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 0xec036413a90091cc230adcd940457fb2e8ffc834ca9702ccd607127ddbde8c9b. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2f2412d3-6df2-4fc9-ac44-a2f5dcf62c1f.json and https://artists.proofprofile.net/proofs/artist/2f2412d3-6df2-4fc9-ac44-a2f5dcf62c1f.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 0x4f59c3275d43e56db486cbbff5fc0ccb72d591f33870df29c9bf153ef67420e1. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBB2385929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16887fb802431f933042db0bb3df2bd8c3afee08df8d49b42c19fd8af54c91a. Chain 2 (Bitcoin): anchored in block 958627 (2026-07-18T23:33:54Z), 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/QZTBB2385930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e394822ac443cfc16e9198539c714d2b862920fc8ed2959cade7e5880d17e4d. 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/QZTBB2385932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd21aa4a8ab948390c5379d3fd43049389f1662a9aa5d09ff54bc973111f44b98. 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/QZTBB2385933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17fe206be590e2d3680bdd61fab9cd782fc158ec929492199f2adc5559f99fd7. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZTBB2385934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62d2a2d81898d46fad01f1680ca7d841d775280945552784651c4791dcc05972. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:51:16Z), 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/QZTBB2388049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6ffd9475e8ee5c3010a9011eba08b77727b887decdac22287c8de38b86fa7b. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:03:58Z), 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/QZTBB2388050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50b5367a7d74af298672985ebe00262e725da8c077da022df71cbdc87c9ebdb3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZTBB2388051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb16bef9551919028f2fedc829be7053a3699e3983e73ec5efe635c07714c7bf2. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZTBB2388052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaccb852dd97154b49e1463780774cb24ab3007b73dd328ae79033676bf3507a5. 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/QZTBB2388053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd42f4bb4b302da1adb57fdccf3c06ee73640f6b1128c6ab01e2cb741c331c509. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:38:41Z), 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/QZTBB2388054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbf9545df11d84ee0f3982104637d722452a0927d924874c1efa6349fef3e84. 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/QZWFG2332519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x248df973b3be92713b1ad69d7a86d1237ce09c662b5da750233596e0d722e613. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWFG2332520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x698d444e051446de005489c79df5f5945e757b78444f0f37831e2703cc74c1e0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZWFG2332521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb45d752c78a61548f228a47ee9fcd79199ce4df41e58ce48ef9e663fc7d3972. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFG2332522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0468aa46708b69bbc07f78f6b508f1cfc51c785dfc9f2239b82861c99bbd6d43. 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/QZWFG2332524.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9d45c7d031c8747f209972c2cfbe39dfeb0df55233612b5beefef6676b8777c. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZWFG2332527.