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 0x2b815645c290ca183178dbadd7a81dcd164ebdc742727fa9fa172476f6fc7189. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebdf0eb4-d152-47d2-8609-7dc76c2b262b.json and https://artists.proofprofile.net/proofs/artist/ebdf0eb4-d152-47d2-8609-7dc76c2b262b.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 0xd2f07a57fe212c1bb1abc11d2b5e72a1c2ced52416fcac209b956da4c5552fe7. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USLR50100438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd293c973766777cd92d1082e8438cc08057dca28474195e574991b9a0cbd437f. 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/USLR50100346.
A Journey Into Sound (feat. Kenny Muhammed)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6b0126c116e3eccc3ce43a721872e23bf34013556aa79807710e850ad54f77. Chain 2 (Bitcoin): anchored in block 958686 (2026-07-19T06:43:29Z), 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/USLR50100429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7ffbb68061d54d1f4436199f80eb5a7f379f87cd48d46e0b4325a6f6097acaa. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USLR50100430.
X-ecutioners (Theme) Song (feat. Dan The Automator)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e72ab9d85c519d4da00c635b44d50fa4c2584f47abfad1c886011936c4923d. 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/USSM10104812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc5cd1e8221bb43823769f8cf6adc7ae63a7728b2b64778d978b152aa56c473. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USLR50100431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ad903f66991c5aca37982ba217527029a7bb93bdd539f631977cd414dee87f8. 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/USLR50100433.
The X (Y'all Know The Name) (feat. Pharoahe Monch, Xzibit, Inspectah Deck & Skillz)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7bf2fcb6f9d1c8df83c98c1e75575ebe0bfcebe48ee41d10e33f4788ad18042. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/USLR50100434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0bff16ce43cbdf0304dc9320835289de2b677d8abf769e0ca94f3c41357fe3. 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/USLR50100436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6fa9a6567943ddd0b8215d5f8ddb03b5a4c26c03e9cf5ecee197e9053a881d. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/USLR50100437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf23fdbccbd584b920f8c8ca0496cf486b9adf23b4ac23af998fca711c8ff4ea6. Chain 2 (Bitcoin): anchored in block 958117 (2026-07-15T10:26:33Z), 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/USLR50100440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9975017ec3e4bc9598d0b0f9beea3067be558a4fed4e64976532a93674dd4c1. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:54:35Z), 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/USLR50100465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x332994343bceed82bd5e51b87d79005861b75e1d31b659d2b661d49873e5b39b. 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/USSM10404939.
The Countdown Part 2 (feat. Blue Man Group) - Explicit Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba0c40d8295fc4a2618c20bb1763f9f9d9d6aa70ac2a6ce993b5a71360e9169. 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/USSM10403217.
Live from the PJ's (feat. Ghostface Killah, Trife & Black Thought) - Explicit Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc08e4de7683fcf542dd8d3eb828922fe1aa79bd95655656d1d905cc1d556771. 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/USSM10403220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f4f99091ce3ce05de3498f96b30a621e9c9ab77872917b46463e40315cbad8c. 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/USSM10403223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13d134d50da0a24c20bff0e7ceb06d1b4ba8ede8b8102531e36a54509f6d7c35. 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/USSM10403224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc6c92b81d3c26e9c50420e6c8b1ebfa5a7ff75630c2a8de58ccf18dda2736d. 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/USSM10404940.
Back To Back (feat. Saigon & Scram Jones) - Explicit Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bacf5b4e9e61fd00deefe155525cc1007e389fad62c7a0210e503125abd496. 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/USSM10404130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7d8dd592f463b342ef11f2a9647682820acf3f2fc3ff5d356242dbc49d0f8b0. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USSM10404129.
Get With It (feat. Cypress Hill) - Explicit Album Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46b4b5a7e09d3b255f350d644c834daa985fa093615c066f1a42ab127e9c7bcd. 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/USSM10403219.
(Even) More Human Than Human (feat. Rob Zombie, Slug & Josey Scott)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99a30bbe079851554a1d02b9bc69a183e5eaf7f50347c6e8b112db5f135f7bb9. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USSM10403221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8149345851450d44fe78cdb91101e35159f4b1b58cf35b648457492bb5805c21. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/USSM10403218.
It's Goin' Down (feat. Mike Shinoda and Mr. Hahn) - B-Side Rarities
Hybrid Theory (20th Anniversary Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1514a95688ff1c1343a312f62d9966478b398e6b023c271882b5671cd9559c9a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USWB12002204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fb23a7542f649ec42d3f8df86f990b33429bf5cec68dca1f850d6ec97b8c8c. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/USDJ20301057.
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