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 0x7a394da75942ececfa92802aa31b65e987a11641017875bac45f54050067d767. Chain 2 (Bitcoin): anchored in block 953588 (2026-06-14T04:52:46Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0006a661-1957-490c-9e8c-a3f7d276b95c.json and https://artists.proofprofile.net/proofs/artist/0006a661-1957-490c-9e8c-a3f7d276b95c.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 0x36890037ce562a543d1ce9d0e107a4b767e7a0127a2022f3cb0b110205c1c844. 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/ATR981192583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58e57e18952096c8e20fb2e10b66d8b472bfc975aed3cdb1d490453a023c654. 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/ATR981192585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c7cf4be9e6c42edb334aa88d5ee943166a3bc9d8a5911b55a2dcf4fda4ea2b. 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/ATR981192586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab3467bc24bfa367c37891226f0521ef1afa083acc103fdbc488709138483d9. 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/ATR981192589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686c3fc54ff94f750bc35ea183b09a94397ca4ba7922c61038aae758d67a76ae. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ATR981192983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0763d50347a02452959eace880b08ba5c17b7c7283f2df339709fe5eb1367a. 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/ATR981192984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae6744ed9438c77a61ce274a3985013d1ecabd3934d404b334fe67ba0dddcd. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/ATR981192985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1440c5d0aadd79bcbfac5499a1bec72d33c353bf69f478f4ec7f1a4c8bcd7b2. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ATR981192986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa117a56d3450707c059a865a0e727a3357b20fd94123e4f5e7448cb047c7ac4b. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/ATR981192987.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48af3a6915f50e7d39623eae85f08269411b0604ef842ee26a7b4208687becc9. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/ATR981192988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb91dc178c0cb30b42d592a9ae4787e269fab480c09944b6a489e5c2dcd44eb88. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/ATR981192989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cea4046ee0094a7bb345991d115c029b9cbe97d1580ca545744702e6a804cf3. 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/ATR981192990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8be50af46da2fa87b5b969c80406253486806d0b0606791f05738badce9d6619. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/ATR981192991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b89c30377a29266dd16f640a385e90dcf6157b8f62d795a7cdd440941c1992. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/ATR981192992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8b2ffd528d67e0aa23b474bc8b6baeacb0a232825d88f350770b9731b1cefec. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/ATR981192993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2691036e9659849d10d01b14ea0c3636e4ead46e6dd19bc40fb53d9c374e613. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/ATR981192994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c51b794fc4da4981f9924254ce3baf921b5869692c4e9d9de50927a5be7a84. 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/ATR981192995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2fbb5cef7fff25e64cebddc0a6953e39898247906f44c01dc1d9b665caa8cda. 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/ATR981192996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad491b80cf401b0506a868016d78a477f86b7ff11d09c15c8c105f7f8e954b9. 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/ATR981192997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07371e4664d9409b2a3183d0865e22337f119100fdd742ed1b187a8811a16556. 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/ATR981192998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03016dd30a1c4d7f03f27a6695b9b0c63a2909f24d55bacc9ca31c3f3079664c. 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/ATR981192999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2f8d46cbc2ac748c775d096417089a3e9ce99db0ac04d6bd66615af1e10cf5d. 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/ATR981193000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd035185c32c20932fd789a92b52a0cb7cf53deafeb7b05b1f472996370d19614. 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/GBLPF6784340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e10a48a770ac5cf6bf391b01f100d8331900da0aa67c151a920e157387ba31. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLPF6784341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf2191dd0af4549de00beb3f34064f85e482621b1b84e2dc1ed886fcf0b64cc. 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/GBLPF6784344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8482f5e74bd3fa47331b26c6b806be4e68abe72f79756c3a188d7ab27843ca. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T13:22:35Z), 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/GBLPF6784345.