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 0x8225d49e8d8b642a00938eb472801394583f56d52ced31e4fdcdea2769042811. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4308faa6-727b-4196-884d-9c5980b1b5ea.json and https://artists.proofprofile.net/proofs/artist/4308faa6-727b-4196-884d-9c5980b1b5ea.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 0x4e40704a38e615a757013b2a624212a31385b00b1bf912f8161aca2005c73915. 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/TCACL1622758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07fd4c9fb7581018dfde8f0f9d8f917469cef5838faf4a5365744d2a2f7cdaf5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACQ1616598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x625457e737a4e970a423de691ddc596ddbe53992ed97d77816f5caf07fead594. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T17:58:04Z), 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/GBLFP1708280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d9e8d31ec15c5edc5dcb04ce0f0cb0d0334753b9308b1db54120e454324507. 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/TCAEC1920992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127f9cbce73139f5dea732d0502d39ecc04b2b53dcc26929ac1c9c3d73a0e37b. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:35:04Z), 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/TCAEC1921002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ec624c15bff57b14b1dbf6ca7c1b60bf077e8d9efd92e81aafcbee06c941f4. 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/GBLFP1771575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754543ef9a2a422358dd9ffc6e37750872142c290439d52265b99d31a6139f8e. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAEO1908125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f40931c8c79428098b442efc0173edf05b5c4ca0ddd7183ef21d83879ca1c9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:09:02Z), 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/TCAEL1953905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4607ba060e016943899823cd0ff962fb7b520a0f258deb447da565170831b2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAHL2342024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d33c56bbfba83fbacb4259a094a0c82f200aa447bf0a6f1bc910f03edf819f. Chain 2 (Bitcoin): anchored in block 958329 (2026-07-17T00:16:38Z), 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/TCAIQ2455825.