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 0xcbbc50838832badf502807cc0b7cd382580f2003ee05a0d71c51647385e9073c. 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/fc309e54-1d90-4b9a-9dbe-428570a847b4.json and https://artists.proofprofile.net/proofs/artist/fc309e54-1d90-4b9a-9dbe-428570a847b4.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Zate Slovenija (DeeJay Time DJ Svizec Rmx)
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 0x8c3b61bb3503b1a1b9779fabc376f785af05153ad3996653476aaa199793702b. 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/SIA631201258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb46ded7ea2218309322ce116836a24f87280549a121311681d840a9bd8323e09. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:28Z), 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/SIA631201271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40f6f850940ef702629f995ee48525711f819a4e798a91928cc37b50f4225e0. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/SIA631201273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f99c9643a437995c57104dd223480556343e4ddc2659f5ea9da47a9e4359e4. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/SIA631201274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bcd5dfb6faa7503d3deedb068d1d16a257b18ad8adcb169e57e8a558f9df76a. 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/SIA631201275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a20d15516c14fab72fcf3dc57d2cc407c3987f7067685bcae312009cf0cce2. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE5BU2495699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03a0c2f972500fba24526944790de2507e788476cde7f61fbcba8c49bf994989. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T07:36:38Z), 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/QZK6Q2485804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6f9fc5ce4f9638f9984410e6b7d7dba64f4cd8ca000d1caf629cc5c68556a7. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZDA72551390.