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 0xa7d1656f656fb4b23df87135628e7f4f0c30f209d8d9ba54b17cdf27188c0400. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed62c7dd-aa82-4097-b013-5cffa7c40e4c.json and https://artists.proofprofile.net/proofs/artist/ed62c7dd-aa82-4097-b013-5cffa7c40e4c.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 0x8428fd7bfc14c9984da397b561746c618eee7e15b6fa38b52d9435626930fd1e. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CA5KR2073033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10068e77f760766354ad913769f60414aff083b4267f89cf6452d5709ad92cc. 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/CA5KR2184146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5998163256eed42bee4dd7c29eb49ee105b9dbe4fda28544e164e4333c359ab0. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/CA5KR2184150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f54ac64cbfca6ededfc71f358ae177698954882de5c4311351149337a484115. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QZDA42260331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e31037567e6d6c6750e676739cba9a8333361d47e76695711509864a556c46. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN52368314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdeac763c984b546be3159c149e1352b0ccb418261ceefff9b07ec22c728f7fe. 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/QZK6N2301968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc386726076a179ff68dda45a5956a1c526939a8d1ffe6d7c9fcfbd5bf63e0755. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T04:59:38Z), 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/QZMER2301375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e29fd9d514b52f1b01168798f3b0371493d02ea3ab47de92c245d17fa6a5bd. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/QZTB62312898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a91a30592782ca2f826a9e0e61966270d1de14c07c951a09ae8ac6bd7377be. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:54:21Z), 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/QZK6Q2464777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6d89dd9a6e603b9fae9284058ab81b9c10d9ba41feee55d40a18ef3f0ffde2. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T05:47:21Z), 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/QZPLR2439306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57df83f66d9e57ae0c586ae98696eb7328b789b7db93811105392d8f831fa910. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T11:19:23Z), 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/QZRP42495843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b336dfdb7ab63d43b78fc59426275ec4b4a72905bb3119931edb06156e31c2. 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/QZRP42495845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f47fb74536e7d627bd08cdf394d57f37609be49f7305a03e433de66bf257c5. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T10:06:43Z), 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/QZRP42495847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec703ea76aacce870ef6b0703139ead0658509410accffd133e08094e2f55a2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/QZRP42495848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a265e3d55fdbcf81570f9ffd0e322bf7a6186ccc631b69a739fde80096ab475. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/QZTGW2401053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7dff74204b43cfae6db8aef2497c1358e3a917b40ac7ce015753043baa14c1. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:26:18Z), 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/TCAJD2412617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06621f914c7aaaab15c46f0cba777811139e07c1e20b51a1328e88ded157cbf5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZWDD2457609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x523f7b5869e33fd81a7dfa6808ae5b3b15ced9905f0a6c53c3a601cfa131c830. 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/QZ5FN2419891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3bfee5448d71131b0e480bf7156f7a5cf9964a76fdb757b11d25d92ee33b0. 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/QZK6Q2296956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745f8bef9a812a89c32c2d91cfb8120790103778cac6172bccb005db5473f6be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USA2P2312603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebe64a3b81172d1b72f0911b160d7db1b147128fa9475425ea759033d9c99a1c. 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/QZWDD2382679.