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 0x7240f583457fae1b0b2b128fea6cbd311dc20ce0d764c51d357ba60672c72743. 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/8e1901b2-5dfc-48b6-a20a-83d6dd91c51d.json and https://artists.proofprofile.net/proofs/artist/8e1901b2-5dfc-48b6-a20a-83d6dd91c51d.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 0x19f62a162e2985f6c5c462c612b1eb77a03f54cb37508d9af14459937a6508f9. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-16T01:27:32Z), 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/TWA231600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1765a6696dfc3df81d6e87c26a7b93c32117aac7854ffc8ba4fdc9f7895fad7f. 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/TWA231600065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x457fa84a305ae1eef149180772dc6cb6c3332484dbe2d731e25601a6bcd8d57e. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:33:59Z), 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/TWA231600033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f4feb72440d87a11fa862fa8e24e48d815d1e0538a57ae750decb83f841ac0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TWA239400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c1bbc1b90db7122d2cfa3b15b3bdc9b14f4727b2dd27ad4a4403da21ae70a7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:43:26Z), 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/TWA239100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x025a3cdcb91d0c61094b6f34c014b67a558f54dc74ea3b33277947229f6911f2. 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/TWA231500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f36fa17d0c50ed4fbd46baf0198d9f3391b0a7fabe926afb795382e3ee983d. 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/TWA239150002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa85a165ae2cd955b26dded284eae3e62889c69077eae584320c553f480ba2d73. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/TWA239400002.