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 0x61e60c671d8f8c4a779342c5937b200bed4befd0dda8dcb70bb9135212e4b8d2. 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/73372f32-e751-4c65-a007-ab33887565c3.json and https://artists.proofprofile.net/proofs/artist/73372f32-e751-4c65-a007-ab33887565c3.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 0x302410278530eed0f2788976ddece07452bd913a906f12d08fae60810433e42e. 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/BRB6N0800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3292612ff1c524b0266cbad959a73ead8318a5c8d7ae36448a814ab135cc8d7. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/BRB6N0800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x307579dd9b3b7855836b060716c9d23496c831897170f763c25a65222462659f. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), 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/BRB6N0800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa39e522c6209dee3469b998454da33c304163f74eead3277247c99150cf159aa. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/BRB6N0800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0c2db1cb46f6dab5185749dc35a1b65b11e3d02e39939c0ad9681fd704c7965. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/BRB6N0800007.
Um e Meio: Coletânea Bootleg Caravana Holiday
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb83c8e147a99bd5b15f4a59bf09a49c111212e3e8790382acaf672f1db29d1. 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/BR8TK2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44874d585602dd05c09d108aedea1c870f1db30f9f28478db00b033f70eb4d2e. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/BRZUG1100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caf5ebd0f32a6f12a61bd389efc8f64d69ce94da88a1eb38d79f59880d54b37. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/BRZUG1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ca95855138516e9adcd2abd38a2577c68dacb70a831ac19261ccecb50f0e6f. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/BRZUG1100005.
Eu Preciso de um Liquidificador (I Need A Food Processor)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d065f640915363427654504d4dc9bebaa48ce9607bfc28ae8301911648d989f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/BRZUG1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c701e96e02a87346eb67cbe54a9cb01e536bb4118b3e7f80caac02df7f3a71. 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/BR8TK2000017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85db173acb4551dd6e22a3e17c1870ac32cfaf9b4113fc54e44c44a43576799. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/BCDDK2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb290e54d9720503f5f038d22301e5082fa34fb5e4d13a334b2920ba087b2b9bb. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), 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/BCDDK2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d065f640915363427654504d4dc9bebaa48ce9607bfc28ae8301911648d989f. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/BRZUG1400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34a92374f6b1c560a50912b4390a94cc794e853752de9416db6f8ce525fb358. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/BXEBC1800004.