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 0x1791492f3b7a5dad1c9fbb7d60f8410ff0113eebb91524373eae1f69416dcdc0. 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/1d16d1b2-8c2a-48d6-a54c-cdbf972a6a7c.json and https://artists.proofprofile.net/proofs/artist/1d16d1b2-8c2a-48d6-a54c-cdbf972a6a7c.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 0x47b76eb310106663cf49f3948c9b43ffdd6de87471fe43b42ca3855664ddf309. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:49:26Z), 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/QZHN72054222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e48fe8e461217eab2b552d754a2f20d5da73a176827fa10e4d47a89c07eca8e. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T02:04:17Z), 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/QZHN72054223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60873ab11f8c98777578e8628becf8d4697b08666dd4d0c444c5baaa2b027f8f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN72082174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x349172e30fca5c6d0d7b6cb12647f379e3bc4b5237e8488b62db89cadc9adaa4. 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/QZHN72082177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fff8afb95044d296f0aec07bf71a0552667816ef343fce5a8633d4dc82d5973. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZHN52347698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5df6c79c5163a6fb2a1a1df72fc016e497a4f72c8a751eb81d9e7ae10ea17b0c. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZHN52375177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f72407482ed20079c7d9c664453e727b9c438a334c709111ac77f9bfd3334cd. 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/QZHN52375182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477fa3c3c32441baf8e2d921a960c0281169bc9523ab6caffd8d4477c266e38a. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T05:48:34Z), 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/QZWFG2320623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a312d3087504220b8f18cc75a56d5745abb938b5022295be2b9b75800c4dcef. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZHN72482665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aaa1dbee8f780c9e959f8e368ade68bbede88e464f394a3ea8c20f8bd8545ee. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN72482205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14de491a124e4555d7b56d2138d28f61f640a567a985d1dc011606956f9a3ed1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZZ7W2472488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062a693c135fff3db7f8835fbbf35b88d2a29213eb457ba00bb69da91217ef63. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T03:52:39Z), 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/QZZ7W2472489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873be4e8bf7f615f697a2c9a1dee0d5cb8e060ce9848f48857231d2b2dbaf848. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ7W2472491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c5ac925329cc782d08f3d9f4394b4de26948dd114138f58d81dd7476153b3d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZZ7W2472493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a507bb84acb956319b54833b913f332d626405154a92e185097b5308b6acba. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/QZZ7W2472494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a76a27b8402e43d3b301e9785851ffb2433e91812e6961d3046dc51fac79141. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZZ7W2472496.