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 0x35bfef558d20720c08fe989c6c24d234e7d6536cf93492d54bade1cc1b3c2334. Chain 2 (Bitcoin): anchored in block 953667 (2026-06-14T17:49:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/58f17532-0e3e-487b-80b3-ef9a25f34145.json and https://artists.proofprofile.net/proofs/artist/58f17532-0e3e-487b-80b3-ef9a25f34145.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 0x0473bc709354d92c1834e2dd5112188eac5ecff6ade9b7a54cd7344a95518714. 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/QZW9K2371711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2813d5d08619799ee9b475943ffac3feeebc15491539b423a7c4c46ec08794fd. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZTVM2483382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc526a9c9eff2ca265d484b0bdda51cfdb6e1557f53055021944ad8ba4d8a413c. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZW9K2410759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d99f6ea928ef0b9d16acc2da86018617cbe30161a7b74ba08fc3debb9b31155. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZTVM2478238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaf864f3cc9006fbc92df2296f450fb3f7c6e07d968e9a289b1da8db19f430c8. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:11:49Z), 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/QZTVM2334624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9577f3d619f710a7fede1242e9c45238be3bb703fd3e34dab07f2fae9baa4f8. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:28:34Z), 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/QZTVM2340088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7238bd57d12977b85599ed748f75d17d876c9d97f34c28a4e9fccecab80cae8b. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZTVM2311434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19d54b4987c0c21cc4fc59fd90fb40ae585a07980b9cf623b4eb2759beac6b72. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJW2492569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dcea536afc8a4685dd73aa3bc930df314ecba16363f6f9124c73ea449e16df. Chain 2 (Bitcoin): anchored in block 958658 (2026-07-19T04:09:09Z), 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/QZNJW2489024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994c991159aa7aa23583173aa02def07b226f718fdb99363e5e19bec8f8c9f64. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZNJY2447812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e0e30a044b32d346eae3cbaa9d236b85314ec0b4debf7c98b539851dbc8b0d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZW9M2414842.