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 0xeffbb5a162d93c159d287b1f72e33c477e5eec740687b1144f528a200603525d. 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/c9b139d5-063a-4038-afe1-bb1505107fdd.json and https://artists.proofprofile.net/proofs/artist/c9b139d5-063a-4038-afe1-bb1505107fdd.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 0x15083f9051b884e86bbf559dfdb6711d523c32c0357744c77fec966bc6951334. 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/QZFZ72381045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce1947179c50a4c450fa7c951308c64ba8e6b3d590fa3b91a18b433850c812d. 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/QZFZ32304168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bb6f42c67951f9c38caa0ada2170e4d9100cc75530cc5370b1e834bc66c087. 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/QZDA62363599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a6521531132744b9d9694c0488e36b13af42ab304babcd1533e1f650f20508. 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/QZTB52432067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc204bfd720e240a9bb4262524e2a828c1e151132827b7cc47366685d6ca1081d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZTAU2428463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7add435223500f51e1937b42a258fcfbd0585f737474e175b05efd18e1dc04b7. 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/QZNWR2434990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5384503dc7dde94a3c29033bafc23a176109379af1905e31e8d3b95dfaf7b77. 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/QZMEQ2413787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8fe197b72bb89e58748cb4e5a685bb8c4fb33f1cf46dc7501e457030d4e27. 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/QZK6G2401507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a743c09d4125157d70279bcfb7b44cdfd01b35b420a914af5d1d93f26b4b667. 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/QZK6H2434645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73d946e384c9c3f6dfdbc0c58d675d890a9bb8b3dc7950e4ba979d4cf3a387c. 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/QZK6H2434646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf677fc6da08c00b34c3d24fdfd8d92b215879bfefeaf918e1c416ed8d9aaf94b. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6H2434647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf677fc6da08c00b34c3d24fdfd8d92b215879bfefeaf918e1c416ed8d9aaf94b. 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/QZK6H2434647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4097184d40d06ff48335e8558aa35dd272101059f4118e50db9fd990d4e3f0da. 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/QZK6H2434648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7be07c240b7c383d485bfb00776aaeb1121b8f4e1f4f7d12e4f4676cec98434. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZK6G2401508.
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 0x3ec8a53e4606e88f0852f7ebe8aced34fe2100796008e0f3e7fabfec454d70eb. 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/QZHN72486626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bb2460f7bd582e61da1557def4a69892659b1e998465b156878eafa72111bf5. 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/QZDA82430802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c53ba9e358a8d4d8f1ea58ad6155d6adcefa0676c397aeac6e25768c49fdd48. 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/QZFZ22433952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30cb25db2c185133fe762606a0c193202dbcd513e8d385a554099dfee4d36fa. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZWFR2355596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaec25bbcee884b8da773134c6e1494f109d8f0191b64652ce2f3e91227c34f8. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZWFR2355598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ff3237ca0122ac5506b9d767bbffdfb6a725645531e47791080462a6eef4a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/QZWFR2355597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c8aaf26b8e6850e71e3dde587ab4510bbcd60684f287a15d18ea6cc54f7f7e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QZWFR2355599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25a03c5ec7e1bd58911ca8b6e3487b8feb458a1d296999690529e97829e12546. 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/QZWFJ2337520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e6deabcf0bc40b450b55000dfd09b8c81514302914a55d3ee2859f266938946. 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/QZTB72344488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22139270b3be2186d8c3ca951e4f5d31aa266e785026586c6b498401d7caf175. 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/QZMHL2351373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e95435be398535961aebbed7cc425331a4609697929dba16749f9105f1f87b9. 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/QZRP52348480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29113b1d99a3203de5273569c7b7551a9e297fbf155f97e783d1f50b6d976cfc. 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/QZTAW2308680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a4dd64a1c5fa5b3ce0b6eabf187d195009eb02be4f0280a5b979542331ca904. 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/QZNWU2363876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeedae2f834a3e46ef3e9eeb38079aaa3cc03a0a987f20dddc288413f234cf2f5. 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/QZHN62363423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe784c7277c048197dfc32b18301e80a065e15d88f6dfda47e63e3df404df6fac. 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/QZES72307859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31d054ce8e5469ee071dbb84305fe4333623d1624456e570bd5453f4af261707. 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/QZES72307860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0f96615422efcce8075b9bd52799062911edcf2f877a9e392792b56fc904f77. 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/QZMER2157739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f2166f4a1192f23bad154222dedf3dd3445ce9a65d48f648caefa11d12c337c. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZTAU2173261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c966e76d8fba9abdbc7a395929bd0d3c299916d2034c3e174b9b484bf4eaf1. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZMER2160519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eba88b4c26311116ee570d876bdb4c0d4f65f89c61d6ee51e45ebc63d993182. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/QZMEP2116744.