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 0x3aabb952e9fa80b00d3c898783bce6f3c53683abb32c039fe79bc86d94efe0fe. Chain 2 (Bitcoin): anchored in block 953970 (2026-06-16T16:09:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/29bbba30-cfe6-480f-98a9-67bc4312e5d6.json and https://artists.proofprofile.net/proofs/artist/29bbba30-cfe6-480f-98a9-67bc4312e5d6.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 0xbf4ea521dd30f5d234865119be5335aef67bff34d93c7abad61f01a122ca8afa. 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/BRGDT1500083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95d3e56a7b3bfbbc253da9f3874598bc9dfd2df466aa75b16c1e7d94e793a511. 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/BRGDT1500093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c91b867ca6a2b5811bf5768617f9ff4cf027dd6e965681830ba4c324db3a9cf. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/BRGDT1300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c74ad5569d8aebb29c7a43c037cd1da2aa8a2118dcdc69a1ed33b31b0cf6f67. 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/BRGDT1300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e0410fafa010ad8037eeec9a635e3730983ea63af31c6dcbcc28eddedd7004. 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/BRGDT1700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0055826f1eb07c78250a45b35b984dcb11499d5a9e3ec42932eee75646569132. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRGDT1700051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb08a4e4de9c3ea5580169b219fb6934075cc8d947c306e859f96f3caf104ef. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRGDT1600023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe620135aa4d8f6d32d31b8829d37d65461bdfd74fa639d390ae4a79c81b7bed3. 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/BRGDT1700057.
Viola de Ouro - 2º Racha de Viola Vol. 02
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9f6084a0154be1128196960ce3c9087b21ec69fb705336f246ed0f8754c6ec. 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/BRGDT1500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x210a0a5a3499de8626cb8a5897db52897666674c661426c3c9acceb4896f9441. 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/BRGDT1500042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97daa0cee0f9c7a2660d7246c64d554c01719e293ff0933d9cf32fde2e5a9666. Chain 2 (Bitcoin): anchored in block 960231 (2026-07-30T08:33:28Z), 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/BRGDT1500049.
20 Super, O Melhor da Raiz Sertaneja, Vol. 01: As Mais Belas Músicas da Raiz Sertaneja
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabee0a07baddd152d32c5cd5e19c50112a456b0cca96afab7c9ebdf45b89b84d. 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/BRACP1100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6967cd8cabcc5b14398d9c016b2a6e0f4ced4e1242e92b409accb08e64e0985c. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/BR6211100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e47b936a1ce2a5341fd2efbc52ce0c6f2ec63ca4a555135eee60ca8b2e5603. 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/BR6211100031.