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 0x00ffe26ce0bc4f80b6baa41df57b8b3211354d93f79395a2dfca6d32209aa1ef. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ace58964-2f9b-4203-b1b5-37399c388174.json and https://artists.proofprofile.net/proofs/artist/ace58964-2f9b-4203-b1b5-37399c388174.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 0xf81d6d4988c1ae9aec770fbf568efe997d3c87b869ae66499ca85b400b5d2379. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-22T00:40:27Z), 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/AUMEV2215858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x716aba478daae3b088c15c175cb63ce02878cb1a31b08105d36102ff8a5613c4. 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/AUMEV2332425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4a03a5badf3950b7461f5654f89993f8a0a8ce9782fc69c9ef37a3b8f18732. Chain 2 (Bitcoin): anchored in block 959061 (2026-07-22T00:17:42Z), 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/AUGBT2226442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b1d243bde6b0c42ca13d620b5493cc38eb90bef03cc864a9e0e64b2464b64c. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZNWX2176281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefb8f7a80c3fec7334f96a10cd396f0a62ab0179475fa135447365b5929fc372. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/AUMEV2278782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f773f31553c95e2c578b64d5c1919b66945ff08827864563c81fb2c4aab0c8a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/AUMEV2467957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87a19618ebcd72675f91df29320fab1c6d91d8a91513d29397c26ee5ed7ce6f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/AUMEV2543148.