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 0x249f540605f36db4ea73c9468d514ba587336935b643ca74f47e40649a2dda90. 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/7857e268-9c7c-4b2d-be39-2cf14fd056b1.json and https://artists.proofprofile.net/proofs/artist/7857e268-9c7c-4b2d-be39-2cf14fd056b1.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 0x8465e433deb7b24b2b99fcbf0b5e72c8e98c93416586cff03be3d2cdee18e425. 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/US7NS1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5afcb53e7ea64083d5ae55f9ca69fc4fbb1b7d38cc51f4e386aec09619953f45. 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/US7NS1900031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc255b8ad7a8009f3e4ed6827d76d25d7ca28a96dd7bb3ba4ab7098797d70a19. 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/ITS251900128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e7f1f3772d2783870e2b89da05db5d6f1ea6de9601e5b87b412036ebf2a5b5. 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/ITS251900129.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e7dc5ca2214cc382204d7538067cbb472bbd69d02330893c8c00a9775c88e2c. 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/ITS251900130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99ce5d3550914f7d9bbd64355d07bc29a6fed1b4a2693d996960aca00c139e3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/ITS251900131.
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 0x287ee5325f7317db21bdfdbc576453dc49672892f27ad31c75c2c8f61e7ded58. 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/US7NS1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca02ec8bc3764067e750a1f7947195c5b20f480ccfc98efb98aa610eeb7ece5. 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/GBKQU1957450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b8ab80b331ed708638dec9061ee31e928e378658840b92a6da01e05d06a2db. 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/GBKQU1957451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6387668bd7454744bf665d5afadf6c609f27ef24aa443131a42716bf21bd072. 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/ITS251900042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d4ced17b24fb15c15a0322731b61c3d0b4957f5ec1edebf64a4a795a5598dc6. 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/ITS251900041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x692ce9b33b21a8d1f7d32981937c93aef0c66584e9a89dafa9d82e6446b804c7. 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/ITS251900040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4305d4d2b509dfd4d0aa6578505db0bdbc672489d745d282273a137f65cd03d. 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/DEBG51800037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ec50d41fad63e95c44d6840dcb152b1bfab7998cc97784271adf85d50e5a579. 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/ITZW51800019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eedf676850c0026748a6daf74b2e8a0bc1b4847f4c706e0bf270dc9d0cab6a0. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITZW51800020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45660589fa23bafe3ca95e9e589a7201f7b146c72aa05de724d8b689e5e8bd6c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/ITZW51800021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95a38da3cc8f478bdb07c87e3f33860fc4e9bbdfc8f924e894edc046991a3505. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEH741718269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0752d4e11b058315417208389b52933d17cb98e209aa561efe993acda51ee2c. 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/US7NS1800014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2816e9fe34d00da4718c95a34bbb7b27740cee745451dd000fad3228d364e100. 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/US7NS1800015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb575aea731dd63c7c29fffaedfda84668293d89876602edc0aa9b11a6f77293f. 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/UKACT1891525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x740dce2e067af51d872430fcee7f47859f1ffc825cf196705643146965e6e960. 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/UKACT1891526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5219a83a6b8257d6da41262aca70344087acdebfc94a09412f021a6c94577fe8. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/UKACT1891527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0cf49070e6594e20212ab5d3e9098989b14f866b95a0d86fbc420234d2c0de. 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/ES84B1810022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea9fd6a635582a4d023c2bd772649124c123446e289fc68014d2c16a9dd594d1. 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/ES84B1810023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0a16487fac455f91076842abd49a64286da87edc89b079f1d97f6beadc3af7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/ES84B1810024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93502253661383cb6e74761e5b1de0b261f5e537af00f0b5e1ac597d7576f928. 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/ITB841600540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d1a5c1d1af3177f3ac72635e844d0c824af520f23db5404996b0a655767a1c8. 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/ITB841700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86266340fd8b9ac0361333ebfa0371e5253d47586202537ccb8545d661b8969. 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/GBKQU1787945.