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 0x0776e9a2e6652334d8a00805c9598cc5cad7b52756859e677abefb5da91d3a57. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d836129b-ede9-4d62-9ebf-e13c09d5d03a.json and https://artists.proofprofile.net/proofs/artist/d836129b-ede9-4d62-9ebf-e13c09d5d03a.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 0x0e6b301c0fd6f1da58b4edc783c8c37d57a083477a0745f994e6466ca8bf9780. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USVIC1572201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e98c481859f2f85242057ab5b87da7c0a5215dfdda88ddf0ad2221c900df34. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USVIC1572202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5adfb447e091fbe7b15d58e02bf393ca060e9aac63fc8c19dd4ad9638f4266ab. 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/USVIC1572203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8573bda24c7994e3d905d132c1c7ae46cdf51e06b2420288af1ba5edbfbcca0a. 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/USVIC1572204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36457b724903f023d71bfed6d4ca2e6e6cfaa43128ea33f1dcb0fad95b60a98c. 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/USVIC1572205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d75600a8720b400b2ef0d85ef86b9e1d660970bf01c19fb4eecf32d7c5c889. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/USVIC1572206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb56dafa359eafaf3d568876d91c57283714313b7ad30a93849da5dd1d5a3d54. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USVIC1572207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9dffdad3299dee177031f26681460ee2a0c647c4f4bb2b8449576b56eef166a. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USVIC1572208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6992f67da431cfb169023b28845863d4cbda343f938df92b000fa381908df52. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USVIC1572209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd66c526fc7be7d0ec240ed3e1c843d6559f1c9a0bcc43ef1de0d219c0e03452. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USVIC1572210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf593ee4dd162d41baa7256676acd330ce694f9dd9295f3770ce5818911e251d. 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/USVIC1572211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3d81034bb2d96ccce82c6f53426d7752a6bf175fb2879596a02995a08c508e8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/USVIC1367701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddff0910628f08a03ff78f18bc950d7ca5476f71481dfd56744302aaacf40a9. 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/USVIC1367702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5288d3f2251273eefaf390befbd2bc0af24e6c3e067ec3e80ff6435a3f3338e2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/USVIC1367703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3a3d6e26db99efde73eab0bc6fa31aa3394c0a152b2854f1e4cec5fe876a46. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USVIC1367704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd86b5fba06a54105746c3e00ebc8d2f079687370e15e6c40534634dc64bbcac1. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/USVIC1367705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18a0d1db77e73b68202380764741ecadd054ff361ea9217a6044806bc5639a54. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USVIC1367706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fa28f4227be2ba6514dea574a29a887a3cb2acf04024a1be687f287af244055. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USVIC1367707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094ae6831b53b71faebcd4dc66573bad3ade014a6342c94f9486abae93fc3f7d. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/USVIC1367708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa525d39b4049d8c5dbaed5579e825ffbe786923e678d924689e0c46c2e31dc5c. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/USVIC1367709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116ef91af3e437248b0f7ad87ccfdf40f9b9c2386ff61da51c74aa41a5da1faf. 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/USVIC1367710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73f6597623b9b5c14a76dbbaa46199b54a3c29edba79de8c9572a85b0ae87634. 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/USVIC1367711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4679b6632203dac3574966f9d6488b2027a035ddf56ddf06d0940b2d4bd73c37. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USVIC1367712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1dc48916eb0da6406e4ea6a95a982d44e350ec99876d60eaa01799104d8962. 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/QZTB32369582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed943571f81157783481d6a57563da1058fa2b3cdd6532e77f9ae31b1fc56109. 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/QZTB32328260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c26b30938333d9658c2ee3f094874428a488556a50ddbb86dee356498e085e. 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/QZMEP2344818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6548b8fc26db1c2ca6611dd018e0cc05f10375a4da3be8f23adb78217c164034. 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/QZTB32369583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed943571f81157783481d6a57563da1058fa2b3cdd6532e77f9ae31b1fc56109. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QZTB32328260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51353269e299899f40208e3022073b5e8fb91c362d53615e1b5909f33913abce. 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/QZES82239634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67368f26254bde3cb05013e114b7c503c7f1ee477ee88d3a96cc7c68b4cf0665. 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/QZFZ32255783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e8a2b1b0e075d065f269f2f758c9695bf0c1411682233773569d7e7b0cd49e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADI1765795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30a4f89a66d006cc42b9fbfd8d0caf35e8eb9909abb2132d4da737e9180c460b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/TCAAY1135728.