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 0x7654401614552bbf0db072597281beb9537f6186b59b13108e1b349a7bbc1935. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c02304e1-0bdc-463b-bae4-e1c9bd00293a.json and https://artists.proofprofile.net/proofs/artist/c02304e1-0bdc-463b-bae4-e1c9bd00293a.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 0x15db6ccac36b0ce9d42eb937b5b9faa2b235fb955571ebd0ce9ca119eb089900. 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/USDHM1406564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435cce9e9fe0bacf44e8f6dcdc892f3e5ece1ae3b685ea786438dc03ae076c5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USDHM1406567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab72b3d46972e83ec7182cae0a99aa195eef27eb92ed2bc0f1e35a550f2ae5f9. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/USDHM1424370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b101b2dd763a1686b9faf10554092ad46b3523eef23ae557de4774b6e3a009. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:07:47Z), 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/USDHM1424372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0faa3add8f5f70f81a9c10e60ada7f86c433558a724d20045903c121e21b3e0. 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/USDHM1424374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8101014798e51f34959698d895726193746f1c69cc533b8d196a1698f3d49e. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T05:32:19Z), 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/USDHM1509767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030e5510329e0b709413adb4a1c87ba47aba625fa921f2e5eb520dfbfe46ad2d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:25:05Z), 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/USDHM1509771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3187b137dcad3b439bb7b31339a9d8da91a7bdcbf18c36223f534b926b7b2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/USDHM2118573.