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 0xb56862c5393c30880de50f4e1b8675438610a66916d63bdece13575ae659c945. 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/e82b7d3a-4522-482e-a5e8-64d71b937846.json and https://artists.proofprofile.net/proofs/artist/e82b7d3a-4522-482e-a5e8-64d71b937846.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 0xe79a36d71b1b5b2be6e9eea75365ffb2dcf143857b4e75369c82630055b817a5. 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/QZFYZ2209268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd78484cd05a3c4fa3ebc4513bc5a184f13b7cf3429862c9efb281162686675c. 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/QZFYY2288023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x352ad010b1cbb16a19f1ca1d28021c9c79d033edf8ba8c22d61ceec5a07fb1a4. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZK6F2292504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c875000153cd0fbe7ccd3e91cfc259e36ab17e6282f2fc301c7063edbe7a8a. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZFZ62383193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f261a651e5be45f3e20c88ecd354d2d460b2563d39e7eeb6b3d2f37c7d8f00f. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T13:27:11Z), 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/QZK6F2351074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a1aa494946c96ba20639d25873ed836fd0bab275989ea3fcc129d2380f0fc2. Chain 2 (Bitcoin): anchored in block 957561 (2026-07-11T11:41:29Z), 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/QZK6F2351077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf707dab7e6acba2ff42650eefcd41f6973650aa58c3f81a2d568813a5958266. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZPLS2312874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622626241383d3075d4ac42bfd45f6ae43943be31cc07f940bc223dddc15c58f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZPLS2312875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb54baeeb116655d7a18d599f3d6ad6f4bb325173426eecbe490dcab50be5991. 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/QZPLS2312876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc33a2092184587a0ba82c7bf2c060a5a47cdcf847946cc6f01ffeeb02678753d. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZPLS2312877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09fdccf4d7359b002310df202937eead785248dea3fcae4f08b00ff8541331fe. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/QZPLS2312878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5429ae399205f048e989a8ed7f75dfc6e91880458da97aa3aa0696af9db0e4bd. 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/QZPLS2312879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac960bb26109bf0ca7f876cdbf2bc329c8633811426372073b5eb3add482069. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZPLS2312882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7439772d62599f901c3ef9f07a439ca7348d4dece3cf1e13a1b336f32da6ea. 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/QZWFE2375492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4afaae29c855db0fa69f943b6ca8e6f424bfcac35162bbb79008c916e5d46a28. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), 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/QZK6M2434260.
Outta State (feat. Baby Auto & imsomarcus)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91bd67bed67c471a8d214e6655ca0a2f2ab5369304db784c69ea6e12588589b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USLD91771507.