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 0xb141922750889416d1732f7703cc1a9d9b675948913c1607d101228b056cecf9. 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/e1b2464d-09f9-4f6f-87c2-5fb83c89be9a.json and https://artists.proofprofile.net/proofs/artist/e1b2464d-09f9-4f6f-87c2-5fb83c89be9a.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 0x365240a65dd4b5c5251c830a2f5ac97f429e2235d50f21e34ebb5b857cacdf0a. 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/DEU191400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa529dcce7ab9cee4ab5b1a62ec674557a59e41f8da227f0840b29416e3e9dacf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEU191400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7dfdf4e51499cc132aa25c2c4803d65dca1df01b696ccadfdd209c53cee4f3. 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/DEU191400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5699abd923873c086ea5da07e8b98fed09957139ab15fc960b59989bbc76fe5. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-22T00:46:15Z), 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/DEU191400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb84985b7c75919bf82e2704d2862e5f76653f7e46bdc19d1d3ac389e1caeb094. 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/DEU191400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x298008e1224d7350f8aa0e3423caab160f9727a716231a1bb4a9a8529bea1def. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEU191400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x263063a7e8c9946c99fdca1b8702aeff6e68e57b2b4623bb676ffc3eefd0bdd8. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/DENQ82200079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x102edcb2830376b689d23d914b814c1e8cd47b98e7b80ebfe2a329f5cf68fbf2. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:08:43Z), 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/DENQ82200085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf5978c75a95ffd51591803885d286c4a26dce125f3a501493d1dd3ab62a2148. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:22:20Z), 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/DENQ82200091.