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 0x9dcef32dca34dd1457ebddfd68eef0832eb7b6c1b03ff48ac4fdbfe668ce7eca. 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/47993820-c6ae-48c3-a2bf-7da3878bb4f4.json and https://artists.proofprofile.net/proofs/artist/47993820-c6ae-48c3-a2bf-7da3878bb4f4.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 0x3c90b302056070f87f48e764fc475405f74615299bce2e304f7943cd5580b3af. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAU2230856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x497aea087139f8d927d42f917a0399848f57870619e961fdac103165285e1efd. 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/QZTAW2225228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf10298a460971770cd425392e2b6d25e9e96cec3caa0bee2a277174abc20f922. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZTAW2225229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56832893c0e21a59e4f0b9531145259b8ff8c45cbdd92c27a04a9a420a41c930. 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/QZTAW2225230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40c58a715119e35831d31389d91701dfff5cc12e43d0db4958d4c6d544c8d019. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZHNC2369459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7c09b2681ddb5fc880f6424dd3c99fb9d20ccf9f9d43f288a29aae859660b3. 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/QZHNA2479907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c66cb2a90943aee2229ff210dd69da68a7186e591113abd6016d18542cfa81. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:27:01Z), 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/QZK6Q2410902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56a74afeb4af1c6b763d7b2e3a920e40794a28ab52690f9ee621cf2240256ae4. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/QZNWV2485241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95238ff6ad2b294a90ca200385f527de73be94c1550f80ff59386191a88ba98b. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/QZNWV2485242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3da28194ae525d3dc55762f5906a023dd13032644b4118ee105da940e2b6c4c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZZ7R2402110.