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 0x79a6a87ac7167a9f8e10e9b37e7d895632ac40f32699aa41df198aa806a9764c. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/424ec317-d665-49fe-9942-21efda748896.json and https://artists.proofprofile.net/proofs/artist/424ec317-d665-49fe-9942-21efda748896.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 0x820d6c42ecc4f8ab1e3378b8e1bf81dbeedebec1002f2cdf89c8be01f4baaa75. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZNWZ2450208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913dc44f33edaaf1f681b2218d494b371c8d922ae8226922e7e20d5570b4a0c. 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/QZNWZ2446630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf40de85cecc423e3252a0af10752252e52cb59860d1c8a9caf4dd7612d36fc6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZNWX2496750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c6c0f9e6a343bbf849494c5cde917621b24fce861641b8ed3446d2c5b5554a. 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/QZNWZ2450209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b41eace399a1bc5206273402e4dd2110f1c7a2d6542e5314f22a3c754c2f61. 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/QZNWZ2445954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c268b9ac857f6fb2e98e2f54091e073aed31c2627f6c6fd906996222f8a5a5f. Chain 2 (Bitcoin): anchored in block 960177 (2026-07-30T00:21:01Z), 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/QZNWZ2450210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eddde84c6e8a21c26add9d4582106e24c247f6d6b81f709e548cd25209ecce9. 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/QZNWZ2450211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54628549ca4f9e5241dc3b7ce3660218680ff5bee3a54afb0e49029560f257b4. 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/QZNWZ2450212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e8e1834a8466db343732cfbeaef502f0d52a6b1b6b81fd0fa380571b3ced128. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZNWZ2450213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17173c041278dbbcc19b4d85e41f5031d7664242258952828d8a81fa8f92ca. 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/QZNWZ2450214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a12e55e6fb123fe6708fe770a8a8cafa63f123f1e4885998232b05292784aec. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QZNWZ2450215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf419384df9b8ba4d9a1a924a66e8034387825347b27ba92d48552f034c70b077. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZNWZ2450216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe64c77b9c2ebae354adb58c070ffe14a7f501aeeb28439bced807e195b6b13e1. 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/QZNWZ2450217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8ad133f77dd54e8d50a171a259ff1813a17018f0d0b297a99850e999410ee6e. 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/QZK6F2336859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e01dbe177edb7f8d1cf13b814b70ccc11764b9403904210d518bd7a0f741c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QZK6F2336860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfcc57a13d420d4f199fc5ad42d2fb3aec279e4a206c11b5256c015e2637d4f. 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/QZK6F2336861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x193dcb83f8e87909612221a978de11ff5a85008561414be6bd45952f0cbc6867. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6F2336862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732ccdb39a6059913b420f65105d08fd00a84df3e4b2bd168292cd8da574c08a. Chain 2 (Bitcoin): anchored in block 960303 (2026-07-30T20:11:13Z), 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/QZK6F2336863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0cf11aa1fd13438ee161cde647c3f96dcdd6933495fed608d578133315c8bb7. 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/QZK6F2336864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91c60d57028e3a46d39923589f5162fe52366f5b903655fbfc0d35d6867f5ccd. 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/QZK6F2336865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe6d523254c5708eb82495b238de4c52c37be7a7b637ac2d988872378dff6e36. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZK6F2336866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6547c2591e9afcd58a500423367cd2f50ae216a33ca2822851607f6424784147. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/QZK6F2336867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0894723b347ff3106267e1e93318e786c72139cd8e72bc1fc8eae66c6e225c58. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZK6F2336868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8229d10acac706cfbf59017d6300e95070453d456d502c818a9235b2c889d3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZK6F2336869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4913dc44f33edaaf1f681b2218d494b371c8d922ae8226922e7e20d5570b4a0c. 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/QZNWZ2446630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22b41eace399a1bc5206273402e4dd2110f1c7a2d6542e5314f22a3c754c2f61. 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/QZNWZ2445954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf40de85cecc423e3252a0af10752252e52cb59860d1c8a9caf4dd7612d36fc6. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWX2496750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e07b57125a34cdd60ff2fe10afd3a9ca8b5ff09e9fc8c3d1da6147c12b4b6ce. 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/QZK6G2334675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadf2e327305193c8d9317bb44d118a0138885d5ef89e87673ed8cda30f8b717. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZK6G2391758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49d7693f81e61f452ef52b302d9cd29bfe7fa587e80ebe0c2410aef00c23fd40. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZK6G2304525.