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 0x37d6a77f95eb244883119d5adfaf4ffb856765954e4f705d5741735b1278b77d. Chain 2 (Bitcoin): anchored in block 954784 (2026-06-22T02:53:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f9f15233-cb7e-4e36-9ac6-2922ccbdfcd5.json and https://artists.proofprofile.net/proofs/artist/f9f15233-cb7e-4e36-9ac6-2922ccbdfcd5.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 0xac4d29fc656619d015d2a98a55e74ac2b52f49d6b0308c8b83485c2a66343511. 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/DETH11400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2018eb911a25d3dcd952d5ffd1d060f5daada4d2e47020aaaa580830cd3f31. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DETH11400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e22ac9f404b65091d8e2cff094cb7ea4293f6214ff00019878ca3af5c76932. 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/DETH11400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61b524f96eeb99753e4962c197b53eba45b541801d82fa0300298770a5a2a4a1. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DETH11400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d25e1e66cbf9ff5242a59b8581762e31e5d40d147157a25ccc45d8e2ea77757. 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/DETH11400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8d30f4bb7ce9fe0f951c695d14ed416af888e48b5588e7dbfebc9422754aad0. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/DETH11400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e8621a3630698ff28edac92ca0341b0807afcf1fbacd8475cd540f73ed1e19. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DETH11400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4741af99be7f7bf202cdd9f6cb519a449b96981258d346d03d3e35c51febffe8. 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/DETH11400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0b9e611e4b94950db78255d38523f7b8fa9d22ca07ef63e184e2f7ff6bf56e. 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/DETH11400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x185e64aef02390eb184d0c5cd70e213bb4eb36964eccf2d2c867454843b2a5b2. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DETH11400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa9af463ceda205b3e04196bb3461b00191b66c9c6ef49438d011957d75950d. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/DETH11400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe567ce08a5085f2b3cfd17626f36eee46cdb7612828eb9eedd7050c1a628869c. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/DETH11400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf824f4692dd7285f3ced5c697f233d9e026d1c111e982cf97ff6ea472f8fb0dc. 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/DETH11400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8399c9eb6fe6c079b2f2f298ea559e866cbe54b6f0613b056202549fb4dd8. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DETH11400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeb2ce3d81dfc171868c3b7b863a9fff0031cfc1f516e96e5b92adf584cea1fc. 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/DETH11400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba5853f22144cbc5f8dfd1541a8b998d5fcb217ebe1d1abd543ac694e84fc141. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DETH11400019.