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 0xcbc833b4a721bef83798ec7eab9777543144af0495f17b090b42e9035a6ba857. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebd16886-8436-43f0-b78d-2417a2b1ffe7.json and https://artists.proofprofile.net/proofs/artist/ebd16886-8436-43f0-b78d-2417a2b1ffe7.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 0xd0dbbe902bf044a8c26f3fb4ecf96ab1340c8ec1c71dd2d0f1ec82c93d1f37a6. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QM3MF2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05298d6aa5d08cbc44aef64ab258a53adac07bcb8138f82ebf407837f12fe4ca. 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/QM3MF2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b9a341c538caebfcbe97b92f58221418713666cacab70f10f02b2f3b3803c9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM3MF2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8de2e22f70ec8c0a8a0b30869e26904249f2a8a03b2ecceef7b7486c1b77c4. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QM3MF2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe22d3401959e3c66e45f2b9404f0490ce79290391aea836f8d3a3c4bb6c08377. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-17T04:42:18Z), 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/QM3MF2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5cae3571893f71de7ab4a9fce07b3e1461dd13437d424b980d974c0e45e0eb6. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QM3MF2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a84df172b431d3aaed792a9e4fad1b5d5dc0b9507820e2c5dd5bb6a315ec38. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:47:03Z), 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/QM3MF2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dbbe902bf044a8c26f3fb4ecf96ab1340c8ec1c71dd2d0f1ec82c93d1f37a6. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:07:14Z), 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/QM3MF2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bab3c79d2b0fa70a17ae5a9dfa8bc7131991269362dffcb54cac291e80d6006. 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/QM3MF2500009.