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 0xda0128dee15363400d18d76fbfa22ba37a1509ddd8b0336353840f8f180684fb. 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/d933c5e1-eda3-4896-94c4-86583ce1af88.json and https://artists.proofprofile.net/proofs/artist/d933c5e1-eda3-4896-94c4-86583ce1af88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Girls (feat. Master P, Ace B & Lambo) - Single
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 0xa519cf60e92db13ad0b15e6f2a20ab583e155f4fc6b805aa79404683c15e1201. 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/USUYG1324720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741d0c8cf0800f9e442b0720e6ac9c24700c5b28d20ec1a261920b6694409f8f. 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/USUYG1324731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11d47fc40f9401150c82eb7c76dd73e0b1e4bd9511197eae2af8f5f3a1b07b20. 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/USUYG1116113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x043870ef41fb8c5e94e5edeacd0820d8f8eae256d9e86294cf793f1700e8ac67. 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/USUYG1116116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d5425d96b99c78bef77a1490634b8bfe9900f3b433a0422ff6e2309f8e0c97. 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/USUYG1116119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5559b024923e2a9aff4de61ccaa44c315b25f14c777ecab19900061cf8aba00. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USUYG1116127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71a9425ca3240756edba3fda1e4b4c0e5020196be3a2cc0f43ea69e5a3d8270d. 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/USUYG1110887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x907622bda476a758c770203e0cd038e8509e527d280061d1254c82ae318ec3e6. 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/USUYG1110894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0d05a3f20f0adbe9556a84021d3b691d21633af5d22e1cf790c51fd0c84295. 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/USUYG1110902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c02e06826256e6e7c771961dd0018944eb14bf9d0b6ee89f895e1d58d3414f. 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/USUYG1286123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b21fb9f9b3da8220014025f533731044ef16e73bee42d7b490da9f5c5810c2e. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/USUYG1126438.