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 0xc862ecedf858cb913ef355e4a29f5d3a884077414367ccf6e90b10c2e5550d70. Chain 2 (Bitcoin): anchored in block 959013 (2026-07-21T16:26:45Z), 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/QZNJY2218933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb475751ae1f397ebfeac965a8ede8525c1836a326e65513fef3949e67afd21e8. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZNJY2218887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5fb44c129bdb38e655eb884cb6e08309f31b4d6e7a4eca179056dfbd7138988. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZNJY2214639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3489dbb13e1ef5867a27ef4a11a8e431095cf9a112d1689ae992b583a7b961f. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:45Z), 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/QZNJY2214640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd32699a5881a14dbe8d818eb6b3a66845cbabb97ceb17b5966d77eb380052f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNJY2214641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x013431f8f20ebae0a22d5fdb9e727611f528f7f55ccd6319a30fe24dc0fdfcf8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNJY2214646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1ec07f55605435d4f95228b5713a0b8d2ea9c7d14907f54124224aac0a9a79. 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/QZNJY2215599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97226abdde1051efa40e0542a88d669e8b49d16c4df9ae0358b54c0b4d0e88a4. 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/QZNJX2296337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be7655651775a33e43d451676126071a04617f4948756ed83b5e262dccae8b0. 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/QZNJY2215973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8a4557c80900a4eb735d0f1f1054fce0efd95d5c5b17e5a5392f2af531d882. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:39Z), 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/QZNJY2214164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c37cd4ad9e124e340b4f629625f6079b289bf8af30c92fa2413f3e4ed459ba7. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZNJY2214165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0746732dbe7f7b53008c51f44b70298ad71918fd11e7f065ce593963ff78db4. 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/QZNJY2214169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75c969015f082d6aeb668b7681afc7951d1d171a536a414914141d403398059b. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:13:23Z), 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/QZNJZ2298140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2848679f04dae3a4291aa718fa6f45cd62859a38b0772bf433e1fd07b1ffe402. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:19:35Z), 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/QZTPX2201586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc883d5bf80b42075e0dcb942f36bf3d3aaf8538da63bc9bab0da6bd28a9d17. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T17:26:31Z), 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/QZTPX2201036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a59aedf33e8ac20bd4f904309d56925ad2f9fcc38ad8a330ee9ca0462b4ab5. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTPX2201038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126f1c1c1a14c8e680aaf7d2e4702524c64338072d5ad59b92870342e45c00c9. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZTPX2201035.
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 0x12142124b8e6588f7779ff7a1af68d2cd1ddc06872c49ea4b2c8fdb3c91e858a. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:42:51Z), 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/QZNJZ2298135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ea33114a4442562a25eb302eb3b97d1cdb5d0353ea11c8a435281b05dc2aa6. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZW9L2258471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54c427a5bee0d07149002d1b7d21cb8aa0da90884af2d23a67579be93fa1afa. 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/QZDQH2357805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe830e5d7c8bd75280b0fe28bed4c3396d91f9517d3029f45000bd6afc809eef8. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZDQH2393479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b5c175b1b01de54e35135ea555b6af44c3f3cbf306a228e8650a11cffb26e7a. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:11:37Z), 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/QZDQH2394587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75804abf775d9aa2b25af55066c667d8c2e659ba604a95de2d782c9226e83f5d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDQH2398865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3433a28921cbe2456c1a2473184715109d5f34aab26f0bc9555914f96bdd65c6. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZDQH2410285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb21f762f006886f26055f7e792b7550214c56902ae19cc8ea1f5ea0c24906dd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDQH2411989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf545e768210626aaaba8ae21faf55885c9acc9a251bf846f647e7f64244ae7d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZDQH2412015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73868d12bbcf7d999a09fb43fd6687be9063cc4dd3edf527c49478ea2ca0b88d. 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/QZDQH2419972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd98c9680d543dd88c6e470f2203bd50da08aaab426a6d7fd118108df60d57e9. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZDQH2435581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf75b5ed24996d8b766e6302dd63d2c81b796ff70a4e85f13b3221324d7ef0ba. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZDQH2444327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e260762cd2b92e6342fa3b9c111997ab9652d7fcae02c9e8c6cb9baa2765f10. 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/QZDQH2503369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc153d3478259b80be3618d34410f3adfb87b82e5c5e77b0377634f7c71bdd5ea. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:45:39Z), 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/QZDQH2505204.