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 0x42edaa6bb815f54367039493b7555b02460f2ef365949b7f1d7ca5e660e10191. 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/44f8503b-ed5e-458a-a44a-397ee7c43b69.json and https://artists.proofprofile.net/proofs/artist/44f8503b-ed5e-458a-a44a-397ee7c43b69.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 0x76662c5998a550dd472a5f3bb734cd8a19830a5559af6cda9880a05d92dd5fe1. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), 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/QZHZ42029339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf2d1f19ee1dc3588e726f5a43e357877dd572fcfea1ed3b51f5339432ba4b31. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHZ52076062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4b6e5919b1df52bed97d31e59bac1f2453bfbb24fc39d2facc471c0202c90c. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/QZ5AB2139104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb5edee6990d00b8c0f2c64be80b621d89f310cc2fe842330a27094df793f3ba. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/BCL562000004.
O Jogo Virou (Ao Vivo em Feira de Santana)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x643317aab5c6ddc06e867760f6776d2654ddc0894ae81a93905078de58320a4a. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/BCRIZ2100171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9108b0f17aa3dc4f5f1d5587d4e9768ec57caeffc26d468df1ec95b98387503. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/BCRIZ2300291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2921e61f5aecf7ef210b451f639d049e649aa7635b5bc47bc5b29d99598d7b4a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/BCRIZ2300296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61ebdab31acbb4afe1ad7c4ef92f44447c7c64edcf2d6744de30e0a89054de6f. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCRIZ2300822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb5dfe5811e1e543ef91dbdea5c12357c243eb39d6387544a4ae915c49ae812. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/BCRIZ2300821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aee9036eaf43744850b4831c8bbeac1735510bb84c9d7b1b3d8b269d39d504. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BCRIZ2301215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd542372789737613a96eb7c647ddeab747e39e83d7fb3a55226e892246826d9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/BX7EG2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x212d3d8a5a8504db0d4e20a65f7fb83844b33647c56dad3f90442993e9cfbacf. 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/BCRIZ2301692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2174685c05d660d90ada02ca14b5eadc74c4e4789da539180dbe171ab422af2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/BCRIZ2301696.
Bloquinho do Bahia: Passinho do Jogador / Corra do Bahia / Bonde do Esquadrão / Hoje Tem Bahia / Jogo Bola e Danço
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed068f2ca257f2ebd7ae399c8fd182688d8a62e0f70120a1e6cd1b727198678d. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZNJY2411488.
Diferente dos Iguais (Repertório Novo Volume 5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee07ddae18350d4165709702437663dae356d2d6e558563b2142c90674a77d5. 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/BXUBN2100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8015538b984b933398b377f06a6340c3077472082b65210d5baafa2c4000f3da. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/BKTTG2200021.