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 0xf6d81367e7be7c8d9093a6ff708372abca8b84634cc29522cf6216e43ea6975b. 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/ce2097fc-b123-4983-96e9-4630dcfd2f58.json and https://artists.proofprofile.net/proofs/artist/ce2097fc-b123-4983-96e9-4630dcfd2f58.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 0xed0958f8377fe8357ec67ec38669bdf7e07faadacd71bb5c3396f3233d7f2364. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/SE5Q52101427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf15eebcddc123ca1a5082bfc810219ec4f35c7cf2d6bc1c40c4fd73cb185c71b. 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/SE5Q52101498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d670fa62d4ef8513c204745f695ad21de882ae8edcde2ae257812dac5a2c59b. 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/SE5Q52103205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44543d01e84520e76eb9e47e9b9a3025e2d80c1efde04a8c24eadfd11c158866. 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/SE5Q52103107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8338ac1d815b4a06cd52bde199baf22f183cfd93b9b47ace8c22666356beaf64. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:39:44Z), 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/SE5Q52104114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f30278de929420fe6fbbb6f59065fb23df6478d5e25612452f36de914ba0cc. 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/SE5Q52200100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c1078c354f050941522f53ffc588321230c59af3e767ff6e524aa797fb29b72. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52202893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ab3572f5e4d111a0ce3542e568cff3f64624f3a26319c4790ab2cbc60cf1bd. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/SE5Q52304657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb371786c3b0c95b0e5f9ac280c263cddd7dfff82896b4688e9c79c79b4e9f878. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/SE5Q52304656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2433488cd4b045f00e4971a974c8cca0ce08c65cbefda3b4f6f9e7ef6ab9b0. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/SE5Q52304654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83853bcd1f7689f9962471685ad4b86188f49b733e32b70bc57e126335ca4a1b. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:13:16Z), 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/SE5Q52304677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c9e7c58e76086eeeb9e482e578fed7f422c944385cb6a740a7fba13381fb580. 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/SE5Q52304649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae9641fbfdc5310ba5987553d85f6bca226bbf541dc1b76902d4179582152db. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5Q52400396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ecd08a9401cb8c4246f2cfbb235e62e3acb718b0b838bea4b0845cf2f8bf52. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE5Q52400395.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9968040003dce04c7bd02b3b722e7900b8b1c56c0b8118bcf7ffb9953803079e. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:30:05Z), 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/SE5Q52401287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8557066c0207a64d90eba31b6c6189b996ca6150247ba7e26c036bddb987d9f0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE5Q52401533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281ff62beb7d070ff76287f213d0dbb3a996c5b405c1ad61747f335d695c3a45. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE5Q52401532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a11af259b61ca7b4c1b7b80b0f584a842ab0d70323ceee78d0136c8b5b3808. 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/SE5Q52401822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d18e48a166e5b527289b497fa9cac2a874b9be0341661b932d9c7e9326a75. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:03:54Z), 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/SE5Q52404067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6315e1bdafa1f8705fc0f54a7c1bb70f49abe11b42b07c4555d0b46e50f99bb. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/SE5Q52500373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f83423503ad3f168716c9bf4fa0752a44eab5229969a2addac3a6082c68020. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:04Z), 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/SE5Q52500363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e44a3f12bd4b9716aa835502df1ca453d355fbec7591d7fbc6ca3fbe92602c. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:44:27Z), 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/SE5Q52501268.