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 0xc2227a26a064ed676e4b8862014702c39d3ccc107ebfc40e7ca676bbda0450e7. 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/7dd4147d-d386-43c3-9057-be04b58f3101.json and https://artists.proofprofile.net/proofs/artist/7dd4147d-d386-43c3-9057-be04b58f3101.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
F Is for Fire That Burns Down the Whole Town!
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 0xf3f190c87125a13f3b82cc7dfacb44e7375a517e2fe650bf5f31a08f695dd8fa. 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/QZHN61973945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x616003032ceaf672ad90779eddd126dcdf75ce203f4067e991fa2a52d3dfa439. 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/QZFYX2144540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d09918f55e9bf384df27578a5b433ecc25ec40beb75101d5da24118363358f6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZFZ22101680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5c2580306db690b413ea1d6d0a70fd08caec995482bc5957e05e20803edb12. 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/QZFZ22188002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46980821b0af3c1bcfe423a084471b473980c832dcd325176c036013b7cff3de. 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/QZFZ52115737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1a84d568038304706cc64279dbfbf2c00ab1b1c3540f20a2051b37cd29b417. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/QZFZ52197486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x598511fc3a2c2ad7980c659598d5b16bd8c803ce43059800b6f4dc147f01a335. 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/QZFZ72159273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96651d2c6c32c7f14412dc2ebb199e34ec9af587690d523a9690c1d50849296b. 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/QZDA62142895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77685e842820825e024319ff5f1c2d14fce44127550105942f9b4eef81c16345. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHN92154158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57da98b4c4356fab67d29108fd69536861d1aa5444cc12723aef8b82360a0f83. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZHNA2188497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe40827d7cf09bca727d9216c785333f5bab596b088185895b7ad7b150e70e1f4. 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/QZHNC2128959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf3dafdb66476f5d158533ef18d28099dc56060efd446d359b9502f8a2445e64. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZNWW2176588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed90dab2bc27b0b6d65c0265d4b0d6c25000b2bc88c0b85de2b54b8e4e3a389b. 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/QZFZ32284732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73699b2feb4024a3cd3ca556916d21c1ca00f7b251f3d29aa85e46cab5ff3fc2. 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/QZDA42238928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d2e488bd21038ef3692bf8180b51debad16a2d5cb8820cb109c0dbc3bffbc2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T16:17:58Z), 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/QZTB42287915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a819e9ccef4e374508233da1c408874c0a5907a11bc411f145e1323c0d7e2c1. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZZ7R2418003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f2406780d90525bb851c4099b8c34385f2ce440eb37147bd1c7e4833fa33b9. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QT3F32427654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0863e01657947103453892f519ec2f2669892cfb98b5d84f241a6635282f771b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZHNC2581597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce21f9165235b64394f57e1407764f1499270934844f8c32bd16b05fa3a7a5c. 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/QZHNC2581598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9444f1c977376de5a75983eee77f590a1a26f73683971e3250f0574f0c262be. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/QZHNC2581599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bfa068c160ef1ef3f88d52808693ebcfbc41dd9a52284ac2879b313d5daad61. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZHN72477790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd45baecbc05feb62707fb214a725533e265378a055babc369db7036547ddd380. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZK6K2554571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9302062567e855af688281ca02dad8d5ec70c2963f1556deeedb65ad4a1d8cce. 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/QZK6H2593201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa29f5cd3af5862c43ca8c52a4b4709f93a8b4a07f46840d2ab1c8316debe2491. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZMEN2561537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47f9413a1028a5fa7bcf4ce258b68a5a2aa0027d5c2a299fd8cec66334eeea6. 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/QZNWU2505507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7279874ca683cefb3382ae93c8a67d5c620fc31cb04cabb79c614d0478175d42. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZNWV2535694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eaf689d8d0988b0f9590e53d68c7bef9400929585811583f0f50d91174e5b7d. 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/QZNWX2516830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24524fe6690d78d67ea351b2806db7761269c639e9393b3b20a8163b4a5829. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/QZTAS2576974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f24524fe6690d78d67ea351b2806db7761269c639e9393b3b20a8163b4a5829. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/QZTAS2576974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac851be5f5ba9b516b82111ed080f069a2d639c6acba8e3e05e04ddef3bf54c. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTB22595018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf17c0d425f91a36983fffb49a61d2c7e0f00fda6648ce1854c4c77055788f3eb. 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/QZNWY2230459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c0387b305d22932579f2b858de837b95d39970a5134b06386e3d4586c073c3. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZWFM2448849.