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 0x97c4be647692fd8e6ec4af5e8868fb131a9819855f401df40b7b5943d4f874f0. 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/cc9ffde0-68a4-49e6-84e2-3417e7fcb4db.json and https://artists.proofprofile.net/proofs/artist/cc9ffde0-68a4-49e6-84e2-3417e7fcb4db.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 0x9870ff279e81442839066aec9e480bd739404b9580620c56e9f789ce6063ae94. 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/QZW9M2263077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc1ac16278c7942143eac80b118bb38bb80ae4cc1ba95409c90bdf4bf012b5a. 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/CLA3H2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01bcd4c24c4d20e424524bd3ccf77a16d9e8a3995a12f72ff3988e4a5a48634d. 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/QM6P42425725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f2fef46e98ec307bb53a6ec8198e49e278fe0363a0e204224d100ac7651ebe. 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/QZTAZ2235262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28991861f66de10662462d3a9cd18462d4a39545b17aae37478a1a9b764ead. 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/CLA3H2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255fc52d504f2d5159e62bd476c271da6406b5339f4e2e86062a71bc379a333. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CLA3H2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affc854db49b737ac80a4b4500fc6e1c7fa904a62475c5d6f9f22db1119d976. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CLA3H2400024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab28991861f66de10662462d3a9cd18462d4a39545b17aae37478a1a9b764ead. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/CLA3H2400021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6255fc52d504f2d5159e62bd476c271da6406b5339f4e2e86062a71bc379a333. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/CLA3H2400023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6affc854db49b737ac80a4b4500fc6e1c7fa904a62475c5d6f9f22db1119d976. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:23:16Z), 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/CLA3H2400024.