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 0xe214426de1a5f527c3374374a8dd4e916be7b528f2fc7d83739758f07ca6c0eb. 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/f1e4cbf8-7f77-46e1-9e33-ec6d5d839e0f.json and https://artists.proofprofile.net/proofs/artist/f1e4cbf8-7f77-46e1-9e33-ec6d5d839e0f.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 0xb5ffa7605ad4eb73061f7b90391f8f18a8dcf9e392efb04c5cdab408e9de0838. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DK4P32304501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa7edd5319b889a595c4f3d2b48ba97499444ff4af2d6d07504ea9ad58d132a8. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:02:11Z), 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/US83Z2237388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89ea3d552dd17e9fc4268689a3c21b81257fc1caa9a05f2733c8324e9edd73fa. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2237389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda4d918200b0dafa813bf9a8fd5338b94969fc5fb62c41b4fd7721590183896. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEH742175975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae18264fad5a9308ba9e52f8b3492a5b086407fccd74635f0c1e1a25a9df452a. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/DK4P32103701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7de30ef6891de719d9f6f7554c512355c3c60a6c1b9fb6231218da0a782045. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/DK4P32103703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b4ab70e2a0ee7dc3c92b61e303f79c199e7157d531233f44e8251e9324c40b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEY472080302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4eae91ae40203ebed6a9223f8b60a4a68eccc455009d1a35eeedd514bcfbbcf. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DK4P31801801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f1ea10750d7c12d4b720da5231d119f26a21b8bab334e413eaf49b7cb766ba3. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DK4P32404601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a42ad5b933f69a8f921a043d996ab62ed73fd272df45129b13e47549f677a93. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEY472473955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8295c617abb5729aab187c8cecf807ad9c20d2142442b29a75eb417ee214d8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEY472473956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71c0551a0de81a91294d1640b0c3554a6a7a807ea49aec03441fe6ad3dcc80d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEY472473954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a42ad5b933f69a8f921a043d996ab62ed73fd272df45129b13e47549f677a93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/DEY472473955.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce8295c617abb5729aab187c8cecf807ad9c20d2142442b29a75eb417ee214d8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEY472473956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1ca92380fb68e71b741e1b2d2b40580d3772fa048ad7067dea1d00e15a95e3f. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBJX32117007.