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 0xdd2ed2fb1b1fb4ffc6342c86200cfe42e8bc962f6b8351b24fa6bae22e0be813. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5815a26a-918a-470c-ba89-a8d28edc7901.json and https://artists.proofprofile.net/proofs/artist/5815a26a-918a-470c-ba89-a8d28edc7901.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 0xa970e4cfee5e9b7ced42ef79b728de8f242e165997a98c4815a9c26d46be4b41. 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/US83Z2033169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce2ac4603934e72d796520c8062c307069a8c57a326f0d65709b5743a0f33ce. 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/US83Z2218799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa52faecf2b664bb1c03dfa4faecddc64a0b4525af478f3dbf78b45106598acf9. 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/US83Z2129376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dabdca02ac85eb561be1d94a9955755d5c22ec40ab26b6da2a0cd722c6c25d. 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/US83Z2114015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef884626863c86188c1692a137e84608373b90f580127209e6b0cef384137b. 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/US83Z2043879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05d71a504357be70fdf373469ac145dbb54dea8f527a2c94f6762401810a4aa0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US83Z2043878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef884626863c86188c1692a137e84608373b90f580127209e6b0cef384137b. 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/US83Z2043879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc917a7eddfd19a504eafb32f02a457fafa78b0f31605572d12aaacca4084b7d. 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/DEH742032234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f92bec9d16f4c46676a33b1c6102819ba440169ee97449789cffebc22297400. 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/DEH742008442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e0fed4b30cbb7588e15c4c634cb9b0d448c4cbdc07a721f8842be3ed060b06. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/GB8KE1959917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb23ac10fbaa06a976c0f9cf625917f16d63c8e1395d52e7a7cd2f1c1cd3ca33. 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/US83Z2146027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff8e7f8ff439c3d23b23e509201feaa4d58cd6582f9d03b2bbf9adaf686290. 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/US83Z2214857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x562c11f183e11f71c6cfc1d0ed3be009cf95a0dab3f22e091d88d522dc08ef4b. 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/US83Z2119775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195351bae7fc1fa0906b310d12bb3f5946afc576c782a0940c61e0bffdfee9e8. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/US83Z2119776.