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 0xcb22fc2a61e1f4ff5edd184cca3bf42100102854892797aeb6b6323b0907f51a. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/24189bbb-97d8-4db8-b707-304733e7744b.json and https://artists.proofprofile.net/proofs/artist/24189bbb-97d8-4db8-b707-304733e7744b.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 0x9bf4f36c8223b43d0a81e4c2c5c5414a8e5cd0c3cde8f6e72aef3f50538b7067. 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/MXD781700480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeef0b7913d9d7aeb4513a40abad8a3e1f3bd18cb3cba67989bffbc7830e4d733. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:13:32Z), 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/MXD781802764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbe07661f384c33ccfb4e3a68032fd11d508e21eb7c123dace2ce08eb318dce8. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T23:14:08Z), 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/MXD781800659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c47043c4cce84948d5296312316c18f6a77ee38bf508807c6ee2d6e6ebeef1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:30:10Z), 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/MXD781803976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35fce105454ae03ba4933829a10b4d2c118fb8ff965fe45e1ccdd1f75528b236. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/MXD781900239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38e4bacb2ff563a84339113c5d28b47d9186fe107b9df9a33163e3fa9cdb8eee. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/MXD781901983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e60792f9698d8276d3a53d69eb40676f06dee16aab9d4a618e1a5e09544db65. 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/MXD782003626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9577a2e26f82288c318ec50d459d0d075a77ff065ee0cc939f0ccd3b8d181325. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:24Z), 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/MXD782003629.
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