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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cae3ee8197ec010f35624b8fcace857fa2dbc6c14a14fce9a3005de97de952. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61e3c79a-7ed0-4509-9208-ab07fd988bd8.json and https://artists.proofprofile.net/proofs/artist/61e3c79a-7ed0-4509-9208-ab07fd988bd8.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32513d5978530425d2812ae9c5a376d98e5744b68b3cc05977d0f9fde084426. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:44:27Z), 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/BX5QD1900001.
Favela City (feat. Zeca Baleiro) [Ao vivo]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ba91e71d74d71925245eb40035d8ab1432c0bd6e9b3d524b7d936bc48ad78d. 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/BX5QD2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2871049ef17629d1cbcdc4b7e53850c5bfd50b7814c29bce2f054092cdfc4edb. 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/BX5QD2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae62d59de289f8cf802c2bf24289db910c104dafe7054b92db4a2cdf72b33c7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BX5QD2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb3314220a35ebf16d60437b2e9db8cf77522df76ea29b233ba59c0f472d7fb4. 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/BX5QD2100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56dee5841f59558e7a4d209b1d5319493065f8971317706317ab54cb1ba16d3. 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/BC1G52100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac3848a2751971a3513dde778f3cb8c352a3b9531dd6186a7036121a1f4bed5. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/BK8SG2500099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743f8b1c503890728c24a102c4f72bb04943ec3954272c944f33a9913142929e. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/BK8SG2500102.