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 0x782051d46aaabfb9981b9a47341e5ec6dbedd569ba5eacf028e291911694c706. 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/4d7e25da-924c-4ea7-aa05-eecb224cb3e3.json and https://artists.proofprofile.net/proofs/artist/4d7e25da-924c-4ea7-aa05-eecb224cb3e3.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 0x7ed5abafb3db2de835d4aee3e69e2d4fcad5505dc69edde4e35ca935093f487c. 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/QZTB22217815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cca8f056f73cea20bebf80a90fb84b38b0fd81b4a8e380bada23213af814c02. Chain 2 (Bitcoin): anchored in block 958644 (2026-07-19T02:21:25Z), 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/QZFZ42383954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf97787fe934a12dc8bce399bc7a93098f233aba2da1b78a1f60b71d4c610f092. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN62377179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x494b03792f5bcc27d454c0f8f582105843044977e4d95f756e33e9cc1556cd3f. 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/QZMEQ2348036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de693fbb52ab2c91bdcbe09b42f2cee8f22ac9abd00fb6306ef4215b99fd34. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/QZNWR2328628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4be3d02f163edf130cc0e53dd911693d9c50711525a44ffee5f2f1b52341d9d. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/QZNWV2359681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25becb8effb9238caf462d3a3fd3ce0f4731784333987cbac66d03c5688a1045. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:07:10Z), 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/QZPLR2356841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167269f24f412f09e82756bc64c214543d34978d666be4107cea57dd4e3d2e2a. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T16:26:13Z), 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/QZTBF2320802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde2ab67938cdc134381a621dcdc3e7729afba5e5f8456a9aa82b6dd3055ab4e. 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/QZWFG2394233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f9b956590c9ae06b42cde89600c3f496a42e3140790e5845b0e9168170b70e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZES82418613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a17a70e215f56a244e55f6f9c5e3ed25d66b848074d02c0da62fb3d83f1081e. 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/QZHN92462670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf30a21651dc1b346cabcadc98fe000830dfde1a49f40be32accf98683af3ac3. 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/QZNWV2423320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d483249417dab9d1fa80ec56e27a08728bb96015c308b8370f3c3b379bb9c78. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:28:04Z), 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/QZTB22448250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efaa2d203a084d90140d8767a7e0dc07bcd5a40e1f7bb8fd255e24167d733cd. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWFM2461417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19bca4ad8746859e5f06f6245dba1b11de53e1ebe1acb7d2560381b4bfe6bc2. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), 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/QZZ7S2467752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66666511175dabb9116da76614c203d3ca37e0101fe68cd90bcd79d90b2394. 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/QZFYY2587758.