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 0x1af03faed3b065d12ae2b81c0bc3d6840cf281634b7751ebd7d8576263f6caf3. 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/855ed183-a889-4767-8cf5-8a114dadfd30.json and https://artists.proofprofile.net/proofs/artist/855ed183-a889-4767-8cf5-8a114dadfd30.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 0x9f3ee83ed929c8e84a508139575bd6e3fb946e1f8aea10b8bd2d2a3bf6f54d9e. 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/QZ5AB2458950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c1d8420e79130d306ded80e98a6ca9beee0473fc0725808e61a127fa2228ea. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZGLM2486994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe135bd71300043b88dab4332f134ff70e0ff34c0edc56ae89f05ea11c2051e10. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T11:02:39Z), 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/QZNJV2448904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68a9924dec5a5c604c4b064624e651330f19ab685b2c833a575f4903fb46fd5. 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/QZNJY2426977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0700c651da9bd92b1fde90ba8a4854699624ebdabb584eac9a10ff94c228172c. 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/QZTVM2426397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e31cb2e2c3f7ee4e12d81d1f0798d60bf3775d335eeb6286b33e2c6d3674649. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T11:02:50Z), 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/QZTVM2426398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb213bdefa63ced3b6b4dce28ba9dc2763e6168f3418572b77fc4ae1b6937f099. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/US7VG2538709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34d0c57ac7fa447eb14e5aec7dadc7065c08d9768e74bd084b60fdf069199f9e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/US7VG2575326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e8aeff93425fe67eb3d11bd173887a9d45133bfd6a38e37713ea787b331e71. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZGLM2538711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796d4d754cef068ba344503dd8c964d2e4bcb9b3e0f8929914aa3d94cde8f210. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:10:02Z), 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/QZGLS2562431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66b88dc7a1e99acca62d48825bb59ee1e99c511c82982f0a0c59d750dae0a61. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/QZNJY2561709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe46df163411a66c9ca10e37427c7e13d11758fbf364529db767e6f2a1498ea2f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNJZ2562052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27ddfd32a853e22b95759bdc87239978563f9b21a8711d62d27108a41c7edaf2. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QZNJZ2562053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7724d6a2ae6a5ab3a3ace422553ad8feeb57aba798232f71c19a25b181553f. 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/QZNJZ2562054.