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 0xb2c18a7783c20432761bd279799c59c81e725086b1e510574ddd31cf42802ff3. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0fc6aa48-2d00-421d-bcb7-42b7f1eaa692.json and https://artists.proofprofile.net/proofs/artist/0fc6aa48-2d00-421d-bcb7-42b7f1eaa692.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 0xc2942a4adf506b34a7f5459d530e7f887207d30625e4bc0c174a3a7a7204fed9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZTBE2576424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41cb836b9507cd4096843403459a5837b8ca84141288cb7103e3869e155b0e3. 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/QZTBE2576426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca41e71c0d146ceb5f8a91ecbf5003cbd851acce15c6923637a0a9da8ed5b6e3. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:09Z), 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/QZTBE2576428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10b4ea3c304d17d007c24d68a43121d16104841d49d1c38f278dc972e68b0130. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZTBE2576429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a34f279989debf105cf51491298dafcd34f83095104e6d78ad25e5e3f4577d8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBE2576430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf560dd6d97c8f476ce672d62d0261ae0868f0ebaf4d3656ddd4157aae32b2f94. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:32:54Z), 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/QZTBE2576431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3915a34f9a744882c90d7eb91da035d3436eda5cc81596e39681cd6c7eb8cb06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTBE2576432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccad8f427f6543be912787c8e0bb883da3e33cdf901f07a752320637bcf6eb0a. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:22:35Z), 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/QZTBE2576433.