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 0x71d36d669e3b67ab179bc68dd464cce89852abd4dc3f47b33f0ce4920dd143e0. 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/712c7c0d-25e5-4a4c-9097-c94e7bff67ad.json and https://artists.proofprofile.net/proofs/artist/712c7c0d-25e5-4a4c-9097-c94e7bff67ad.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 0xbbdf3804c7cf8e3a859f1ffd539cb09958ed99d132627ddcf5d0de6f714767b1. 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/DGA052379300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9218ef22288fce453803c075012721a89cd33be70115f769119284ffe3652f0. 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/DGA052377690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9a7b768082075ed5234485bfdc00019800091e06bac3315eb2da862bef441f3. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DGA052379693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe305ab0e06b1f043878ccd9b9865faaf3b9a7383e99f1c841b0133e617883a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:57:55Z), 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/DGA052377692.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2d7f7eb517db951afe0ad8d9003fff2ba0d1ca490e7e95cf7a2024566ccb0d. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRX872472075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe629a3f2c69d107b2b41c2c447302b5cd4b409797c64b84e530ad229261e1b69. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/DGA0L2411492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x065136d9f2dc738ea2aeb01537069fb7a95e1ca3a47e60ab7b733f71f800aa5b. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:24:41Z), 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/DGA0L2464825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3ca4783d96d59db5459eb6878657c081c4d1af71ec38600649a8e302d5af13. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/DGA0T2416619.