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 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 0x79d4d7b4a733a7a1f278dc83a09882b22c0de02967a26e9aa79ade6e0497b7a3. 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/fa4c2d4e-07fb-4c2b-aa8f-61f4e05d44be.json and https://artists.proofprofile.net/proofs/artist/fa4c2d4e-07fb-4c2b-aa8f-61f4e05d44be.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 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 0xa7691e5d61779d7b94fde65388853ce64a44b2605c70a11a3b2eb01be32e2ade. 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/QM24S1924215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba477e8e77ef2131e4bae28fa07ba0bd15f0e26ca7b3ba69ba4f26e8ff12bc30. 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/QM24S2005585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee35e1523a93142fedacf3b36d074af7f7bdca328e620bed0e8f03a27d59078. 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/QM24S2005587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b3d6dd1da222e854d6b84be5ec79b89978dc49012dbe914f1031f7c0d6250e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T22:58:48Z), 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/QM24S2005589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a3f388fe1c9f711278753d2deacbe8265215f1a7f30a9fb3672a05161e23e6. 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/QM24S2005846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03036403c71b78eaafe16d9264fc880ad1f12fd15b4711fbeedb694cc30595c. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QM24S2005847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4280d62ca58e0da65cb87376558046fb2182bb362815d291ea82c18b899ac4. 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/QM24S2005848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2360645c87b2ec2cd3a3796077f58e9de93fc4d2f160847369b6a9079606521. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM24S2106899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76123e59b6ade96c387566bbcaf25e100f81617684e2d4c0b03f7cdf15e89c. 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/QM24S2204017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bebc0f1244809ce57a16a4be450ad228bd358fdbe23f45629797afb1cb1051. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM24S2204177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x888255983dd9e3fb13f98a7b8a03fa8d5bcf18b0ec5edca7832dfde9a4388faa. 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/QM24S2204176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x019855f369a7354cce9075667e4a58df4c9a03066b37bf0e004cd9dbe3dee6c3. 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/QM24S2204175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c7ed0ce579e84fb0acd2b48acb60e34493f5afccec96060f3ff8da8c3592f. 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/QM24S2204173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9ef82af86351aa93a7c8121f66feb186f4241a3b3d49f7cab872c0824b02f3. 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/QM24S2204172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c238b153ef9d175d1d2a0513095bbbe80dd11b165165ce82fbee0f9b7be54fc. 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/QM24S2204171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980229ac9e7e205832d5233d5e794dac457f3651159405c4dc3add31699670aa. 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/QM24S2204170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7451a509cc21203c039c0b9df3b90f79172e16bb37296ed87b50eacb5a943f90. 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/QM24S2204169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db264aa9b2cd7222059c64dedb00d37f19452ee95d6199b9c0291152a0c5df9. 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/QM24S2204168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76123e59b6ade96c387566bbcaf25e100f81617684e2d4c0b03f7cdf15e89c. 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/QM24S2204017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeff5a642b05167492f6c41c23d504613bf683c5fc67a26803b8af0e8d8ec6ec1. 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/QM24S2204167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59ce90f61eb7dc02968bf3a3dc69c17f607774859c16322914416f277bbdb635. 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/QM24S2204166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af013a8a0948a5cbf07c56812066f85efc11c773af043f69f39e70b2fb13918. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QM24S2204165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x753374f4efae22db6a482c7de6e3ba015e6327a6e4ae94aa76174a75510ffaf8. 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/QM24S2204164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77934cbbb37f0eb82ba814b55bcb35395aaf8c2cf4c3fa086d002214741b8f7e. 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/QM24S2204163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1a491e2876359e35e944378ee94959893be67c48a3c8956f8eb4d53e203f3. 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/QM24S2204162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x802251c56cc71613c03bf9262a208b5947c32181b833195a8c46aa14893c0778. 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/QM24S2204161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99794550c10a806be43b3254301833b8002f3a655a9483dec271570f899ad7bc. 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/QM24S2204160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe796b6acad2b4d87fadb42c29290f7c8a2f4afadc085da8089851013d8da434. 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/QM24S2305625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x863eed6ec0781933759ae0b34fde92135864c4dc07eac65fb9591c357b865352. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2305624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825a574920fbbceb9f059714a19a2e3a4574d66892ceef9f4035649aec2ec4d8. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:03Z), 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/QM24S2305623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9e48309c2ff908dd6247e29e7e93e2835a416b6f38aedfd963004c28ad76a03. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QM24S2305622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbca9b713be439b4f0176171209f757e5d29cab8788dd63a468445e1f19f1d7. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QM24S2305621.