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 0xf4400a308783b81b78296b2f166448b736ce5ab9330bf2274f99d9f86d76e431. 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/9b771588-7ba8-459d-9bf4-526836b65fd7.json and https://artists.proofprofile.net/proofs/artist/9b771588-7ba8-459d-9bf4-526836b65fd7.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 0x4e075dd0916cc942a290a97c08c5cb56bc7ce038512bc0a13ef7245f9da85524. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GBLFP2453780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd87c8e9d84923609c0ff8c3b6779ac34ee08bf69d20f1ec3a10983fc7767f1a7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBLFP2494811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x103ad628a770f5df971afbcbd805dfea06edbc8f3c965438d4f8839c81001634. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLFP2496386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce66a0d2645f7a837e3cb1c710d393a719c2bfdc524960832eac890d4840911d. 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/GBLFP2494832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2302164cf534d8789fc5b702fd5c60576a0859da1306b90cf2027d5a36cf6535. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLFP2494744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb70992703d833f57227aed2fcf33c012bb42722d0a4041d3723d263405c7296b. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GBLFP2494809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13a1439dd73f144dd09d95d498506c4bc199fcfa78434b10f1d1961cf78dca38. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22493560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d751eefc9a742fc3e13cf6ce0fa1e6c8d85de25c28ed3ca53f08b99ee1e510a. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/UKXN22493647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e2ab88a3a1c12c4c61ea5e89dc96608bda18c88c4fa42a78c765db5e689603f. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/UKXN22493854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c395338f6bf980fdd09a25ccbbbb5277013af13ee5e2198e9e7fa535677503. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22449140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b007d69ad9b02a065366fadf5d69043b1782322fe945bac7c9eff4f05e106b4. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22449100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc942cd31e88d8552b7326f822865d966e236a323cd7df3c497d2075cbef1d0d2. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GBMA22449055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a3d18912f7a8457460e9002ed209ce73054752d0487c600cb2c6296e6b60eb. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/GBMA22451689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47d67d9aeef8676b3b20ef592a6d540ec8215ab1fb3cd0316d0da571b112cc6e. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBMA22482721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb221d1970a9e9c6b04f82f4641f5de343686496ccb5660bf08ab6f9c99b1c9e0. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX53U2410372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e55fe5aea64840c333ab79f94f55085a351d85c71e10869522ffd8005c276eb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX53U2406154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82b940001c3c5050d5383f23a9bdc0be3a8219417b434dba2b12add2aa5ab1a2. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GX53U2410313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9eebfac2c9719665023fd9e899ddf79242668c110bf46999a6f767a89b2b28f. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/GX53U2410417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00628bc995d8d7ba9b5afb94724f7d583d92113a01601c9d207940ea1cfbcf7b. 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/GX53U2406201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24df1acfc3aaf3387763ac858154eb6c27b0746ffd3011b0226a5ded3656d25a. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GXF9Q2421023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa35762e033b1bcdcc89f14958567078299c5cf124b5d8d200dd05a360d3a00. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX3Q92543762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3baab7470df041eeb0839f7867d50470726a5d64512670ff68236279df1219f1. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX3Q92542937.