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 0xc851af2e19306d62cd0daf991e63bd72d0c7f5537a04ee4b0b8e0b23719321ff. 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/8062c7eb-3613-4553-9258-8fcdac4ca1c2.json and https://artists.proofprofile.net/proofs/artist/8062c7eb-3613-4553-9258-8fcdac4ca1c2.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 0x10fc61c013ccd25c104028d1f2a1dd6896e9350338b6dcbcd54337994c88ca77. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/TCAHQ2353603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71964388e9f6c65071da5de2769955eecc495b3f54c8e6e34d0126952f9258c3. 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/TCAHQ2353615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061afe2018a7e0f10162422f95139d0326fc6b2219ee8a47d578b0b5125d6667. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHS2347425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x363080b641d889e86ccf610ae35d644195f9c6242637f9bb2f9a03eb7b82c70e. 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/TCAIQ2441396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4714954f88a4fdd14aefcea6c41038cb01b0e928a86f2b845d4c6ca88edf1e41. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCAIX2416443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf42d16367359a13ac24488606690c5f213f28c54eccc1d2a78e64843b4f0d4. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCAIZ2448227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6bbc23398380f4ef3cf49f2ade94204709e82c9f2cd98c065f857cef4946ce. 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/TCAJA2448262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f5821efd3a02597c0992debd6539267af983e889a4b300941722ac92e3c33ac. 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/TCAJA2458467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5473379e834ebf895a7327e5bf33f1d0748f687c2e4624a384a5c6a59e93f6f8. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/TCAJA2448310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64e7f6674fca48e6eb0c0ea134342c6e5fe0f3937b5b2be6f08855f9638638c6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/TCAJB2458482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56dd8aa16e0c6850904b1b491d709d2495b808351d8ec78b48a2d3c5345970bb. 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/TCAJA2448338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd80b004355539e61bf8839d8a46d223a211f657bad681befb2ff664eecbfdf1d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJE2517186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711c72b84cdb909b81f922b932824cb3d75f463d34ad2c19e2fe449d788a3c16. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/TCAJB2458404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dd0b9c350ef0c6f65b35a40e2544ecf7c1aac73b9e6a34b2ddf8c53ce36687. 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/TCAJE2517244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb721a6ffd154d99954951334265306050b8b0795f0088b69b3ad458606c9e26e. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/TCAJE2548539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609e95eb208f740d13d6f9141fbbad48e1dab22dca675a6bf383e6d02dc20770. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAJF2526679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e8518d6e12713ac5630bcfb4aeb0d2af47953e4ee2cce029797de4ef4cad03e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAJH2573454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08257f15dce6c5e808a88c2d3a486472186923ba4943ba8bc27ccd196e7a941a. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/TCAJL2577824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0deef34af180d9d4f9aa1e4b640c1731cf7c59312f2047ec07496b76d2dd1024. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/TCAJP2543021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc50e5c60353a2277079583831bf75fd27c6e15df5790d5c097cfbc570f6955c6. 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/TCAJX2570215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c84738836f3b738c4fb99e7f49b476f09c19ce780591eb27794b63f680de299. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/TCAJX2570224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa8f2df93c1686f2898bd203bef2cc338a2de691af519094b9b206214622756. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/TCAJX2570349.