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 0x890464b80bf747c2f54d73c09bfe2a8c1361b9e0ef2eeb809102866b77b84642. 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/d55ebfef-1e01-40c1-bf1c-689b728ac5f1.json and https://artists.proofprofile.net/proofs/artist/d55ebfef-1e01-40c1-bf1c-689b728ac5f1.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 0x8d32bb36a2fe2b1051ac03c055336293ff470941d654b73037d6d33f36dacf8c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/IL1010004333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42ed568b918f03757fec9df2e02391350028e0764288024a5ed168331f6ac9f. 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/IL1010102998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a980c571267332bfddcbb233439ad9baafd60c89b3d40ca876743a648a7af1. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/IL1010001958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2241701e9c38426c50740aec6ea939ebd66aaae4bc51f029afdae33b4a64c6e. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:01:53Z), 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/IL1010103900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x993366a8490ac953b68d54b7586af55d59c1a969cb4154b666909d3a8cf63a8e. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/IL1010103898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cb7291a1a9d6804c7c1ee5ad04d945ab5acdf7c46ef0329c678bc86550fe9b. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:37:38Z), 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/IL1010103908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x359d1e35c8a563e6619b902c8705be4032951cdccfd12b1899e65b7993e13cd6. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-21T17:25:26Z), 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/IL1011125170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547bc1fce32882557d989d5a8a9b79704f79e19aa0f8dc37642d89f7608d51db. 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/IL1011125171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979fa0858ab1ff12b0bb454db735558362c9844745078087f619c30ef70832d2. 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/IL1011125178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22214c78004ab049fda699847815e9af6e2f0f222742d37362aceda6dd22bacd. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T22:40:08Z), 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/IL5842550709.