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 0xcc47de26012a15d6a8311eff5c96e2e92a95e8c962e90f7e77bb4270109523d6. 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/34273867-408a-43cd-9062-5cd6a98c4be6.json and https://artists.proofprofile.net/proofs/artist/34273867-408a-43cd-9062-5cd6a98c4be6.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Dukes e Rodrigo Tuchê: Cada Pessoa, Um Universo
Na Carne: A Única Saída É a Selva, Pt. 1
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 0x55f1980ad5fc3a5ef7441b91f291f8f4b987efa6c9e5d01ec3187ae24759c1e0. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BXYA62200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f005901e4bd498859d49aad575d57204fb808f4fdced37512b62cf64d25a856. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/BKD8J2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba7b81d43f89a605db4debfd4d68a226cbcc72e682c0c4cca7180fc0fb88868. 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/BKD8J2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fe92ddf29ceaf7a0d3bbbe12c8618940a42627fde6d737ad82dcc9f083e44f0. 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/BCMUI2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5b21c8c8a94a4358db4022aa56cf8400313b65994bcc72a55d11ae1d306ea2c. 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/BR6YG2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f337bae136c6d86d37329a5ad86fe5dfd6b9870da22e1196c8d229d4603fbd. 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/BKE5M2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1776ad8605bdeee506a24cd53949ba27b73f61f494b8621df0324ae2bf7531. 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/BKE5M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0055efb9aa274695753eb8aaf0df19058570e65171df7a512f3d965b12eb96. 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/BXYA62400045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb206d74e7690e5c9f790bbb235b5493689fe3c4269fc7b7c2aa88ef9258cda8. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZZEC2405739.