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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb05fcfa3a4738b74ddb360480bafc403a6e9c6820ac0676bac0e8534f56c039. 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/d6dd174d-75ad-4429-af16-aa1f34da7594.json and https://artists.proofprofile.net/proofs/artist/d6dd174d-75ad-4429-af16-aa1f34da7594.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1524618c9ae3c3666774ac8b773bd0a7e462084fa7e19e8dc4879bac720dbfb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/SE6HN1951237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd709c548e602912cf0026d57fe4a3ddaf7f5c08ca6ae1658ed926851feaa0. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZHNC1990649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2be7ed4dd4ac38775b4ce5012b4e228e8b0bcae8553f1078055140ed35032c. 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/QZK6P1945952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95e28b5dff9250a73381ef8f19460ebec3b7270961a53c36e67b67922f93b7ab. 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/QZFYX2017510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b20409799f79d0efd9bc95dd4d442307cd951ba4c555e707bee39b978376dd. 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/QZFYZ2089631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x397d9110119d947c9e27a96c8b37fb3b1d16da7a3a1861e96e1877f8db902ee6. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QZFZ72021908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19415c66cc6c9c9e1e2696d2da59bb13a493dde4ad4af86c023c9414d3ee9e69. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZDA62093087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe654e6f93bf2509c6a539b66beed87a1d1f4a5f1747d8c9e4991bbb8fbd8da. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZDA72069686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe641c8d4b24ec9fd65ae856d321031825cd4ab5e31b5823216259c9611fdeca. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/QZHN32002059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08970da46d59494eca0e48e2086b567fdc1c83443daa7b84f82c1abddeb8894. 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/QZHN52067612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c0cdd0b174680da97c3c3d6ccedf5e475edf2b39cccd098431b879ada17aadf. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZHNB2011987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68c1533c2c43e81944b7e93ba1257f04ee008a308aa21b75bde4dc5c2ec2c70c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2340879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x247cf0313219c696af0799be8d64b1b32b0167547af436bfeb02fa839bd7d88d. 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/QZVEM2326329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4834ed34fde533eca59352ac8d2b8661769a12a3841f80bd34d96cc8e32a4d1. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/QZVEM2344255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7618ae1bcc06174a7d484fba96dba84cd23aca2dc25b9d6a5b79e8988bd40ba. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/QZVEM2344256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc00df9a3231c4e4501a3d413112c2eaf91b626506209f765773fc9853426e0. 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/QZVEM2317983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cbe7e89dfc6c91b6b996f9f41b728b70565d21004812d779901d0149d5cf849. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZVEM2334125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a746a073ee42bedfa7b12719c4c0cccbb4f9e50bd717d90cd44e7c9a6421b8a. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/QZVEM2329113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x773c0885ba21887ec3302eff4641c7ec0439aea2030d667baf2eacc70d98e857. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZVEM2368642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bc00df9a3231c4e4501a3d413112c2eaf91b626506209f765773fc9853426e0. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-21T21:34:21Z), 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/QZVEM2317983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe13bc1742cde0eb3bafa5310a29f49b3c6ca1c206d31b21cd2c4d78138563de. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/CH7811113803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d26fa58fb3aa0ebe7569d956726b2f5ea6f5e58a11b49ea1307e70238c96c0. 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/CH7811114398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a56bdfd7db44e9b3ce9c9145cceb5b121b86b564ca8ce3ed9ae28ab89856ea1. 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/CH7811114692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eec185469a0d5120a8751aa2a5f1b828cc5cff7de15a4f7afa5e850e2b1449. 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/CH7811114693.