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 0xef47866caa6724529e23368af8bf2731313b9a5d9c32ffe0a48f80f8f9160ab7. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bcd5a1f7-a1fc-40a5-b905-c57be107cfb3.json and https://artists.proofprofile.net/proofs/artist/bcd5a1f7-a1fc-40a5-b905-c57be107cfb3.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 0x4d6234de77b019feed847901e6305ea202c0bc16e9764165f98d52a51060cbca. 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/TLVEM2461482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd640bfff27d772fb6a22c408e6f9ece6e2e9304a5b69a753d27d328518635e1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/CAF5R2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe98684b818faf689c2bbc7042ba569d5107c60fa6317992b6087e649d1aa1c69. 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/QZWV32381777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f47fd34706b3ad7303e9a1389dde1b633cff5cfb9dfe91de58493bcb522b672. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZTB32310096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1905f70a8736d0373c51dfef42dc476fb99609376dc1c92b72afae65243af. 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/USLZJ2368044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d67cbf54ff31d64ce821739266a625d51382220462328e39523519bd95285e5. 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/QZTRX2225432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad7ec79021d253ae28043f7286c992b2d43ac2178dbb3aeb4077a0fa385231bc. 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/UK6821902365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba80cf23fe1474c1e8cfc1b1d8971a7eeca245b5bc4e6a256c22226d20716295. 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/GB8KE1757693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97697351de4d4e372324ff0e2fc982630c7c93fbe1c9a713d8bd19bb92107f4c. 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/USLZJ1794559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cdaa9d79e3244e33d9a4e89524edf61c91551c35d50e5b99f199fbab0fa81aa. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USLZJ1655722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad07ab7d0c7821d2a8c1699a636c85f44c12301e3b10977baf685fafa403d518. 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/QZDA82077586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cf0b77623432805fe9396f8d91b6509b3336491d1ea4cdb3f9321287ce86be. 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/CA6D22400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd640bfff27d772fb6a22c408e6f9ece6e2e9304a5b69a753d27d328518635e1. 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/CAF5R2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916b1dd23c007ffd3e23d7594bd7adb37fbe0e674f99cd82dbefc2fff4527610. 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/UK6821653552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48ff345a1d73bdf15ca1c9519ab7dbcb21affdc46e0741cdb64c9ec26ca85e37. 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/GBS5E1100240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6592130a383c354359e07605077a40caa5473c578d3e8ffc1f94d8a12480bd60. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-21T17:12:12Z), 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/UK6821634170.