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 0x25ea4a6e188b4ecc98c95f9ec09c081a202b4cfb85233350bfa4c11ba3ae817a. 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/7c4b39b1-77d7-489c-9787-0418825bea1f.json and https://artists.proofprofile.net/proofs/artist/7c4b39b1-77d7-489c-9787-0418825bea1f.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 0x3e14dd0776676490935527d85517c76d29129718fd2532a5f7b6ae4c3c8e950c. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/BCCN42200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ed0b364712db982edbe6479b7410d2410d65ffb7df6633eab6941bb61801923. 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/QZ5AB2351726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8709c04af4872251585a6644ccdc3ec0a98ac1de1b4eede3aae183ed86e504e. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZNJV2387561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e3150658e6c6e3dc5329a8c2c5d44f5f2b3026d0e280f6ae4ba2912d25a9fc. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTVM2392937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f85555575c0a55c7ec675e7c5739cf6d2f1b664828904d7e80505f4f21ea02. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/PT7YQ2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x860ad15103764158044b3c520ef4c03496e29553f62b4a511489f52b16b9236c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/PT7YQ2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf632d9e7e6ad5bd8d8d562e96ba5819bad05c22b9f7b3f63168000da6b10a17c. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/PT7YQ2400049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd40f579e689b7b23b78cc3dab523ea58cc82d574c9bcf9e105f72da82ca7042. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/PT7YQ2400071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebfda292d1a786d9317c92bbd48f3afa5cc085424b1bc5e348fcd3eb8f3b7f3. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZTV32567772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x563aa097af41acb3709d1df8b3ac46a36adb6705c8a34b79c31d03671d8e35aa. 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/BCCN42200090.
Filho Alheio (feat. Lurhany & Teo No Beat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bafbf6b67e28f5abab002e4698ced08c2cf0caef1b9395265f585cbeed83feb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZEQU2108134.
Ta Sair Bem (feat. Lurhany & Teo No Beat)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979a84973cf3b28ee7bda75d8ca6687d5f5de44a6583f7e350ee0e59c0009478. 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/QZEQU2108136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3050716a09abe6db5ffdc4109daa75f03d8e5c75b436ab304d48eeec0b65453. 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/QZEQU2108138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894646c2eb9d063e102400132405fdb0d475463a63214c4982742e2b79c4b983. 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/QZEQU2108139.