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 0x4d196c257ecb6e033fb3043f8b79d6509665da35d613b3f73856e5ad5e071b73. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9964e9b-8cf4-446d-9acf-279de036ddf1.json and https://artists.proofprofile.net/proofs/artist/c9964e9b-8cf4-446d-9acf-279de036ddf1.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 0x4abe3e4b2b4855a9242d5bef5b85db58dfd6eda85c9785b352f97ed5e2527f40. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/CAN110800523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70813c1e2dc56fabb398e518a4f498deec4fc09d6d59044dd19dc3543347047c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CAN110800527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc60fb8e45268f6c96781b2b8f076b6237e59c646723d0aeb576c983bee50b62e. 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/CAN110800528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e78295a7b84556bab936a5a7c6adf4d4932b5e88abc0ebc5b8a46532c887546. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/CAN110900803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf2105f76868d3fee0cf8588a30cd0b6b4c19328c0b8ddbbc5fafbc8afdbf348. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/CAN110900809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d970495346ea096644707a6d1d12478a69641cac995fe81c84c47822ac6fe72. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:32:15Z), 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/CAN110900807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x673a4eb1fa2853d998cb419273150b501cb551d2d52dbd0d02e7d0064a0b9407. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/CAN110900808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x034dea207eb7457203451a2d577a5411a2309a825de9c14980443a7819419196. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CAN110900802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2e161a6bf1d6882142ee0b920ea53a50b704b5cccb878fa900b335b0309f98. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/CAN110900810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07650c98db713f697300b79a06a6290d1da2f47593c928886e4d2520b9e1132. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T13:26:52Z), 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/CAN110900811.