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 0x3be297f8a3ee447af453ed66eae893149cab26d846cdaf56799ba13dfe9a57f8. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/26c3ab9d-3b91-4d5c-b47c-420e70bacd00.json and https://artists.proofprofile.net/proofs/artist/26c3ab9d-3b91-4d5c-b47c-420e70bacd00.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 0xf57f8e495b3a1e374c30f298f6b4152c8836025570ab4e938381e622f6a4d1da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42418972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9feb8eeb8d721e6eb4c421890b624b0599ff130ed69f1db4467056138a767f51. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZDA42418973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2f19c7879d470b5f7dea05cec35e6c6b4dffabca46660c018506c3ea05fdf9a. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZDA42418974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacdaadd83f4a44f5921c0c71c8134833abd579904f6a2efde125252ccc86a4a3. 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/NLRD52352671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b14857406674be5a5ee359df3c10aa3d0e0ae2a9ba9f9e43592aa3e794f4244. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/NLRD52352672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d39677b8d5046c8de7f86ec85260c2cb56680d21557dafbf8e0ee041f2f610. 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/NLRD52352673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7213c7c438c045fb66543e4cfce6f2957b1d3e5caa36499bf9a77c79e514fee0. 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/NLRD52352674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ce2384c05f36fc9d42c98b6c5adf3c6f5b24cde796238b75fefb2dc38da7934. 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/NLRD52353086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b964d7f403f130da023a3cc1b99243274d9f5849c22be79eb8db8b7c9e3d00. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNJX2417986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2517ed21150fc420ee69dcdf982318445eedc29574a904f2ee62e42fd788b813. 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/NLRD52352887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bdca4f6e3ebd067d9cc65f90776f2d69408c0ae4f43a2b7cb9d9b2f13f8534. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLRD52352676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0834244b9b9cd48060e13323783fdad7848c72397ca3c68d4e7a06de2f5ab98d. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLRD52340422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8a207f45d7ae95bcd2f0cba0106b3de9d9d21db9c037a44de5f47203e0d7c5e. 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/NLRD52340262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ad83545be592cfc9d252e8198af49969320b1176f27742a6939a9e2806bed16. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USHM92130560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x271e16eb26dfe32f70ab30bb09ba670723efbbc2cbf03479756293d527a8a4cd. 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/QZNWS2073730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12e05cd3576e7dfb48fba8f6a1b64423efe2ab6dccc97ca0c2a4c8e2d237751. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/US7VG2578745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8acebee81a3c4552016b94d2fa6b5eec6c3015a88f91f7e23e59b1febb36034. 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/TCAIW2483969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a90291c12b877c21a9a2ae492ed7fe7ce8e1d3bbaaa3822aee1e6944b731e70. 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/TCAJG2592857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671a61f3f318018e0132e54dfc938eedb2b4155938c8dda57070a2adf5f7bd48. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XW2415946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2606265dcd6ffaabfb146a41602ba66d814a3ca1521a4cc751bcdfa85361a7f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZW9K2488383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43088dc590ea71bb5f9bc90bd32f27f6c1da1e5f0a057aa28ce4b1911c565dd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8RL2452681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6008ad73a039f50bd1be9af83f97d2b57648517786ddf959224080fef90d9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NL8RL2443530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f28be941aff9c89206d5cedfc35f565a7b95853f7211766f85a8cc51999de6. 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/MXD782402426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6770a70cdbf5a66694c582cae267484c31737fbc43978b159a400529be3ba2d6. 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/SE6XW2408218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5c0af5abd94db3a18e73c2077ec92b23cd31fa90338040adda213a7203c82a. 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/SE6XW2408219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e2f0580c25d7bea4b12f99d0e0f2703bf98b38ed0160800d17f51f23735ff97. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE6XW2408220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad37d2de8510b30ce60b257c3d375065a56396e29a155e26d72cfeae55d39b3. 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/SE6QE2467486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fd681f08037303d8d8dfc4163f725440a38780aa3acfba15b8c61e4eec13c7. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE6XW2408221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ab0ae525ced16e584eda5f09c08f87af10d87299ada8dcc991aa7c9523f2505. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE6XW2408222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a640e556c9c0d6340a6ca77597f9027efdb6e33818ba8a9c62b7775854e7744. 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/QT3F22466433.