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 0xa8f7a1e717c93111364ecbfda78f685eed31fd9e4c6d32d43da29511b47812c3. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c5b1272e-9e33-494c-9ff7-2d0f64fb5ba4.json and https://artists.proofprofile.net/proofs/artist/c5b1272e-9e33-494c-9ff7-2d0f64fb5ba4.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 0x0f9c29a1b774206d039c9119db29c72d3e43b3557a9f3fe974dac0f7b316c573. 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/USL4Q1908028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66e2af47181837322a9385d67b4e00b4516a32c1736998a243f28c872db1b12. 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/USL4Q1908029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd3587170c40f24bbfaf62a760aae3f4f30839fa25da71cbd68efe60670081a. 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/USL4Q1908030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0cc94416aab8898ffe30af933437d11c83d85c73e194b5a0c938ba06a59d029. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USL4Q1908031.
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 0x680808385fb783e6dff3fb572c84f556d22c9735e84144f93200ada4defb4473. 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/USL4Q1908032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e7880c73df4a77c11c0d3a104b9d01806e3a8988dc417685521a66abe6bb06b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USL4Q1908033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f84c7668cfcc177c6b762799900ca562be1a12f2fbd219dfe5c93fc268595ea. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USL4Q1908034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2b61e9795a109f7a430bf1e2bc494077a6d8578e6e6bc58abd4926b13cee60f. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM90927632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc5a5ec4cecd5be390e44ff34eab75140b93d95aa561069c85a8de667ad7e8d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USHM90927633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59bc0b8ed54432ab9b8371592c99ce705c368ee56e9fc076181b885d16c7ca8e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM90927635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf72d023676f6432c50e065b9876cca058121d9e94aaae27a1c9090a3a55dd7. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USHM90927628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8f8b5d5bacad94090495f60e5ae49e9cbcad11e9a6b5de581d7ff19ef5e1fb. 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/USHM90927629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c1a0b3a87633a67592d429817332b734c1ba35c3ae4973a87032b6da9cdf999. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/USHM90927630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ca7963b17117ed0c7a8c8a166e970f763fdf12f77dadc6c9d678231e3487b1. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM90927631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26d2166e29541622d2cb96910ade5d0900020b3e11fdca00ff95b8eb84d82915. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/USHM90927634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51f1d968e0138c2d92616beb59a162ea02b8b3e71129cb450209a4c545f6935. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USHM90927637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d8aefd1dcf5128fcbc98127cf66625fb4c89b4e20760e5f72c66c7aa9d65de. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM20629879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970c5f158afbe70246c1900cd0ac73ce498da4cdcef43c660909d53e1d281ee6. 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/USHM20629882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48302c6a252bacc4fb90099cb81ff8d578fcea81ea5f5f114c377410db9a3bc2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USHM20629887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5b8e5c307add88e438bec64f7f15f458f1e9516846d3df8c807697d59b7b83d. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/USHM20629888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0791714de698779e94a2b56e32f7a169d980e86df3be660bd0876c25769e84bc. 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/USHM20629878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa973c0dbb0d997048567ca56a4f59cee28993dce8e17de16dac9020a3caeff. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM20629880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559b21b8deacebf043970abbf2474449e02266c56a0018003808f75b598764e8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM20629881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0188d8cd1831ec4fcc134247161f34e112ad1e455f60e7e16377c31b46a77b9d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USHM20629883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75f42af4d14e69a75da388be3b1341a618ec9696dbd2702f51d6a8367a8d663d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM20629884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb94a29e861f0b8570bd52fb1a55bcb2cffee90598fd561908efe66832ea2a7. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USHM20629885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed38bc27df45662eb625b90555ff11d087127003ce7138dd32a09484f56edcd7. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USHM20629886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56afc2b30843ab00bf2e478d16f3cbf7bbd0cd56198f4578f5355a7686b16e1b. 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/USHM20629889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d6f5095d38a214b18fed65b15df5c05f431022b7c851968a63434cfdede97b. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QMDA62477892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f3055ebbfae391affb1c5331488fa35b25ba89b0704a2da2e878f3394f3b4bc. 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/QMDA62477898.