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 0x369790f29d86d29c09c49407fbe5e3c1ea054b1a80d302185212e40a0a23a1f3. 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/ed58ca03-5222-4ec7-8294-63e491b53f81.json and https://artists.proofprofile.net/proofs/artist/ed58ca03-5222-4ec7-8294-63e491b53f81.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 0x1530a2326c95bcf8acdce2018ab6c0fb68040efe8af835c775a16e23c0a14e38. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:50:57Z), 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/GBKQU2033516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c387521a50fe7cc8ac1a6d3fc4c5924e82c6c69b70aa2e79dd635b96d17dff3. 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/GBKQU2033517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88dc4824ecc2f21041f396bcee5caba19455e6315c92036debaffff4421bb43d. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:29:45Z), 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/GBKQU2033520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1116a7dc2e4481e788c4d8281d812a0db6d4c961b40d2349ec37294a4706bbf5. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZMHP2015105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2374fb43378ce97dad5780458bbad663e1a5387ca2a593dae714ce5856afad4. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZMHN2012570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc18442163d617794f022a504c2de778f9681883afc55b0ce79b4e1948df6481. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:10:18Z), 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/QZMHP2015442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e29192b9b3a014bc13aa6b596af7c28dd70fac251c08f10c952e9e4ac0c9bc. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:25:51Z), 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/NL4YD2100354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x443e60fbbde23053efe4aeeba5a779e9c761686d6890ce8eb458b93c55d54ec4. 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/GX4R52211528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa344d0b78da239be3db2842f080749aba96af7027a1c9b6705f0ac3620399bbf. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/QZN882247660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224574884970f7a05424ff6436476ba707fa4c54fc63e5007721fddfa3d1a7dd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TLREW2221059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x560608bf3cc557317987e12951c2f2ce95b3f70562569b64856181b57f408647. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TLREW2221060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc767bb926bea0b9a46a65ad249c3305da58bf3cf56533440f6759858a888416d. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:36Z), 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/UKZGC2201749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5084cf8695a877adf3222959c04d8ee83d1e35f1c608bc3c9f1e5294018b898. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZDA42037063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae9a6f702ca8095de5a95b4a59c2a484d4eadad5c2aa54b4224d17b1b5ad0f1. 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/UKZGC2408499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb168db6fc2c0b6cca1dc63c9f8346f3b3d76b87e476c965817ee733bbcc473. 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/QZDA42037060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e011fac66dc3a2a7e38d694b66b7eb0a9b221884169f7591e5b0a7071d39c61. 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/GBKQU2013371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2539152e1a4ff46a228a99878ca60940a2e960ba576150ba328bac065da8d67. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GBKQU2068330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd68346a79496bc20106219e0d35ea3b038b3cb1ed1a12012fdbcb9b301667cd9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBKQU2107942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4585a76b6c568347318c37cbcd2b78b57908caa2371a08e15481633d02d4c815. 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/GBLV62127960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37e1ccd63a2c31f26c42ef35bf2a8f163b2c43712673fc710b769218e2f2d607. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/GBLV62138331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ae9a6f702ca8095de5a95b4a59c2a484d4eadad5c2aa54b4224d17b1b5ad0f1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/UKZGC2408499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x882f510d6c51b39086907eb56cc73cadaa9ba27b992d322a68925db7a98a4e2b. 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/GBLV62037937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e5ea167aebdafe03525675a6bfa75b27c0af881e28998f3588fb01095f80244. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/GBKQU2129278.
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 0x294e83b3f4b0334636462e2b639478f439636a50a3e8b735836379aaff0d926b. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBKQU2013373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faf3a364dbd160f7e4f8423d47d54129cc800e2c834239f7fdca774545af389. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/GBKQU2129279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deabb9df0b49fa3429e48598f58d0b133b08e08a4389acc16224c84224544f0. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZN882293653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae909d2e469733786d8b513c384963c894907e199b65b9921e9e4b1cbcc96353. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/US3DF2076757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde442d0ed5d41541e5c267924ebcf1dbfef1ac8e452dd9597dd4a2bd1b82dc03. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/USANG2132646.