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 0x96f1bff9c59951cd47dfd22bf46b481951071051b76d26d6135127325cf082ac. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/46cd5fc8-4dbc-4186-9d42-9aada9bd325b.json and https://artists.proofprofile.net/proofs/artist/46cd5fc8-4dbc-4186-9d42-9aada9bd325b.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 0x071e74362ca5add0bd5ffc5c6d4895650698b9cdd860715f209e2b39580438ab. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/TCAHQ2366079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1e29a103488bf499afc8f6153cddce587e9a4058a55e4214e319cace2daac25. 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/TCAHQ2366107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8faa8811f702677ad5f60fdce57ac77aa3aa2430b72ad6b507386a1db79988c. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:13:48Z), 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/TCAIC2486947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfbb87eff21fed3986012fa4ede23533267474457c20b1fa939c8e5e93796c1b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:24:41Z), 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/TCAIJ2400241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4589265304024f6371b098527d88ae48e6238492503b36e059fd1d9626b7dd5e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAIY2425418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c6465f0f4f9964eb67444117db8ce1ccba3c563ca5443a03d8897962ec70a70. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:56Z), 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/TCAIY2425556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x308f1e34f2f8dea77884f0e9824bd958319ed4dbfbc4e46c809a8bec8d680f78. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAJU2554207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a19ed54c20361740c1bbbdebd566e8c7f1ad514ecfe605e6deca8b0ef2a284f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/TCAJX2554402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb036eb3279975168146e019ef37d7df46d565eb874bdb99177bea10be6e60a5d. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QT65W2511538.