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 0xb76fae20f9f9bab99f15410e8e624631e54a30838a6282bc4cc4f898a58fa7ba. 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/8d6c2bd2-a1e3-48a4-926b-2803367c4535.json and https://artists.proofprofile.net/proofs/artist/8d6c2bd2-a1e3-48a4-926b-2803367c4535.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 0x15dc923c84c01f207193468ca8877ad8ff2832912c289b23fdbb9bc5ee5c0a26. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/QZEQU2116650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94000d6523eb29a3382a1fc60d0cc6f7db6a906df24233e7ce5f26ee7c09c33a. 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/QZEQU2123543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52057d42e18a88e10801698056fb5755dce284285c2fcf09744dcca14d2b116. 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/QZEQU2146432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3663d2a1208b373bf79b13b9e20452dfe93b190be82c94e1067d44310239d15d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZEQU2146437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53da3ac9304ad43e28e24ba710887cbd76fdd5b017ca27068ceed462182f734c. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZEQU2253067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdde0f22b90a5914d2b77e220cebd2a857b3e2c9989302167dec1e429db3b050. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/ESA112300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d18227ea8412b9a812749aba05f7af499715b98cb30048fb2f32b0cc93e2a1. 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/ESA112320458.
Chama as Quenga os Viados Anão e Sapatão
Seu Kuka É Eu (feat. LEOZINHO PISADINHA)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44aac20c5b7bcee54adb54858ec6c4eff0cec7c30d1c82aac08782055410c73f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/ESA112433617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a0123620f8602ac300b38fa1b81123b1801cd11b580c3f42dea86db51d362a9. 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/ESA112454048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x994cd7767ec2ed7c2f154b728358a8ee20643105f77873f63196362d89524e67. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T03:51:05Z), 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/ESA112565538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff09ae63dab20d1b9d8e0778eb588a081c542748258f2e1f92c05c030a76b33. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ESA112573261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7138259b5f52a26ed608d4d6d5b3f005ac98266124077675e67acf260f6e3f89. 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/ESA112574495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f65a01b188b88af54301dcc6e890dc2503ec9f01574629d7efc1d66aab0237. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ESA112574496.