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 0x31628dad3087bca7290bf94c32e1c671dbef182ec03679b5ed29d0569c2798fb. 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/11ac5ad8-ac35-4a58-a3d1-6dde6bd13a10.json and https://artists.proofprofile.net/proofs/artist/11ac5ad8-ac35-4a58-a3d1-6dde6bd13a10.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 0x1a5854ce1424f9152d4f904b887c1baa2ac85c9334519f9101f549505d924c2a. Chain 2 (Bitcoin): anchored in block 957565 (2026-07-11T12:18:39Z), 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/QZK6J2071739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ebfe61fb3e9c99a714c17c31ead1e8c4e660631273b438d772dcc352f25217. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZK6K2078613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a70bd5aba99a25cdb09d1f852009c4fbcd7cacb388c28ccf9feb46f3968d6c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T03:32:45Z), 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/HKH142006002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754e7c9e6d5fa96c9b497ce71f9f9fb8a0d91ca74a84d63e15c87a93d0ef8aac. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T10:46:37Z), 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/HKH142006004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xade82b3f6ff719bd350bea6f7967679fa6f013a4794b0dbed33a285bcb2e941e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/HKH142006005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a371ff4bdaf82df327bbe9149e9ff1dedc16c70c5057857c6de1d43189d204e. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZK6P2113005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f77db2adbc05f526ba3bd2445d8a2993f09de3f75ab50fa0c579c3a6d51444. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/HKH142306003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86cf414dbbaaff72e03622865fe094a21d5df7ca9791e3536af519845fd53eaa. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/HKH142306004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe1666bfc507496d12b61c942e46c29c73dcc0763bf33f0b0d5563c347fc5c89. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/HKH142306006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd10ec4264109e7522dc9925d3ab915a9e22018f60f0234c08d581e5a8e6f3b9e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/HKH142306008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d4f70243ad09490a1cb61ff4a53506620d2f1dce28ac91d1fd898882b8a741. 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/TWCC32004944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x272efaf8c97e8c32cc79f3df2f88da697264ff4336d8f946ffd794f05b1a964f. 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/QMFMG2370138.
It's Beginning to Look a Lot Like Christmas
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7787df17300c340aad76bccd67a27961ffaaaa284645042c2c2530a1e1e61c44. 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/HKI492426203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fd998ec024e1eca8e09d6575d5be372ddf8b8681a3c5d5b4f546165bb2d2676. 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/HKI492450214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd625b1900f5cb3e22fec7cedb79afa9d1e621e778fe557b57e2a42f92b6813c2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HKI492426205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x652684e95f1c315b1edf1ac0e1567921a2f84d18150ff18c827840da078aab16. 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/HKC492400010.