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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f656c5f4e67752a1749257c519234e3e5786a6af908602123f92f14311f15e. Chain 2 (Bitcoin): anchored in block 953759 (2026-06-15T08:04:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b733c50e-45c2-464b-8ebb-77f46891c3b7.json and https://artists.proofprofile.net/proofs/artist/b733c50e-45c2-464b-8ebb-77f46891c3b7.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3228c4d91d6a29780b7bb7375762a8867821c7c673d66b7102bec4028aaa65. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N21829662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6bde5f6e1b92f5d9932319835502d7cc9a8e535c60f1473cbc660fec9810a5. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N21829677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefd046b3c31ede312064ddfabf391baee75fb5cc5d49a25281d8f235ba7c1e42. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM6N21829690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bce760499bbe0bfac69d78f932558c410d4e01d2b24afae678a56b200c71686. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N21829713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a524b8ba605ef79dca3656d17fca77eb7206bc49171444dabeda470f64fe10e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QM6N21829724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa06e07456b6933d3201cebfb7d41606d80e7f96a2aaa065f9b76758e30887dea. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QM6N21829734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0510b8cef10f3a5f63b6ecaef8c65cdb346e8a994d64a099f391061073b81e21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QM6N21830001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e889c84f127eebb93f881f7e852a9577e04856dbe5c1a1eabda442cb7fce5df. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/US7VG2380018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1295babb883f3895fd279e305ce8c1b3c598b5b5ac9b61e13ba71265f6be652. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGH2316123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4cd65144ff95f8156ef2b2cd725628c80f9a86c61a8c09f163c894187a2d6fb. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USCGH2316124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4e104de0eeed6577e51fbe23320b211d5ce3f832f56dbce532c92389f9c3699. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2316125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10ba5f3528dc47cd2519079a9115e1592a462109fdccdfec0e054732bde3b69. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCGH2316126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bce289defe4ffbe491025dba3f02f36765845a2489b285901ff708f70dc7ac. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USL4R2223337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bce289defe4ffbe491025dba3f02f36765845a2489b285901ff708f70dc7ac. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/USL4R2223337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1be52fed305d1b0f2412fd0a53494e0863ddff06e5adefcdb539c599d21ce2ae. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NZPB12203564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f6855eb40d22bc66336e6048f867637956ef0c3f3aabc716a4e3cb3c919609. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/USHM82275558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15bffa668218291ae839a02e250cd79d62f34f97e503baa834b50e21e096070a. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEY472180040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x262d25ea1276736e36c282f6856f137b9e499a181019f27cb9508ae65bba6404. 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/USL4Q2111017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ef529c8e3b9b035550b023002967e667a248469150ed4e859f93e21854ccd7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBKPL2094392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d3376c93b4396058090255465c69d3b4ae801e0e852b06854de9b2a95c899d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKPL2094393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa737a0c4083619f982a753af9f617d5ff326e8413f12c66980af9ad65d98499c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I31966975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4504c1096a3865c40479e6aac5e5477f949d8c60dcb4ebfa41ce7131267402. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/SE5BU1864627.