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 0xc9f93ac9425f8bb9e79cbb6484dde58cb0b9e315d4263a851089ba7f11272d5f. 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/5fd2f308-cfe2-481a-9b08-10818928bbc0.json and https://artists.proofprofile.net/proofs/artist/5fd2f308-cfe2-481a-9b08-10818928bbc0.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 0x55d1576b4adfe1d29e6d82969df7cffe66c188268c3de4fa024d5eece018b476. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZD459603802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x599a2370f7b76d1d418373b1ce3e1e6c1db5e991f521b09b628d946c65c8195c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/CZD459603806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdabd5fcb16eb17cdb15ae1d90847eccfa3c0fcf2ae5d476bf84f66b887f27a25. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/CZD459603808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad112bb08b1d2a24de98812bd4e8b4eb8d2bfbbeeaecb9edfc691ad6995d2fed. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:34:41Z), 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/CZD459603812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb950dcb0a8f2c79e05b6dc10051968361ca16a50f5ca08ec1392f11090ac9d93. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/CZD459603814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9f9e1771a9d4a952db9f4a87b584d94f4437ad27d9b6ed4b813886ff461473. Chain 2 (Bitcoin): anchored in block 958390 (2026-07-17T09:35:49Z), 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/CZA759910103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c66ba616f882ce54b77ce4d7717b7cb6a28c17f8f0da156cee773fd2e5722f2. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/CZA759910105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44bcb0caf4d0a1ba01cdc8fab3ca69ad42f80fe6aaa5a57608f136b5dbc3def0. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:36:34Z), 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/CZA759910112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd359455c20946068e4d8ce50deaf3a22da6cae31f04ee2f09c841c775665e370. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/CZD450115112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a6e70d1bdc426da8bf0c4027f6a09087aa8b96eecb7bb208f28e5cce06f00c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/CZA750321001.