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 0x89ff89bcb8acba890cd12be7d0b11816c181bf16108619e9bc638566df621691. 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/b5af21e4-ce82-4e85-b776-76233a9cc2fe.json and https://artists.proofprofile.net/proofs/artist/b5af21e4-ce82-4e85-b776-76233a9cc2fe.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 0xf725048a3be6bdeafa94683be42d5be957cacc880d9bee13a7c7ff0df7d6c5f0. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/DESJ21700247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x421967bc84f596a326f20ece92ccbb4656a3f11ce671b28dad1b961b6bfd8a1b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:20:41Z), 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/DESJ21700249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf615ab0cf07c2f867c8c8bf6672621cf8d3a5c88b46668c8f96ddc80d70d238. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/DESJ21700252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617eb367a3a5e342002fb81ca080af222ea43985bd12dd610bcec13356fa0d34. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DESJ21700253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59c49b7f2ffea69ca98e8f2a1870c35450bbe1956f43d17c5fd3c3702140de51. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:22:10Z), 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/DESJ21700256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa8fd72961d080fa8dc72b6bf64ebcf9e355dd187f65859cbf407f8d456eb28a. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DESJ21700257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35e44ffb898404d5fa8914aeb4c1148d68ecf1449af7b6ddfb553f34e756e00d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DESJ21700258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976e629798a9660c0c3edd054d0aed9538a2abc34cf366dd00a9e4dddc7f8237. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DESJ21700259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f7e9047948238b57fd6cb6fe45bceeba3dad59179b21d55dc915b56df51b4. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/DESJ21700260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41de1838c847a90921e664ff2521d63603d099e11a80eb140b9ca57ce15007c1. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DESJ21700263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776e50c4e4774137fc85cd10f1c317ae1846e587ddbeb30a42e762cc2a477f4a. 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/DESJ21700264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3165aac35b842b92b8be96fdfd79d4496bdecb762953fb8eeac41e27ff9906fb. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DESJ22100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b2359a10cca324a5a71bfbdeefe88d4057b7f3c47cbfe32bc88341905e9effc. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DESJ22100088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb7005c610dd3ef295eaa378eb295889c96bb45f63235a589ca046fb96a93ae1. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:48:20Z), 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/DESJ22100091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3859d76675296318f9a86652adb8ca6dc6163fa3f4133e358af05fc99ce13bd7. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T06:42:04Z), 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/DESJ22100093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1357290b17888047f5a61642688886ad71896595b5b639066cd57b6a556e919. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T17:36:52Z), 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/DESJ22100103.