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 0x2a4fbfefb11cb4e6fcf426345743a6070cfe49c14bfd6fe619e84f5bf959fcd8. 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/0c4a9fcc-ef33-4a87-bdcd-8278800d41de.json and https://artists.proofprofile.net/proofs/artist/0c4a9fcc-ef33-4a87-bdcd-8278800d41de.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 0x3b4d0d891bee0fda8989580142da060e9a5e3592ca05e18d096c8542672bde88. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/QZHNB2175239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b5bd034402a4747c70b06d18dca0c34e15dfdece5f040a9b747e5f17c104dc. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/QZK6M2141079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x544e3d3152a7e473d9bcefb4df6cc5c123406144c9fc71b0e66d5ee9ef045541. 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/QZNWY2198568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcfe6716ca0bf896429ef1f83d3c4a6d12ca28e39f8f3a541ee2d6190cb189f0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:45:47Z), 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/QZTAS2290194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ddfc9e4f5675bcc99fe2dee54b1f53292d7a0d871c84aee7b6e57817366b434. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:50Z), 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/QZNWW2213148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c92ca2785059665a3e30a93784aeef7d6667cf8b0b0b147b2720e9997fd0f8. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZDA62329497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a8f1a2f2e0da11a2b1c08624f2a8b3c58c8d8f639bc9f5afcceec55d120305. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:47:38Z), 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/QZHN62381986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c430b22c4e0a9f4bba9ee08dac86db9d5e15939099ddf6a44a89c7c7fa65cc2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6Q2332983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66e7fe9a202aef3800d7d026b578e9400226a7f0aa2cb0cff3df5bfd72dc4c67. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:29:26Z), 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/QZTAY2340307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980e44359ce3d7e929f9fc102651dfad598815356250610cd2dc08ea572ce821. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZHN72432052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8469ed0d2fed4697674e15914769d61364105fa6854cdbaa85268fece194252. 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/QZHNC2431327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9e926930ed1e49dddcc442cbe1f4eca0f254e34750577cafa3fe02a665d069. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:41:29Z), 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/QZS7J2492907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a1979e5a3536fdbb4226f7de5860d26ea8a6d5b6c5ff4bb1660cea4b41bc0c9. 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/QZS7J2426505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f35f8bee7dcfb5801767cae1246952800124613b5e3f052c17022f91bbe52f7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZS7J2407999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb12dde6370a1944268cffd4667229debd3ac25a45d1d5652188eb7e13d08136. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZSYP2429569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30285c1e3f4df1f8d4ae9d57f8dda4feea85e0eabad11dc9eded7f46f02f28e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZS7J2496593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3441597661ed208666a6749f9dba859676267492cb5494db8031193757ce99b. 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/QZQAY2503118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbc1045f7b37bf80eb7c90d3825b7726cbca863dcc64667dd890d4879ca66ba. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTLA2574305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbd929ee9a3f3c28e8cbcd4e76e3002580f31337d03f657da9cf7379e1686e98. 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/QZSYP2525409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12f56799bfeb269a43d8f57b8ec610a70667a1461a7e3be669dffd74aba64fa5. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZSYP2598999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5eab4f6521cbeae1421e732b96277d6d5ebb691fde3540c6fce106eff0c61a4. 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/QZQAY2598580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ceacf19ea63dcecc4a42d5af3a12ace7ce06bf6a967887a9fea8c54e5ce34c5. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZZ772422724.