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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa219de345fc26a40a9b0786b7536badfc0046fa1a15484a7ae18ca8c64663ee2. 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/4e981d8c-6f1b-41b9-9f36-ed40b4725ada.json and https://artists.proofprofile.net/proofs/artist/4e981d8c-6f1b-41b9-9f36-ed40b4725ada.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4c077bd29c57e50357a6c69f101fe44ef2076ae62e2c9ece8623be1a8fc44b8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA210319101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb37d8f5eb2c6df9be8a208506fe7517953d2ded466fdda7ac903319df227fbd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA210319102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26dbf21be93be10b095db2c6926be921ce2912915b183a261126a99fa940b388. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWA210218401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f290b3ae207eaa8380831036ba781dce162b613f5a65ce6c47c5b3d0c4c114. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA210218402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6c0cd1e02dbca20c7ebd6870c91118c7dd3772d96d9853f73647a2b79f57a7. 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/TWA210218405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82bb5e3561b4f5633a993a05690b43bf5f3ef7badd701d62913cd4cc6b49b2e1. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA210218406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc8bf6c63393181530ee22caa197612816a657b0b4da95a70a9d56c703cc1830. 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/TWA210218408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d8bef21d0131a8de9d1190cb2856d164eaf467805915df3df974aafe818b48c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWA210217401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda467e298b08e611ee78d96fc4e7b88e10f1bcdb2b09b6d57b8b4315cab07261. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWA210521002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a4b075bf3253a6cacda72ae9086aade4ea348ba3a299a72c1700923f601cd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TWD250318704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21a0828f9321c42c3b58b4f8802d6870840d137e140c344f6ba11722e35301. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TWD250318705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553a985d5c950528984c133140d07292f1dcedad04081ff7df5cd14d861404d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TWD250318707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55129785def19cb6a32457c9dcecfd0a95d8768d27a1bf4b53db3a07f7e96099. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWD250318710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e3c3dfc2234d237ae469fe487e43ca4b07fc9c86bc133153d0cfa509a8d2fb4. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/TWA210420005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7e84e0b31977fbb622dc9704fecfeee297184b09c2467a99e37a2e0f15f3d9. 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/TWA210420013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e81c87507a1974b5224f975fcd6b2227a81d8dc4a880f2ffd9be92ddc80dc58. 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/TWD250318604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b655df0cf783a839421830885a64fd8a9e7050f0656819afaa33ed1526cd6a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWD630318502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bf142942705f515a1e529fce0dac83e329683d844dbbc5eb85aae94c64b782a. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TWA210420105.