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 0xee12a455c09a7ee6a8c5447a00dcf5bb42a18f97b9116713586b3ab6bd1aaf63. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e8f0c427-40fd-43a0-a0d3-0036d4f1fb10.json and https://artists.proofprofile.net/proofs/artist/e8f0c427-40fd-43a0-a0d3-0036d4f1fb10.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 0xc5cde236576f7794706c1a062312a16c09c326b1b0c80848376bd37af37e2003. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHNA2164807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05ead6856677ce57cb04dae1d7087696f9b04f111500477262a63b23523826b. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T15:44:28Z), 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/QZHNC2145438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b28c1bb48a08976dd91da35b670a5c41e9fc3175ad629d27f276a2c0196285. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/AUMEV2410045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5ffb13f47fe8ba0f8d7e4e8a90cc4c4012f4bbd1d337bba65eddea42fda89e. 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/AUMEV2410048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae907b9aad51ce7397f63ddc8d7ed8842e77e47516415838cdca9a5077e3829. Chain 2 (Bitcoin): anchored in block 958971 (2026-07-21T05:04:56Z), 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/AUMEV2439551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796574ed7ffa4723717a9a261ca1b70786986313ce81f6bd7fd5ba8cbbd6705f. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:17:34Z), 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/AUMEV2462215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8df5aaba56111c9dd70ad733c43a241e67edafdb773c0ce00306076fc3d11b2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/AUMEV2470039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe3c8b568c60668a9d491911763d38f5fcf852b21fcc761d0d21c5a24dd8c78c. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T04:51:17Z), 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/AUMEV2489802.