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 0x995422499c82bbaa935b89ff9eb22fed64c07d616e1653f496c8a386eb086888. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e6456bce-de51-456d-b96a-0723e0f3fca7.json and https://artists.proofprofile.net/proofs/artist/e6456bce-de51-456d-b96a-0723e0f3fca7.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 0x66a264a6ae8c199cd4023fd87dccfa01accfdda08e05ddf4427c46ed43bfb065. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:28:35Z), 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/GBSMU8321882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f34e6dc519ac6cb6626a715702adef06605c0fd8830efb242545e6253ff7787. 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/GBSMU8321884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9818850c65d5822dcbe8f657fe78c468060be5964fac5b917359d760d875edc0. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:54:07Z), 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/GBSMU8627564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f713c0d2273a1df15b5aeb6921863a553cc3defb47bd5a48eb474e08c5c426. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX3HH2391470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98595e909efa89032f39bb84c784b9f5dbb52d42c0f97d8d25de4fdd2daa3b24. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:08:48Z), 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/GX3HH2376779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c62a81eadbc1c55ffa5378459637cf75bf85484353fe6e4df5d1d2a95a300. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:24:25Z), 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/GX3HH2366563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed9765b995d563201ace8d79fff0b4452814b3ecb4c10139a218b1d02927ab. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T05:02:56Z), 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/GX3HH2356461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcebb3487c6db31798d5f66f676c33efd51a6b47234d9cd4a8994bdb58064b94. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/GX3HH2346260.