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 0xcb7211f5999a9b8daa9751e28ce6c33d3ce4d73c63f6a3425187fee0496b1601. 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/b9229204-c453-46a0-a917-7bfcc6bdefd0.json and https://artists.proofprofile.net/proofs/artist/b9229204-c453-46a0-a917-7bfcc6bdefd0.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 0xe948b0b43a80ab97d7051fceb7c69c94f68b1a6ffe318de823bfe70954a069d0. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/TCAFO2117874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b70547304f8638b98fda500098d9dc1b54e5745e9d91503b1d1e694b0c8370b. 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/QZMEN2165749.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aaa508cc2648456682bd8b81e282952a5495a4b0f70950d597e67f6483dac55. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/QZMEN2165750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87ce5a9e370eb6bd20047fe72b2f2e1cd38e0b7cb9e62b8c8c3ba2cbe947a793. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T06:47:53Z), 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/QZNWV2138251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd14a2203341dce5879ff77e882083dac549893d0d6e0b5eea2b4b44c7f015d. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T07:57:47Z), 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/QZNWV2138256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a4884795ecb82c77d3af5cd38524e151b49a4a1c173aaa86203658c623251e. 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/QZK6G2294058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7944873897e728058a672bf764a3ce050ff2f8ec37242d89e38cd69a6fe41876. 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/QZK6G2294061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c47e02481a4d2c4a1400b2155590400ffe7e47a4415976aa718d5e9d6c9c80. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZMEP2231435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4be089e569e0888b7af1ac913a00354b71a1b6df6b1428efab8b1a257607e48. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZTAU2204285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac9f92363285804a1667f0a553a261624a39727d05d8fa79c2485ab03112161. 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/QZTAU2204286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c45e37f2308a666dfce53f016ab8cda6ccb2eb4e91eb997ebcf9e8df192f04. 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/QZTAU2204289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb4808b8b5eff7962221649135f1f863458471e9ff47b532a5ebe0e491ed64c. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZTAU2204290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc244ee7c0d709c88d2e6a907ab51c870739c6a46ee0ecc98fa5fffb5bbc39b7d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZTAU2204291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e6c7a4ab6e8595bc9d4ff4b239731cb15291b9f7e083320e62150835b4a49c. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QT3F42439650.