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 0xa7fad3e0e3991b83c642ffc54de853520ed27005dbe439b6096499b0ecce6d32. 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/4783ef14-f47d-4704-b03c-6670d49f153f.json and https://artists.proofprofile.net/proofs/artist/4783ef14-f47d-4704-b03c-6670d49f153f.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 0xf0bf2e25a0c9d1b006bd2ea4f0a37be3a7afb19bdc804ba228838e130eb34fd2. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T09:30:21Z), 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/FR0U91400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc30caa1fe05d213acbd0f794affdd53de50f92c17d6f94057788421f7ed9f45. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/FR0U91400780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa673e60678021fabbce1c27fc8362a1d3b2e3a2ad4880557c18fc66df549eab8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FR0U91400781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x582ef6a2033d79817084f6eae76b38b7b13c3f010ab1c4641db2dafae112ab02. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR0U91400783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc46cdf49679d3b83473ef50cbb9282b56aec36fa2098d63169dfad35ea2dbf4. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FR0U91401092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63c275ad8631a1bfca74da61c94654d74e2284edfa378d2e98ea297127ab1a3f. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T02:04:25Z), 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/FR0U91400791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff24fc3f3c8c90d3440d666f659e41543f3da8e7121204fa6ec7eaa074734ac. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:10:49Z), 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/FR0U91401097.