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 0x058512c3812e5cbfebd0fb7340d37088cce26c94717302ea448a568cd397c463. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d5dbf7d-b156-4783-aae7-cbaedefaf2a1.json and https://artists.proofprofile.net/proofs/artist/9d5dbf7d-b156-4783-aae7-cbaedefaf2a1.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 0x238c64112f30a90686727bbf629cb03116e981cc7acd2c9df0204b6b6a6319e8. 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/CHF032408613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4be6008d7e7d1985682fb6b79cb9d7639be17503246061d23039c1ccc631be8. 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/CHF032403690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c041eaaccc17a2d4522a924119bef22c3899fd419f8d6414da54a3a0dd11fbb. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CHF032406795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ed412a490cfb9f6d262422264ab9deba5ab736dd18faab4579890db3681f80. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/CHF032403642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5631bb3279142b95666d1c79c50b9f7d921548a4d732d7818633500344c5846b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CHF032403766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc322cf6ba9ac3311c10bdcf4fc29438cce5bf65d8a1e47077ab0be3465a87849. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:46:57Z), 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/CHF032415541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b582d989e55703e6c034be40b5b2fd3e87fe882ed19f8b6dc0f4e9e44a597d6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CHF032414224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92684c153d87b7698ff2433719fbb366e396557f4bbb5f6288da542ef60790a. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/CH6542530606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58be59bc7e4b3870c77465fc9b2c308cd568ceb41812bdbbd21bbee3dcec24a. 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/CH6542542644.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e7ebf3d8ec06d855a51e8f0c08c3abe391dcc01db6bcedb527374f0f9ac5b2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CH6542550504.