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 0x095c9a5a40a426432342916510c22c618221fc56ad957a87934eeca4501c66a8. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34cad972-8a87-4f3f-a893-2a794ef769f9.json and https://artists.proofprofile.net/proofs/artist/34cad972-8a87-4f3f-a893-2a794ef769f9.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 0x2bbf43ca6391b4044295f190031d490f6114bf6e7183d61cff92598e6f352d15. 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/QT3EX2546466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3882bd2c278e53250a9942c400a08be54c5e64a597f6f4201991dbd8722bf5. 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/QT3EX2546515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab4340043eadb6ea8904ad55a54745f78eac45c0dd70b8f5f40bfa6d403db7c7. 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/QT3EX2546295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe39e4af01441346029f6271b5c9e925bbcb25e3f7a9399fb15a7caa5a4ed864a. 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/QT3EX2530506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebcce64075570bafe48b36432526e30d9f38a575eda404c72cc670224319cd4a. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3EX2530534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5204294f5595a4701fd213793b419b94928239e8461f5749fa69825d88765e71. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3EX2546624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bbe690d49fcfe101ce4ef1358fe6c416ead954bd1b258b803cc11b0139f8e4. 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/QT3EX2530537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59b7fad46ee3a0facf64b20bd47f05ea3e67f18c80e50fc84c7847175258e7e. 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/QT3EX2546231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x338d77356d1937dc0b42bf8892988ec55254fbbc7b6546d5cdc461723d1f61ff. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3EX2546584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0386f3c693a7b4875a223c395a00ac02729c2565d720fcb5420efc5bcb3ff1. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3EX2546485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x404b95ea6836ffb36bed8524ab3f05081b51ff596b17e636ae21f066889a71b9. 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/QT3F42522883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a5e770e59f683dd651cb62fe89ed66d8115212b5b46ecb198d50d32fdcc9d5. 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/QT3F42522894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1be7bbce09c046e53642f4ae3ae9f4e59389bf8618f01682531e7e682160fc4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:58:55Z), 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/QT3F42522899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b2cdad1fa0ad14e6e1d7e1408d353f76129c5c5a68bb8142c5daea323c026e. 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/QT3F42520135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44d0d2f90dfdc4a7fd7ae7c4296191ea75d05aaf63047934dbb1d96197e311d9. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3F42522885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79cbf789153e56f0ab54a819d07680af951530a0244e8c51248bd96a9290ba0f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QT3FE2507396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c185ca93a48fdd777b6878b84ec484d9847908855195a2f88889dbdbbf3f78. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QT6EA2565821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x631c2ba046a51cecee77e6dcaa046c0bd19c923dc7f62af434bef3bf13de6e42. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:46:24Z), 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/QT6EA2565883.