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 0x6c4e38f5bf8a86ec4bf90f5f41003514ec6926ea714b2d9ee03abd36635392f4. 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/e3e21689-edac-41e5-9dd3-b8a31ef39f66.json and https://artists.proofprofile.net/proofs/artist/e3e21689-edac-41e5-9dd3-b8a31ef39f66.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 0x57f6bc3b0c7547b8e184ac62d6193c6eaa2a0c1639ca18923d76e58f7fe16b3a. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/DEFC10600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edd3d7ac2dfb9965f60c0cbf67063489202fdb75b94244fb7403488fd6d4928. 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/DEFC10600110.
Go and Die (A Collection of Non-Album Tracks)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0ae9fce4cf879fd824a44f30f1553f66cd91681624a2de6606afcd2785a5d0e. 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/DEFC10600789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee08770f8516d1d7008e00571cc4d4eae9a6a7178fab7451d6b19048ac87d24. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEDE31910901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ffb82db9c44c9c6215396265d6a2f2c38dd37cd5eb07ac5716798d407389c97. 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/DEDE31910903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f4264bc8800f7c3bb135bafc4196498e8f3b8d3539f07d0eb5f8ff583d9636. 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/DEDE31910907.
Peter and the Testtubes Babies on the Radio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ae83fa4beb784d44d355f61cf0d1ae16b1828e83eef0522c2df2f1777742b9. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/SEYOK2238656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe262fc59a306f59a1e560a9d2b399514f0f968080938f89df95e86718121d0. 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/SEYOK2238664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf6063fa4d1700d528de504a7886ede5fc3d7eef6870cfdac96d01b50a75d8fb. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/SEYOK2238667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8c352f248ad2cee4f8b73caade2e54aa868d1f9584dc9adffb514e0425f01. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/SEYOK2238669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280f6b7beb035170be2df05bf15824714fab4b210deb5275cda5ba2a3c23536. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/DEDE32523702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b59a3918ae813133b6b3d8848ebc3d4d3b05dcbb8592533072ada4d03fc83b7. 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/DEDE32523701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa280f6b7beb035170be2df05bf15824714fab4b210deb5275cda5ba2a3c23536. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DEDE32523702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb765d3b532b3a66708c1d8ec9f430ce922e7e5c0e65a2b65613f98a3294ea932. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEDE32523703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2179baa9be09652f061c84c0f0530d7141abfb4a71c40e3c86d9c2fde2d1dbd. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/DEDE32523704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16834ba0c625a4ebe0401a67d877dabb5113cb55b2d284cfcbe4e72fae8bc7c7. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEDE32523705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70311d2306ef1e052132e320f7f5ace1abb9da0cbb827a0a9ae02b032a492b6a. Chain 2 (Bitcoin): anchored in block 957638 (2026-07-12T01:56:41Z), 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/DEDE32523706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5aa6e959c5cd05e387b6d67dfc22233d655a1342620d323ad490a8df8eebe15. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/DEDE32523707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056d2d8ea45f2f81256a65e636a1d29cfee0a8aa9dd5f61a4fbc96d0ea4f0261. 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/DEDE32523708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f32f310bf16536dd698c03c2c5af4f0bacee5aa73ffa228f1b01b4d26e981a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEDE32523709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1acf03ef314102f780028327a2d9c4cdab1d3e3049251e8cc7891d8e0b265f3. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DEDE32523710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2f2edb42cfb3946f2c1af441948595a95aee6f275e1f1dae918022c34146b3. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DEDE32523711.