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 0xf7fb0efc2df6b4bfc2a789b0f0709c6b0ae4366c0568321ae643a24e72eb4ace. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f5958dd-961f-4a47-b0fb-a1c1912e274f.json and https://artists.proofprofile.net/proofs/artist/4f5958dd-961f-4a47-b0fb-a1c1912e274f.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 0xfb8b85835fa2a78ca30b56aa2dda88e115d1628e078877e1d5b9418b3ea0ec08. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/AEA3A2114329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac694f08a32f1a25d475ad558283fd424d2101efdbbeab66d7cd059566cf63e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:21:19Z), 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/AEA3A2128770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecaa27f25abb606f51d7085340ddeedc3dabe1b78e0545e5771e8a78fbc8827. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:52:03Z), 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/AEA3A2135633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c6da47d8255a7662034ea2e42825a07d01822bbebff68bdac4b55caff5a726c. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:08:24Z), 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/AEA3A2159926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0ebadd2db06e6c5d82d3bdf34a073402a680645f1224f003cb7fb303f53c9f. 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/AEA3A2150025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273fb66f6c6359eab70879112914bad6449ea2accbc961efb32a105489c6289e. 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/AEA3A2141982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec66009d5939f143a834ff2f968ba7fb81561fbe5c332bc792880a73654d8930. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/AEA3A2118217.