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 0xe1dd35bdc19cff63bf2fc4fcdd4209653610aedf0fb34a67bce1b93fe58b3219. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3f9e00ba-017d-4b95-81ff-f4b2273c8248.json and https://artists.proofprofile.net/proofs/artist/3f9e00ba-017d-4b95-81ff-f4b2273c8248.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 0x822472eaf25d1e0e6dfce9c780405b41e459ebf114dc3b0c58ed67936ea3e773. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2346336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48cfd0a70a9b2ac731c2ccf7b37fd2fdc07bac4821f5cf58c281139f867c3a1. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPI82322640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bc59fe585a037cacd0479a7d57fcbd2cd445383e87274611717116017295a76. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2350516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd764359707fc37370eb9e308f7932bc0d2bcdd5005310d2dd1a6c45ae13565a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLS2374185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf0fc1dab066e624a77e9a4eb33a9ea44fbb7ea84b734c31a2ad94fdb2fee655. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6F2338848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9185bf045965c6527ab83e0b84c6bbbdb112c4bf264dc939e0df64fadd03075e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEPI82308984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56383c39f793ab3f273dbcfca7425156f8f9d724b427e457f3a102a479d09fa0. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEPI82300392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39b5f7e47a085349f938c4ba05938c728d84cc01d84db167d4b9384d370c52be. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BAA052228383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b61a9389186850adeb828a620fe8de5a4eefe45921ac106777f5d5ef7dfe6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DEPI82213624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbb0be8cda95acf09a0d968e3c20232551f134a9f170b2dae471a087cc53460. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2418517.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54602023d408d8adff6aff6e792a6d95ba494d560c0829a715a22345eab90614. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USA2P2421396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462a458d778d74a48f54c8272bb7831ffa1c4640b855ca65cb19fef4ce80cdf9. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/DEMA61907127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9636151356c2f6b33b520df4302ab294fd28ca98a1576f413be8818c70822aaa. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82406367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5593671d2369e17c160561e8454052c0beeef2df0d0b28c008a3c92b1e3197. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES52454278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1342e43ac6f7142d1383e947f857e495fce2124ec272d087b06295b316b1f04. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2360176.