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 0xb5a8c051097fd5e76e8baa28afb7d5f23109eb455caba86a7ba42ab6edfe31be. 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/0bf5fc32-39f5-4006-acf4-0d5cd6180975.json and https://artists.proofprofile.net/proofs/artist/0bf5fc32-39f5-4006-acf4-0d5cd6180975.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 0x9a113de3d18301151769977a0462748a3ca5a00176abe497a00cb546c6b68ae1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71708226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949972ea49b1a12df0b808a1a98767a2449c0edf7fe7f89c86acc5e572d20f5d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5de99f7ed9fa8f737a711d4a343354af2edf0995660420f7deb4a5f4d727fad. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117c46ac5f2a1906933327c1dc503d2b3542213b3e1b3c2f381c1590e3ba090a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422afabcaece6bf3a8f2577e8c44a6d6c98bfcc9a1abeb83343e0b12f38970a8. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2892f47499ac2ba7d1230519f67ecacc03f98181d33a958552356eabc8303c18. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f2dc0c9565bd0ab50c683750462916e42808ec302f3d17b49f033499c1a112d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3955a0b0e25651388cefaed5877d7f3f14429c491b14e1c65292a604fa7d7604. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e96b759b1dd7b4daad5d2267a401c9d117748afba73945a3677d398adcbcc. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a8823b172eb15497b1e250ff1249204c62491b236c2f1e21c65a918f314b70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7583dea6c9a42bc51e2619fbf0b4f6bae73c1105e6a653d11be1c29342b1249c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUM72300454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47fdc98816f0d986fe2218962304195a62e7c15c6c679c8478ba3c2d245daf21. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaa687748262db83391919ba099a9596f57c63fb1c1ee488894aa07c02847af. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42ab31b0b0a62d1c2d90d731e06104c7384bd57500f1b321c4f6f795867275. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM72300457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe05387acdad74d3f8c5b9cc37ebfe626f36e9da2050dd413dc006bd4c1bcd5f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUM71907048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdac7ebef4d62c57c477f16459d8e4b2bd7d1c8dbaecad00027697a56a0e2f351. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCABQ1334065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a113de3d18301151769977a0462748a3ca5a00176abe497a00cb546c6b68ae1. 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/USUM71708226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf05ff657dd22ac67d3555d2e278fe04c26600b7fa9ea99bf87bd29bbaa6b6. 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/USUM71911243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f340ea8885015ab32abe18d996e0917a9b78db7ed6539938f24a7c40ab1815. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USUM71708227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2b046765bf3a68eb48d881a26d5e9ab2e1233ffb3b8d157e4bd6b752eb9465. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USUM71708224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6edf45496b47af29f756b10cf8830d652875ac4b534ad0f886b4c10382ca6bdd. 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/USUM72101215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadf05ff657dd22ac67d3555d2e278fe04c26600b7fa9ea99bf87bd29bbaa6b6. 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/USUM71911243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x949972ea49b1a12df0b808a1a98767a2449c0edf7fe7f89c86acc5e572d20f5d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/USUM72300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf442960ef7fe0780e4214d289409271dc62c8dfcb3a642763832a36bbb710317. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USUM71910924.
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 0x49656d5b25be652dc487ccb4452eb8a6204d09212fdbc65a0a674248884680cc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USUM71910929.