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 0x6bdc42113dc9b55fb146573de052c7c669b3f1148eca4df4d52aae5fe52ff86c. Chain 2 (Bitcoin): anchored in block 953808 (2026-06-15T16:45:15Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eff813ec-afb0-4cf5-9029-c1aaeb3def03.json and https://artists.proofprofile.net/proofs/artist/eff813ec-afb0-4cf5-9029-c1aaeb3def03.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 0xf876baff1c163a7ac6bc595a0a8db1ef1de367be0b449a20e7637dfdcd656e93. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FR9W12034407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29eb54da30f60a791f49eb7888135d1ba3413c82c666d795ac723bb2fdea1328. 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/FXQ792100193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6365e403ea21e068907bc77602f339f9824be8480ad12993a3af88c1cf2a1fdf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:47:58Z), 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/FXQ792100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f39b8b98d507b6f4e8e169444a73389ad4f9881d161de648a26c4d8434b3ae4. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/FXQ792100741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b97aa75f6f9a4764e936d4b07b7446a0a1099c09721a9bc57429e6bb64a8bcf. 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/FXQ792100745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa618b3642e98ab243c7b5567cfdc1443c0d579bb7203665c9c2ee462af3b31d1. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:17:29Z), 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/FXQ792100751.