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 0xf548e021b9ca5bdf6473a15c161856dd2c8d9db1582ad3fad8eaff3d9a8dc12c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fbd66c55-5c75-4e67-bac3-1662b49d9d28.json and https://artists.proofprofile.net/proofs/artist/fbd66c55-5c75-4e67-bac3-1662b49d9d28.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 0x87215e021595c2bbca9ca25b5cf39d0967943e7486d59371cefb848420eb7f94. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T03:02:03Z), 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/QZNWZ2324234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1896a4794eccdf0af22fd3e41088a45f063436397cca17ab1ce1b9ac1d1334b0. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZNWZ2324239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5f5d1b799874fdb83edaccbafc834639e3c8e5efe4af7ab4b9e83d318052a8e. Chain 2 (Bitcoin): anchored in block 958988 (2026-07-21T09:08:06Z), 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/QZK6P2419471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d5c7f21366afc83e70f85f714209403e0d1a543ad87a68a88714374a651f54. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/GBMJG2504222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087c96fe8a08cd9a89f0c5cac0b7a3aeb8f26f6c87af54d6826d2aa13e6ba2e5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/GBMJG2504223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca9c28e002a3c5be7d93742c02eee94aeccac3b2c5ffe7f9d33797dc7b3395f3. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBMJG2504224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d6059869197df3f2a50af2dd0cae7e8a2b09c9c9b5b49972ffec8e5588df254. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/GBMJG2504225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abbbac3cbb13d4b96a5183a3a7815db63c7d97b34452422023da77160e2e9b5. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/GBMJG2504226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb43cdb56695e335f6d3c935a0fad19e3802347998ecfb0d71369ed390610f3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBMJG2504227.