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 0xc4bb85f057ff41a05e952be0132af39331c5baa45437c525b81ea44107bba9d3. 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/81551c24-3505-4557-ba87-7d0939721fbe.json and https://artists.proofprofile.net/proofs/artist/81551c24-3505-4557-ba87-7d0939721fbe.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 0xd7be369db608ac98ba0573f2f2bc69885294cbf11d663bdde86d29e9495c00e2. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/IDAA21600358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc211dc3c188a9acafbd714c5c2406c63c42a8ad8bd2ecf0e04ccf00e4f579994. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/IDAA21500328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x162928a7e04efb98a6a187460af8cad6df34af1b5afa75fa2294deb790e2ab33. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/IDAA21501601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00e7a20ba293029099a72a7414983e9e8a59827a2866fce1ea85612c7aef427a. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDAA21501602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x567a5fb053ce8fc8b343f2b7841d2956bcdca08b5f36681ea4c4dfb2bb5cea4c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IDAA21500331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc182155c34e62b044450dd897d1e460d21441cf9022b2bbc54ec7160480ff61e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/IDAA21500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee1e44e704c6fc9a9175e8120e517a04eb19dcb3e0819cf64c44c443bdc76a8b. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/IDAA21700581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a744504f8ecccdb408d0b356660b92013880f67887f8a6c328d89b2bf7ee929. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/IDAA21500860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa63bbf1d673e33f56731bb214239ee25fcb843ce691a76fbcc61e5e6cf36cf7f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/IDAA21500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f4f4e92a79333a63478e81c91c77f6275164fd3a275e36515a8dbc9e3513a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/IDAA21501604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c00c212996cbe0b492fa66969b46aba37758c1ca369e0263bcd313504bc953d. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDAA21700574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5bfcd2fde238a34fb8807f93887a7fd76cb3a19c519c965c79cda5e429a9c18. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/IDAA21600357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1743c1ed60d4e2eb61e049fd8b50d56f9dda4dfcfc20164d13ad3ed3c8cf28f2. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/IDAA21800346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcc3d23778f6756d11ee42c101ab8e540d9a612b792e1fdbf04fa71d2dfeb17e. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/IDAA21700018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4913264ff0a664665a8225631df0808c3db087f24f757dd20d8e2a2da085960. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T19:27:18Z), 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/IDAA21700022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a258a3cb86891646ea265c75920576c12990092aaced81f10613fa0b728b63. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/IDAA21700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7bd5a680915602f1cbdf728a564b0d5973a78b1061af7145d6ff00939128d13. 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/IDAB30609426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12aabc3007cc97c6a5598dca6bdfb458213eadcb6dfae3492689180b34d541f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IDAA21500323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc2357635bfad20f9b2e7ad7759a46aacb956ae5751df18e264cf970f19ec57a. 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/IDAA21500326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9865de13cac5a6f31d1246e6ac09ff145132be61f1a8896f0e207919ee056ec9. 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/IDAA21500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99e0bd514ec5b826d210eb5ca34ebc5f965f06790972137c336c872617ea8cb. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/IDAA21500859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1396ad7f1de5fa873e053ef66ac33a583e0f07a14a597ad034b8c07ab91a5c85. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/IDAA21500862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13675152d19c6b33e312c62c19c77b723b23af71011cf9343ee0ffb951edd95b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/IDAA21500863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x095cd29680d3fb7f1b9fab86c3ccc3f60bfbebe73698383a98a8824f0cfea69b. Chain 2 (Bitcoin): anchored in block 957692 (2026-07-12T10:37:51Z), 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/IDAA21500855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7879a4aa526cc017e9f33c6da15c75b67e0e7798fadd9bab715688fb9e51b540. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/IDAA21501605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bffe6da0b8fc8be26c0f59021a50f671fd93579ae91f22e0a71b19802f2b77. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/IDAA21600353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d95ca48e6087cb8e4602157661727cbcad9752d57aacccee884102d3f3d4f6. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/IDAA21600355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fcbbe44fecc9bb4963b1907e452d4d79ef8baa086c364def02e46b7d439799. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/IDAA21600356.