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 0x40b9bc324ff18661913ebc0a9035ee6a962fdc08aab0b3854ab05ff0845445b4. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcf1a6d3-cb53-4ef2-895b-788bddc078e2.json and https://artists.proofprofile.net/proofs/artist/bcf1a6d3-cb53-4ef2-895b-788bddc078e2.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 0x57050a480bf7dddad0a4bc88f8292cd3cdd65505c680f418ae356c73ed61cc36. 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/ZAU732300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc5a3dbbe2c96411196c2c00afc4676be7653057c1f81dfa33a279f6d583193. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/ZAU732300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e80537cbec6cb89f5def2bbb66037ec9b97594fec178607d8990c04b2af4b91. 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/ZAU732300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43c0643e09dc3e978b64769e49abbd562f7db47a408e906a0962881dc8180851. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:23:01Z), 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/ZAU732300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976d49ddcbd71666526867f5a9d19543e0ac78925cc4638e2784d976ae3e7e2b. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-21T21:37:32Z), 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/ZAU732300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63a67dd47ebccec4f5330b5b2a463799475380800187b4e989dbd0d99148c46. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAU732300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x997432ec300ff81d97f05159f8bd30429cacdee2d622c1cf3a6121e2b5181896. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/ZAU732300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb8cc4c49a8a85452d66abdc158aec56cbd9e102b56351ac574e87ef49941441. 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/ZAU732300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfab9bbe742c5f3e5fcd220fc11b82e57afcb4ade7ef7bc0d243f257a6aba8746. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ZAU732300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedb45ff11f23944b0eb14315f18769436418f8ecf48b756eaea23de21dc69aa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ZAU732300012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824c376c01737569ae4731d27a3ee6f9cab086cedaff4391028cdac911a49923. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ZAU732300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4187d5c34ef2bb7f5b3fc121a66a5b464aec65f7787b5223db88246e92876b10. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ZAU732300007.
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 0x669ddd32a01569bd06f453b56484749581a3546f690852421379ff1ba2401a9e. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ZAU732300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53636dcf1c88baf957be02a902cae5e1b06a1bdd8784aad6520bb31bc5dfdeaf. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/ZAU732300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb8063f1516c8ae88cdfb4a7aa9b8ff0ac4460cf48483b96d909e56118d0ec5. 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/USA2P1445919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4308a8ad82bf23a3e29add44ae1a8ce2e645f9a4737678b7f1f71746b6949c8. 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/USA2P1445922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa526f97f23503b8814cf4692b354c96132cd7c2ea27cc6c8040082bb0475b9bc. 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/USA2P1445923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4743982ce1ab1e00e0f89b817e2f0cec85a1283b4251c1631609cfb749e7c9. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USA2P1445928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c5d12da4d4472b742e5a4fbef8812d6abe9e5984822985881926ee50db7841. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USA2P1445929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb59db90997a9305473ba566889ace04de705060d1e2e8ccef5abf1cb85b6a52. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USA2P1445921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58639f138f0fe74e2b0649ad5bd8809617213d360997660fd4b1764e9da14cb6. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/USA2P1445924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e62b5766a3be03e7a27eef0bd848d26b59d95aa73350ca85c8959c2ce960c9. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/USA2P1445925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa938d490092476e026da9c3370af8331b2d178b23f6465ce5563577c0ce0ae21. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USA2P1445926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaba422a8c8822be68ab5aca86f5a7f9e7071706fd00ea0cf8bb71b8186ab7ae. 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/USA2P1445927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a11089ad44675d1d31731407a02db3cdfa453672105e3c4d1112dd881853f75. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA2P1445918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0533e286ff7e8f3ccafb1cc46a8fb6faf45ac8608294de66d342f4a90d003aa. 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/USA2P1445920.