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 0xcb944255d25059ee508e7eb2d123d306b9892eff41c1b66748f2de5378422992. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/83f9482d-ecf3-4d90-8127-8e153936d341.json and https://artists.proofprofile.net/proofs/artist/83f9482d-ecf3-4d90-8127-8e153936d341.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 0x0fe6063daf8c220c8fa5af3054dc5b798fcec80e242c6e1c2174ddbfc2aec143. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/CH6540872754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe23e6068079f95ff504290e67791fad404f862d7710c88ced0e9d8101bcc0f12. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:52Z), 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/CH6540872755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3c759181565dec93f5da5510219968facc0ce0dd6d746b7c56563af31fee87. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CH6540872756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfba9a9032803f8a61f64e7e47f469e6bdfb2f764d8afc9ea306d0547b7853dda. 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/CH6540872757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44828a671d2eeadf86cf01b773548fc02ec8a0ecf56f79d7fc8611f830bcbb6b. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:19:40Z), 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/CH6540872762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb2cede676df27cf874065ed33ca454a1d95725bddb6f780fe828d51e327ca6. 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/KRB921730457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70396d869056aab8d7ead8bc527f0f1af2fd8bd6b2cb93f16dcbf35bcbc99233. 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/KRB921730458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40987f11278df5b675f0fa105cb5b7996f99a6743d4451daf9f27c230a69426e. 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/KRB921730460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa50cdacc5b8ee1e93335a69a41bb683c52bbe7c77720abd00659f6d2ce69d888. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T11:47:29Z), 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/KRB921730461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63821b73f4bb8ac6822b4cf954482bb2d620f813bce7b61e9bb966ba4a099905. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/KRB921730463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeace82c50e0fcefa0df7bf455e16191609aee0da0bcd6b86ae8eca8efd0d4c6. 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/KRB921730464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa463c46b1ebb71e4a78605f539e477de318490b030673b30b91a8fbf36c804. 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/KRB921730465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2fbd97b0589f035e223ae60c2ad4e6f674bf86dd3ec416055d8d9f1efaa8319. 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/KRB921730467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d33f7715853f250b7325a9621fd81316689230b18c0009bd2aa1e9ca9b47540. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T11:00:52Z), 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/KRB921908001.
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