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 0xabfd2bdb012c4ef89ddf04e37e117231cebf1efa54a578166102cb341e6dc03f. Chain 2 (Bitcoin): anchored in block 953681 (2026-06-14T19:31:23Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/641d9f78-a90a-458f-b1ed-ed1b0e5e247f.json and https://artists.proofprofile.net/proofs/artist/641d9f78-a90a-458f-b1ed-ed1b0e5e247f.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 0xda1bc9c197e912fd25755d5c298fa07b22f25c1464a96c6c27104275f23dcc2d. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T16:34:55Z), 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/CH6542219867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebc02128fd701b42e5145374c7a1e0ae1f2b29e084f24b4b3051f48e6577d41. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CH6540862898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf46589f8018b69407e410e231bd569ac7ebacee8ad9d9ba145fc0df775d20cbb. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T13:06:32Z), 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/CH6540885574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b67a48be58dd88facd14b27e6a4b556e4e00ae6c152047a7cab85d17cbba42. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6540885593.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5607ac48d087515e1239a49a049d2eb7312517ef0df2b615045150d99b5e067. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/CH6541724076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c31a2bdab1d161fc9cab332c37ac6776fd599190f3f3f71c1182abadbd0827d. 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/CH6542301563.