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 0x816976b940cb76034c5027cb15287cc1940c7b77453ecf0ced0d65cb9e00353c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f8c0af97-61b8-439b-a9c7-9336f175d0e3.json and https://artists.proofprofile.net/proofs/artist/f8c0af97-61b8-439b-a9c7-9336f175d0e3.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 0x68ebf757efec8c50afbebd94abb6e32f988c5b81e42b89ef26ad7b523011af22. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZMHM2367408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d6f710235d16759e0caaae250ec00dff9996c9d4ca4d64a58d76dded77d3ba. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:32:11Z), 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/GXF9Q2597316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07a3d93914fbb9ad927d2e8df963add6d5f832c4e38b083ec0f5448cc182105. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/TCAJE2583099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4ce5a77ab672139c8087dd7169f9f2955a9cf9505183c707dbb06a2e61a607a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:17:14Z), 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/TCAJE2583024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07b7f1544472de89b3c817983b81e76a0e58c38a4f61b6833e4062bcd3b7bcc. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJE2583090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa444852ef82189c5d62c99772ac22c591c160aec980a8a90df116bd32be6295e. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAJE2583076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb664fe83cc2a1f84dede4e95ef52fe5c06a337f53e4dfe04f9ac35dd227e0647. 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/QZNWQ2099457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd9375a13eba7ae3011ecd47fab5a43821f5ddbe19a03d23f3a731079189b8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXF9Q2595875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc44009a2e4d4a77375dbbd3496794e618fc1b4d79370575dbfac248e5281d5. 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/QZNMY2425058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfced02ab5d73e2e209c57e35092bdc7910215cad3751061ddada5ec586ce7ced. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZFZ62385087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf897145ab4258e80fb20960afaa7836d8cf092bd2fcdc69dac0927cf24ce2aab. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNMY2425061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d187a25b9244b4aaf768f9738aa2fe34c5b7032602d8a86a34ceefb2aceb32f. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/TCAJH2534781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad84b6864144d4ed8fa25752c10d33f6285e69b35083ff86cd78d88e2ecceb07. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/UKT6B2500065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88d37cd8e127ef24a9ff6cf1baa90d1ea4d52c88e689e174938fa14cb4df3e31. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNMY2425059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e27d5b5fe9f7d32744e0d88f10349e22a248f097714a0b736faa5d138e0b544. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZNMY2425057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374cc42cbc4d9fe72a55be3a1350b9b16d335ce8533873306322e008788214fe. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T18:35:44Z), 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/QZNMX2478575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92426b7876ffd41b96a4c43df74fdf665a974b55564c9d37bfa53c0499434721. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMY2425064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c64dae62056a437399f3acedf817c88e1fc361da8771f70111ffe8388989554. 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/QZNMY2425062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aafdc151e9558000b62c02380f8378f60e3e0b88d682b3bbbd565ba05f7866. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T09:04:19Z), 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/TCAJK2571835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8c0756a64cfe2645e776d749ce58a0f7868b917da876a8dae21b9b8737fbe29. 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/TCAJK2571844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a32a175cdaff1e1197e92dda7278d360196b527a94c0a517fb001ba87d66571. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/TCAJK2572053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b25003c4a1e86b3da7f23a54dfb79002c0e09ac5331b2e51dc1e7445938c01. 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/QT65W2516827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7167df7f1f18a8f4a4a6a6224e4abc6a9250198781aa97f32fd666d053c840. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GXHND2528561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2792ad917234c0409fafa22b82da527633bfc19eea4f74cd08fa9aec52173053. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GXHND2564824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97672f1ef54ba11417537df782b657bec55969bcaa72c2b0d7ff239116dcd161. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T22:49:01Z), 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/GX53U2629172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd139c5d086ee51e1d1c2c3316e96159e93cfbfdb6c635c0b51fe934092f9b6. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKT6B2300058.