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 0x848af4e3ab1f9e60903b8b7029f49f29a2e80d52321fd25d3b87a66697851444. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9d4e6e00-06ed-4122-831f-b35db8b632c1.json and https://artists.proofprofile.net/proofs/artist/9d4e6e00-06ed-4122-831f-b35db8b632c1.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 0x45bf93cd0b56d1697d94eea51f85c0fd94072b83a27d8b6e250fcf99e3805e58. 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/US9CY1700756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x682a20c1b3f04ed138c31f29934fd29c38764b6c488325304993c6c3f36ebd29. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T08:27:24Z), 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/US9CY1700761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x893e3b705218ea655dc762c76a3beb18d1e1aa62c2431682a053a6eebe21f5eb. Chain 2 (Bitcoin): anchored in block 959052 (2026-07-21T19:50:27Z), 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/US9CY1700762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b89827fcac8f706ecdb4d74eb5d54eec724adb1282b03433c55a96b0b687ad. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZHZ32058638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b6ce53023eacada2116bf125c29ef953b050aa9667b2bd62dba5d71d27e7e. 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/QZHZ62044478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363b6ce53023eacada2116bf125c29ef953b050aa9667b2bd62dba5d71d27e7e. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHZ62044478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d7594257cedab66881ad615a572a7fe7c12d898be4bef76b8fba9f6d2d25db. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZ5AB2110939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f112b310be7da6819c176134bf8ac1dbf35309be09a9d81d49f58a87cea1e26. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T16:00:15Z), 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/QZ5AB2110942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda532bc34003d41cd829fd8ae56c3b88e8e9f8d77f9b56589244066055c217b2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/US7VG2141539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e934e9713dbdbdccfe52edc5d99eb277411fac518be451d5239d727b32df63. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-21T08:58:34Z), 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/QZW9K2257039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4537fc09f367479738ab38f4c6dfdb00def15b7b77513c3c1e582b3bc117a681. 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/QZW9N2215970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998bb4ed95effeff88af81eb3abef63e5123305ca40435c8e8d8a9bb7e9e9fd3. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:39:36Z), 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/US7VG2324580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e84353b7202f40badc7b7769fd886b494ad572790717167bb3393f012a19403. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/US7VG2324581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2016557718649545fd724e85c6b2c1541dacd781c039ab319ee752686f8d5c72. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US7VG2324585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6c6e5bd99c1051d651ba5ab22d9cfb0609540d8a0c7f9e9a01084ee229720e. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:59:15Z), 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/QZNJV2351543.