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 0xc93600178e740b268eb14490aa20ad418e2482f297d49ac25a7476ba3bb97cf4. 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/e897e54e-f30c-4815-a8a0-42eeed3b2a19.json and https://artists.proofprofile.net/proofs/artist/e897e54e-f30c-4815-a8a0-42eeed3b2a19.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 0x4722101197dae40504d77d5c30f068181203998c628ce6abad6e9b6435d2e3fe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TLVEM2464121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7391163414abb2e705015bb716fa90ec1167d32a22eed362a2d6acd951d976e8. 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/TLVEM2467502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396b3e63e6b5ea2cf008ebd1375053565c60f3a19df99467e2e14aa694df51e9. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:44:26Z), 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/TLVEM2467503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad4c77bf0c28bf09511e1a6e1403cc5966ec2b71bc13f50a7ba44974f77a0df. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZPEW2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6fa2884d6f26b93cd7dbb3eaf70ba5925b89fe1cf893090063dade42504ead. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:33:22Z), 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/QT2VB2480841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16e2a8e7edf7337baf8e3b2d7d5965caebb033c269dc7a7f9db5b22ebf65a4f. 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/QZPEW2542729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae072334ccbd49fb148bbe044dee0a6e6ff1b289a94c77d0d15f6f69c003d0. 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/QZPEW2542730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad4c77bf0c28bf09511e1a6e1403cc5966ec2b71bc13f50a7ba44974f77a0df. 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/QZPEW2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9e16a208dbfab5ce963fc4dc3e7ea92659b3708d1ad41c84e5c39d3058a1d. 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/QZPEW2542731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396b3e63e6b5ea2cf008ebd1375053565c60f3a19df99467e2e14aa694df51e9. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/TLVEM2467503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad4c77bf0c28bf09511e1a6e1403cc5966ec2b71bc13f50a7ba44974f77a0df. 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/QZPEW2542726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a6fa2884d6f26b93cd7dbb3eaf70ba5925b89fe1cf893090063dade42504ead. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QT2VB2480841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90ae072334ccbd49fb148bbe044dee0a6e6ff1b289a94c77d0d15f6f69c003d0. 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/QZPEW2542730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe9e16a208dbfab5ce963fc4dc3e7ea92659b3708d1ad41c84e5c39d3058a1d. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZPEW2542731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86875dabe7b0bba999c95d58a92b4e43d2218c721dcaa4dba5c3461897df4458. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZPEW2542732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fff916c50b0316578edf3f99df481111fbc38d366475b291595d41dc1b17a6b. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:23:50Z), 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/QZPEW2576879.