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 0x1288e65679c7be2b1540dab6fd89ab742708c64a11e0b4d486dc75e1802069a7. 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/40b5229b-520b-45eb-b9a6-8fb344fecfbd.json and https://artists.proofprofile.net/proofs/artist/40b5229b-520b-45eb-b9a6-8fb344fecfbd.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 0xdb653e69d615da4afb6a5bda9ea3f07f00ac0f22ec1bd4635e9a388d4af4ca7a. 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/BXX4R2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4832d01ba4ceaeac27d11036f150e5d9d9f47d08b5d3a89ebeb9af9057a94522. 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/BXX4R2300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595840b7716317c9e22f63ec4c8cc11a1f4b58f00cd4735235e9f4ffde74bad9. 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/BXX4R2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39743d29b174ae1739f49cfb9ea2cfa5b74dda544fa56e52ad53d31429180036. 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/BXX4R2300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d71e264c0292fef7c7058f5b868fde6d4727ca632ec7092b775db9d2c275aa. 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/BXX4R2300019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64cfd3cb3b9b07da1d53398f1ff94065425bcdf57a170d39859c74e8a57f9313. 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/BXX4R2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb476a4a2bf1d1aa6555388952c728f7131bf0a6b5547604157c2f945e700dd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/BXX4R2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3ce9f0bd2166f9948b57ffcb72ffadc0f169542df556a3621d072725bafd3ab. 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/BXX4R2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd86a88f1e5251ab08b9b6374ac23c8d18cb2ad53d4af2729d24c4e91fea2740. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/BXX4R2300023.
Avenida Paulista, da Consolação ao Paraíso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a326fe112836804713f409c977f7e3924b09b691685b62310409ed7672d67. 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/BCRSC2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb662befc0f38ab8e130cc1a416732d7b0603b139ef1068c19ee2d9f5704748fa. 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/US7VG1515554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9962949a02a00e23567c722a9c3b4308bbfda352fb185da6304c0e1cf3b9c7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/BX0GC2300002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75beb8234a81fcae63396bbf05cb0e87b4dabe590514307613586a47e80f177. 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/BR4GH2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f831fdae431f20a16fd1f93969941188934e25d413e7e1642861553286e2c8e. 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/BR4GH2000006.