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 0x2e3800f6609977f590fff7365862329a4cae94d35a945dca07535d77677daaf9. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/06b86929-26a7-4698-ac68-c1a1abac1706.json and https://artists.proofprofile.net/proofs/artist/06b86929-26a7-4698-ac68-c1a1abac1706.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 0xf30eee054caa584b8d1bc19723187ebeaeb420322f61db60ee2f8fc156b628ca. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:41:04Z), 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/TCAFO2174292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00455f6a3b3a3d8bc810f497e429f61fc940d23b258fc856b1dcad97f46fe768. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:30:21Z), 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/TCAFO2174318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f16aa0e1c0838cc9e5784a69bc92587d87d1726c91c59e784be058813d0754. 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/TCAFO2174320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08c353396021414ac020a34a17d343c1b93bea46792ad4ed0d1c72a1fdf1bde2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAFO2174322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27afe43216de8d756423590db0a036489eb01f8c0c06e6d08193e523cd48eb00. 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/TCAFO2174326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0fbb06fd4afcf659a1368b5fc2df3708622b2d75f1f6ba10e632183a544420d. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCAFO2174331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99644f4ecd9b4b068874d7fbf271eccb83668b5a55f228c0c57fde998674d533. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/TCAFQ2153095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e203b6587c78366e57374298cecf491e742224160cb7b7adc093f1477d52cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAFQ2153099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88257b20f86bf8443454a7c05982e3c583f8198cbb4b098a533179362102b71. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/TCAFQ2153100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dece5ec9e55cf02901bf82a7f0b6212d75462f8cb082cbca096e5c9358b0461. 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/TCAFQ2153113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1ea4ba43c7fb7f7e193930641aab7707849e3198584fa8774b2eb2ca967c00b. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/TCAFU2152912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bde98facddf207d70d7cae24ea7af45c74768a8db11f67ae357c890b27086da. 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/TCAFU2152916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42e1f2b4b6fce0149d2230ce9aef51a867301f0cfc9ea9158027b16f12056896. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCAFU2152920.