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 0xec4aa2a4133f873c8d39809b5b23d7bc0d05462f25e4bcbf65f987855a10b400. 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/3068f2c1-b1d7-4cb7-a876-03293a19f294.json and https://artists.proofprofile.net/proofs/artist/3068f2c1-b1d7-4cb7-a876-03293a19f294.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 0x21416a19209f1230369fa01c31c08e892b7e8459fcbdf7be5858e9e019072b75. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/BRDXT1600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71b1ce8c6045b17e47d5286028cbf1b35968accc016062325651137f6ab6a032. 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/BRDXT1600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433e9a19a88705341fe48d2eeb3fbce7cc830c199e206887b33b11fe3c5f128d. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZW9M2217981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x041ffef162b6a6213e1cd51e0787ae4d7fc5337cfb3cf1a22a6129a831c5cc72. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/QZW9M2217982.
Pedimos Paz e Liberdade (Remix) - 2022 Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ea81a8191daa58ea7a77b177eb6474e43eecfd5047b1fed47eed29ca0476522. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/QZW9M2217985.
Se Á Morte nos Separar (Intro Deluxe) - Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7355573711185adafb0e416ac5bb31c604463ab954274c50ad87e6d3c03013d4. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/QZW9M2217987.
Nosso Bonde É uma Rocha (Deluxe) - 2022 Remasterizado
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5595347711cf9f506bb668240ca5e545010dc3885fc4c422e9ce9f884bf3b85a. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZW9M2217989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82fe1264cd259f0e03c5e5aefd3074ae6844b810f04a409fb143ba3478424e4d. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/BRDXT1600006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d4eb128251ce06b136798719101c35875dfddd2bad28392112a4d5d1308a0b6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZ5AB2010698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9262e2c2acd6e253b66cc3b8501d71aa8ebf93c334904931b083b0a1c3aff65. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/BRDXT2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x881910e4e3dfa20e07fd0d9b5939c8935d0dadf62101d4bf2780434477d75fda. 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/BRXGL1300008.