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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ebcc01746f00749376c41193bf595370e5960107a7379c42fd1781ff0a4000. 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/dadbadf9-2288-4f7a-8599-dfea92352967.json and https://artists.proofprofile.net/proofs/artist/dadbadf9-2288-4f7a-8599-dfea92352967.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe746f5e9d64e4c61dd6fb936db9ab093bdce6bda53346e2d11a43c5a5da66b27. 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/HUA611300240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e30fd641786e81ec4834e1a0749f853302d1adfcd880938a1b0c8fb5e1c7a8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA611300279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bf59f8abcfe2e352491cb0764ebdac0c03c19deb01dbd330397dadfcb0cd94. 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/HUA611300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d67e6427812ad2b3f69fddc99869991f080773db66c48075936d0152ef0d51. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:02:09Z), 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/HUA611300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x244877f740cc8d7dfbd694104030365a110dbfd0c53f7c5aac535e80964058f5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/HUA611300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80003205b0de97c36f1a369025302f6752c68722e721c7db2e1351210e4c9f56. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:57:33Z), 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/HUA611300161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc7113f394c9915521f8cf977936d174b4eacfc672c09a5267fe2da5b0674ba. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:41:13Z), 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/HUA611300261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e6b115f320b52d55857246848a09103e8301918dee679c3dfcb1cec0d1ecd3. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/HUA611300203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd53f979ed84baa4a562810481b8112f9b786160574a68a486e7a9ce2f4e2f8b4. 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/HUA611300032.
A Napfény Íze (A Nemzeti Bor Maraton Hivatalos Dala)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4869b3894028937f37a143931665860667d98e34784235c552271b4ecf7ffd94. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/HUA611500710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da23ddd43b60eb0d77bb182242004315239a7a8c6e3e2b72e70423fc5440284. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/HUA611500713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4703d922e614bac87b32f1118bb39652748d86556bc91006f3918af26bd28f6d. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/HUA611500716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0241e28ceab2975242fa9b871b9f1ec4eda53a81add79f16f615b724fe1794b4. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/HUA612500498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7611c30b32419894b953f9ac7b29d4dce04a3a7cffb9e409fe11bfb08f7b3d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/FR2X41604730.