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 0x2b1fd8df46fd532e85c25041941369af8066c7421d40d80eaf55f16f453ceb48. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1dcc393e-aa02-4565-bb39-3bedb161fe86.json and https://artists.proofprofile.net/proofs/artist/1dcc393e-aa02-4565-bb39-3bedb161fe86.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
White Works - João Paulo plays Carlos Bica
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 0xa0049452a21fd9ee884678bc8799c1c3dabaec3bc53efa0702f889101045eb24. 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/PT8LX2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189569bbccc3e33ae3a13756c5a8a2c7a1b1e835f743ee0bfe65acc122db2099. 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/PT8LX2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed66f826b744e0edd81e8cb0c1205a4bf728f8cc2cbd59a3eb5b87561a489a2. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/PT8LX2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309f218f74e5e6c87b321cde7b03513ce8ade3465def3dca914624c42c87c499. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT8LX2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0006964ce9c7cf6bbb89773731bba2972c9b00e530def80b27f237cbc1b7717. 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/PT8LX2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc276f76e56ee242841d8748452945c4fe74766e141f2e330609ef5d1753d3586. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/PT8LX2200014.
Depois de Ti (with João Paulo Esteves da Silva & Jarrod Cagwin)
Respeitosa Mente (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433beae991fa87c1791b0b5b8c5431bfac554b0fb5cd19a1d1f454432a3aff9f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PT4BU1900001.
Envoi (with João Paulo Esteves da Silva)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e3212eca0b5e0a653925713d5f34b2d8a5785d3ae646b936fe1eb18bf4aaa2. 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/PT4BU1900002.
As Mondadeiras (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89af8bf5fd41f2b53c429dc9ce04eae52d727a19403844ee3e2a45d7e3a3ed7e. 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/PT4BU1900010.
NáNá (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40031b7ab19e755a621814b1f35f66b8cd1de0568d3a8f7239903f6a19ebcf11. 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/PT4BU1900012.
Alla Luna (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977144f7d34af9ea6545880f7ea6d5531f5a0eb37b468fd90da9ef3c7a5c4ed6. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/PT4BU1900004.
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
Derrota (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728bf3ad428b57e0b67a4ffa0c23974ce5c045dad0a7051f1d7914957f25ce2c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/PT4BU1900005.
Um Espaço e Duas Laranjeiras (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4136f590f827e12b2a714895e430840743337b903e85012ea697c0ecaa00542. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PT4BU1900006.
Canto Franciscano (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe824ef99ec826347b775fd897d7105d49ca7b1f884125c4c27a70b43065fe1f0. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/PT4BU1900007.
Vou Fumar Um Cigarro (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93959556a202d02efec02670566a7c98c2f0460a01b0c61ff9f7e0caa3701132. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/PT4BU1900008.
Deserta Liberdade (with João Paulo Esteves da Silva & Jarrod Cagwin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5e7e166697efec71f3356a589e87a2d2235c2499b6c853c2fcd63e6bdfd292. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PT4BU1900009.
O Sítio (with João Paulo Esteves da Silva )
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6f902d386ff600db5542d6b9299137bfd47026b54a4d92066c1903026ae7fc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PT4BU1900011.