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 0xd8de5dc9e6693df70a422c6d99714cb6f48205ee19c5530dc9b5004313b7fb6b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/35ec7827-520e-498b-ad80-f2c88ae37ff7.json and https://artists.proofprofile.net/proofs/artist/35ec7827-520e-498b-ad80-f2c88ae37ff7.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 0x477adb4e22dc74db1d59f1a3bee75943fd5770dc54f12ffbc50e3cb94e0f326b. 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/QZZ782511428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe4e89ee68ef0782b6c11ac1a9bde053d9e09567fce285f849a31952ba210b6c. 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/QZZ7W2585849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c643423cc927ac2b48c440661563378e6f36c79210baab719889ebc33cee4e5. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QT3FC2587677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1637a01e933838403c0c518fd3c8dba5037f4d94c6ba36fce285b1c8116524a2. 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/QT3FC2587678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b20d74067721db2ef5db7e8fea42e055b74a49a08fdfb30e3d6494d43cf099. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:07:17Z), 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/QT3FC2587679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb002870d43fe1f053005c585601269b254a69c4e06a2130f47e1b1d76eb10b2f. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QT3FC2587680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4716c1ce964e6299e77aea5e26f61208a9109da2eb87efd2792a84cf906d2119. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QT3FD2578389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a419347537358341b01b7b47e2a2c19264e3d539720f0e8cdaab42ac5da54a. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T13:42:11Z), 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/QT3FD2578390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb15dac6cbe700c3ba5ac83d8e823d0e7b670cd8b557479afb65aab1ed5ef1d57. 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/QT3FD2564004.