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 0xf6346d4a7c8fbec4ca963550a9624b72e7d929a7f41c9244897c19d7b10d2c46. 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/72d9e145-a2cb-4957-b7b1-97d3ae43cf46.json and https://artists.proofprofile.net/proofs/artist/72d9e145-a2cb-4957-b7b1-97d3ae43cf46.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 0x5b63173108d29be07a69152f263a33cab686962c5b088769ae85566f89a3429b. 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/QZK6L2375249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x064dd0a81b76f57c5e5a63115c57a844e7decaac4a9925da2a308207fc47368b. 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/QZK6L2375250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc54aae406d1f06eca28de6ec3d1250c8102e95f0a448ef5daaf5cb41cb0dd49e. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:25:13Z), 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/QZK6L2375251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafba797852a495607243a4312a3afc37f03549d88ca292160d9920c1646109fe. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZK6N2347487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7826dee4e8c55014c017be5ffcb168907586394d254da4f6870a90009746be7. 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/QZHNA2324582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbabbca4a5e54a33213b711cbb6391a8dbfc62672f423bf987bbe3e9db10179f0. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:30:13Z), 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/QZK6L2375252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229076553718c08b778d6a7b9f6f3964274dce1afb292e82b0476f49cff39e21. 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/QZK6L2375254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2174c4dfd4c9b035bb34d6ba48227b1d9ed7d3bc0360bd1e272746c9c035629. 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/QZK6L2375256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c236962fd7b0ef69eed5dc41ae1850e7912884703c192ee81ccc196cd5c267f. 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/QZNWX2352580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b118bd95086c966a2b0b2a8c08cf063e7df8d5da634d5ecfbe2700d2c2517aa. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZNWX2352581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fb4d27831f87a6a3d20b9aaf4e5579edf56128c7bdd9581405b0b2e37aae223. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:07:05Z), 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/QZTAT2310683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6db92705f1c4c71db3bddc3dbb614f13ff847d1bf3dc036d8b59afdd60c610ad. 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/QZTBA2338540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47f1f45ba273ebb27d1cfc515b345289dcf7f383c4e8bfd5bd52e6f4ecddd68c. 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/QZTBA2338542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c528abff665b3fc4445e37084e866fe0b7de6c90ba45126ac6a23fe023bd39e. 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/QZTBA2384280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34ad3475ad6a68bc6511f513c66255a24c91899c285849781c8456fd44692b09. 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/QZTB52354554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6bfa0801669454fb32e7c8765915b900fea32a3a9b5d2794ce2262b3f26e334. 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/QZTBA2338545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbcdb9dab8a851de214b5a299e9ecfe9b914b57e9efbf7de8163d8a088e52df. 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/QZTBA2338546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a95e3b184d21c4b1a646fb66167f43db95148e89a523b48c8758eb5dbcc364. 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/QZTBA2338547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e222d73b05dbc5178467ea817e1bbdf3b7848e12279a3fd8774f697d9891c5. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZWFH2332826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb60d566b042008c834d69942af4890f2566b5f1edcdbc9a7891dd17580153916. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QZWFH2332827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28d66cd52945bd2a097f72bef7b32204fce44e37bbc8f5d3e03bbd8635e498a3. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:23:05Z), 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/QZWFH2332828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee718d6bef0ad9c76f88ca2c1246ec0d2c164134bba7251572d7195834c122eb. 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/QZWFH2332829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1216ffb2563ebe0b53c66fa8c4f62296f62217018990fd15e4b21ac465ca8002. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QZWFH2332830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b91fea674a2915f1e969ab0ea9abb6368a315b5e70f5b79790f08d734886e2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:49:29Z), 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/QZDA62479046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc405db82b5fe54e9275471ee9e9bb943a510d20c5b637076c3c54a675bb302. 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/QZES62474875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfcd3f4ca9d84c13b799408942e75455fc0f4e2cd99681fc53df93ad6fed03ab. 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/QZHN62402443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe38cec8a71f2017262ea91a0bffd17a931e3bd6a3da1692dcc622e8f895e1f00. 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/QZHN92402478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31122ceac793b3c7fa059a85107c875bb34ad33893e444412db848c85b8fb886. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:02:05Z), 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/QZK6Q2442579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d9f64871840c9940dd59dfcd8316c08f6f77742ce7886a6b387e796f52a5fa. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZK6L2402662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce28eab50dc469b21e04a21f5446c0fd3e91ba382927d217ea0774aa40665f3a. 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/QZNWQ2446705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a80bfb5ac0f592d605f5437c48f881f5a92dc6131241b108b0e6a38d5f98f5. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:05:05Z), 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/QZNWQ2446709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31122ceac793b3c7fa059a85107c875bb34ad33893e444412db848c85b8fb886. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6Q2442579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f986518f1855ddd137ec451168a9bbb0f93d1110c7db7f68f1e85092840e761. 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/QZNWQ2446710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x173549fcf2cb82e086b3d132f16410c3ac602bb592e844610f845a593f926938. 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/QZNWQ2446711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34bd451530ede8190873c59ecbc3b06d2abe90e6de29b64a0f4e8558a7b2048a. 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/QZWFH2443329.