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 0x7fe060b46cbf86ed574e14837f35542a193ec64ae4a84a975523c937fdcb671f. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5aa5f858-7800-4bdc-a89a-00bc57dd96ad.json and https://artists.proofprofile.net/proofs/artist/5aa5f858-7800-4bdc-a89a-00bc57dd96ad.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 0x71bb46a009deac149acfbaaa4d6d8c0e46b181e4c22fbd1942b96d9d46234dc8. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZS7J2465171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1907c906f8b85da3bad623a65df5165805ab894191181908252fe0ee89323a01. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T22:19:25Z), 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/QZS7J2469130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac9f29cd06a9a8879c3d25133ac4d130bb8c6165aa8e999facb8d6b6d9d7bb8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZS7J2458746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c1f7866fe671f4255ba73cb3893ce2f2489d30a062229d5b9845fbd2c87ce4. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZS7J2488353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca5bb458a5a3b6a534ff4e2f7135d4a0a920f4769473d8519e69eb1cf054adc0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZS7J2429044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccfea0673851adf4934359939ff89a960cae18092e0a833a13b573d5f54cb3a5. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZS7J2456490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda80b1b0169b64313765d332f25743a092affe57ebdc895d443b3276513af770. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZS7J2495097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26ebf6a9c94c4cb3ecb297a0214663ecf28e2d27b2be66c36bb869b8d2eca849. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZS7J2450571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf14827b84d23763dd3cc9cd8e497ce2574631dd84bf6c4d1d92e3fcc620a9d7c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZSYP2515553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d7dde4f8601473998c018f67186ffbfcb1961b17cb4d2505de8189c8910fb91. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZSYP2509768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667af2b32bbc23968df43c17431de369729c765edad4468400a1ff30e15142a7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZSYP2535839.