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 0x2cec67022f423c7d4fb2e10bf6f1ed6fb1b984d07c2d2c17f86c94c8ec326c8a. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c39dc43e-4569-406d-85a0-7831b8530e7c.json and https://artists.proofprofile.net/proofs/artist/c39dc43e-4569-406d-85a0-7831b8530e7c.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 0x973c76ed79d649a80ab81cf17bd1e65c4e9830791060e7985f82590b9e887eb8. Chain 2 (Bitcoin): anchored in block 957686 (2026-07-12T09:33:47Z), 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/DET279901307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa022b87aea4e0f59280aec74f1f82f83f6c7d74b5238af1ac2e100e1ce7c5268. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DET270204501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0892a0e9da2bd52378c3d4bf048a65220f08310d52d38e036c2b687003fdfda. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DET270204504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e69fa6b26f39105961e387a3b70a6988bb70c050bfd9c086805cafa6a27840. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/DET270204401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d29206bc4ff6a76eac6fbabd9ec85ffb225e7e3c9a9f0a0e48e0911bb74da0. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:30Z), 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/DET270204402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272124ccc8e6fce25d365bce6e9815b4c498c9487520011ba262c18d7b6e4130. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/DET270204403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2291bf9e4c9c24af3a75682f5c282c08640fe204da5ebaaa5b5197350fac698b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/DET270204405.