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 0x4615a46cb6ba3d19162fb8fadb1c437873731d2155c580785627f856a086ae56. 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/71ce4dfd-040b-4d5f-875a-e36ac07a9a25.json and https://artists.proofprofile.net/proofs/artist/71ce4dfd-040b-4d5f-875a-e36ac07a9a25.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 0xcc569dbc5ffa1cf704cbec9f27b8552be446452419df68b7ae4f7fae375303fb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:09:26Z), 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/QZWFQ2331986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfee5f3936d3d60dc67421382234c57058bc71fc62fa6d2483d8df71c482283b3. 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/QZDA62406173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1627e42f549b12cb1ffb8c44167884ac364178dfe79bd4fb82971d6fc8b22e. 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/QZMEN2478112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cbdaa8e36a483f6a3b5637ceda6598525215b0c51ea0a1a4c2fc1443b795746. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZPLR2404121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4af0780fbf2b2f263aee2fe919d46c7cf424aa980ece3ce646c20720f40f07a3. 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/QZTAW2437240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cc4e0d745dfdf5fd2d1ebd159988e60d27b078ba7549357f1b844c2ffac34ab. 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/QZTB22483857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2082a5e9aed40911f8815d1ab97ad55d58f203573dd8a9b9ff66f81a59d7447. 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/QZTB92472995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459ffd09adac067a270c05afaba6c4a5ad37d45ec3378d3129d94aa901bfb126. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:04:18Z), 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/QZWFP2405681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c96b7db8772af00ad3787966e6a3d5c8b76db5a195aaa6578464a17478c3fc6. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZWFU2494443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f81e13d983d4d44d1df7f44879502923439b888fe56dd3bec4a3cdc06d1427f. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZZ782438402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a259a0a53fbb50cbaf6ef073a69b4a647a0ef868d9a7de95b4aff5799919ce. 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/QZZ7P2420683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x918b63b50b68149a2a068373171f39effcc2d83e3de7c081572e94f89f2bd895. 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/QT3EY2445249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d7ed066060c45a6d70efcbaf6ab7e8f84d7bf9ab0d5600f27349ead89398f94. 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/QZFYY2508070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ab6eba7879874c81ae20972cf192e7bf5250a49753417fc2a602549fed4a66. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T23:41:40Z), 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/QZFZ32564569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea0552beec72cdead7313216acfac4317823c3fd36cda24a45b21e10489ca81. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-17T00:12:18Z), 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/QZES72542031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe719f01ba5c31cc6297e10af6e26a4a28c66728716464aad2bf9769cc362f869. 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/QZNWR2565223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68ad8270c32640e88230374dd9c0a90be514c22e4651159b3de4b79f6fe72b53. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T22:04:53Z), 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/QZTB62528859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f3b479f86ab66a29da0d50ed1693b9a582b07d5bc3b38259813824a1d17dc32. 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/QZWFN2453872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8dcc5ec3cd2b13525de9ab8a73fba7df41b35ff09f7e73de04e3f83a057b538. 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/QZTBB2421726.