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 0xf8f7ce921c8cebd17c7ac64ab278dc2e5e3213fa0795791ae15d3f33a233699b. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/02d100dc-3650-44f3-ac15-59240c3ab606.json and https://artists.proofprofile.net/proofs/artist/02d100dc-3650-44f3-ac15-59240c3ab606.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 0xfd02bdbc0dda964822b336c9139fa5f8c2feb7832bc9fdef3d8032a29672992f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES88D2000026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695d32bdd41d2bb78e84fd4d83daa445a3fa5718117e40993aa9058ad0cef566. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:39Z), 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/ES88D2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77a18a60d8115616dd1ad6b7a5167a377e928eea0ba3ab1af413bfbc8f460396. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ES77F2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08efe986859f572acb84c6451e49ef5d51ca4477c4915fcbc890ada9cbce8129. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/ES77F2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9eb5e67a8a4af840f2bc58db84b1a632d17b70792df490c4637499ab012b20. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/ES77F2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd33bb60e0448883886b98d3297635b9793be70f1222cf17d70800b545ba77316. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:10:02Z), 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/ES77F2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e35e5ca8c98c3185155a97f82a6a648e685a42da0d42691b894b5e5c365a15. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ES77F2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x220854ee72aa5bf89fbbba869c4afd03894a4ae52e6a8524773f790546174ec5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ES20S1800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92abe2a37b865b4c96b89698c991350daf7ca9e03589042b446708dd6789dcdd. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/ES7311600119.