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 0xe18defd8a396dfa17ae53d7fc0caecba83250ca6da1aa80d1ba03cf02d2c8a82. Chain 2 (Bitcoin): anchored in block 953777 (2026-06-15T11:52:51Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d2827f22-7cc9-4289-8f06-2beee621a85d.json and https://artists.proofprofile.net/proofs/artist/d2827f22-7cc9-4289-8f06-2beee621a85d.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 0x0454a67fcd40ca2b59ce067607bb59e92f5a3937493a6b6122dd439b3fbba002. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ62531163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ff85d84825907708854a6d646a3af9d4a864034f76c23850060000c1703d3f. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZFZ72526490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0454a67fcd40ca2b59ce067607bb59e92f5a3937493a6b6122dd439b3fbba002. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZFZ62531163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ff85d84825907708854a6d646a3af9d4a864034f76c23850060000c1703d3f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZFZ72526490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ddc8c1102b8b43b26d5ef9b02f36c360d69fc8eb6fe63529c9224224de90ce. 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/QZHN72563181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3d49dffb407084beb2c1d4db22583eb7470356e706d984857db24ac48473e4. 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/QZHN72563182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8235fca72b0c5962510f00433c505764526a8b0ae672152d75d1c0aad50bf8d. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZZ762448635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de9027bd7f5736038b5b1c09ef11cb29c68dd2dc195d36a2db7bbc447957338. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72563183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f4c8d3294016754c07ba0bdef1d55804ebba4fb967d15ff41d4ce7fadc8e31. 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/QZHN72563184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd188ffd6ee34af9cb65cf204e0c6d57b2da97c1b527b7a2c0c7facc6a85f20e5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T14:57:38Z), 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/QZHN72563185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c9bfdcf083f2235a7500355590ffc1ca7d6a1983e7c9d3212fc6a99f7571fcf. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHN72563186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ac911393a42b15c66d2601d9975c500aaecbcdbdc31c42bd252c611118ddf9a. 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/QZHN72563187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20a52af98b21c3528f2fa60eb4fbbd9422ab0fe7e65bf1f39c74097bc4d5bd91. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZHN72563188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe599c5ff792260faea4a6cff62ef41c9c37356379b90e9fc602156c587688637. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZHN72563190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ac20cb8371d686e71a8e08b40b315344ef118289c1894fcd08d0d4b3737215. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:18:42Z), 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/QZHN72563191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbc8629455cbde2b86cc9b8aa990d6bc713f0468710f74ae046ce8e89978f979. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHN72563193.