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 0x445a521521ec8ada6dbe3544a3352df87db52a097339c7fe1b40cce2884dcb97. 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/bf4a07ca-8963-40c0-8e13-5ace3d5820cc.json and https://artists.proofprofile.net/proofs/artist/bf4a07ca-8963-40c0-8e13-5ace3d5820cc.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 0x49a68b827a93f877938f253720393d197349d6726065d7b02f2bcafcc0366ebf. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/NLA321800187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2bca8e46eca74b4533818ad61c76e0ae693afd521f0e802db8485ae10ed176. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/NLA321800189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cf478480f26459854a897dd84b2f6398df191a55a637e924499316a7c051b91. 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/US39N1798755.
Telephone Calls (feat. A$AP Rocky, Tyler, The Creator, Playboi Carti & Yung Gleesh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbb8bb150ed1f83e91a5e84020dc97718d4a7929389e2f95b4be9342cecf2c. 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/USRC11602562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7c4a9001a0676692c80ebbf3c59a39d6e46f6570a1ffd8db45dce757c46bd10. 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/QZPEW2114186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a83836956ffdfda626fcdb11e02f36383d8c11baf180c6c902b14683d0428d. 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/QZPEW2114191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719e8be5df15099ffa5e54314ae8cbc9f1589347ac0b9b9ee9ae0bccd80fdaeb. 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/USZEG1502277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38bbb8bb150ed1f83e91a5e84020dc97718d4a7929389e2f95b4be9342cecf2c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USRC11602562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedc9f02f9a75cc0cf8a81c428dfeb7c92d34a151c923fd10c802ddfea8a636ed. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZFZ42380511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8ccf5c35df65829c462e669c0212b8115241e2ddd4b63bbb858711d48bdaf6. 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/USUYG1105636.
Most Known Unknown (Dolan Beats Classic)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6321e1c3cbd7d9ea54fe043200920e01bfe1a35b9bbaf91e7a21d976a3c21a7f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLD91713642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7df2f4ceca592926d75c49013cd3fd658763b36975a01b8a94de0ed2c5274ef. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USLD91713644.
Interviews (feat. I LOVE MAKONNEN & Yung Gleesh)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26bd42efbd8fe4b259a31ebfbf89a681ab6f9cf63fc48604bb93a902b9480e5. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/FRZ111500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb51d2a86f65497d68a3eb1ee741d76846036677e7ac52366fbdc2afa93bfd84. 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/CA5KR2074840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09e51b296fc8bd8180bda4c36886b4ef0d8b1a58a392376b133e66617ba0b44. 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/QZFZ52134195.