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 0x153a96cceb736906920edf918049ec273170577b587d27d7085dadd7916f806c. 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/7e52c2d4-1eb1-4ecd-9f03-4e23af78719a.json and https://artists.proofprofile.net/proofs/artist/7e52c2d4-1eb1-4ecd-9f03-4e23af78719a.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 0x97eb80f4d7671304e5bb840fd28421f23ac9bef9e0b19104ee2bdd5bdd7f65bc. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZHN82154228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81c5879e71daec63f1a30ef9e1d4bb9806d9850532f942c25b30057b65df2a3. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:09:25Z), 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/QZMEN2103315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x330725b936333800ab8174fc780713a0f094d1be136f88895a5c5bfd9549cbf8. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:02:36Z), 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/QZNWS2102039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bbbcc5f89f0086d4e20d83a62a40718066b1a42660861da5b5f0f38a9ebb6c. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:29:41Z), 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/QZTBA2225666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2b24e7d259d6be0ee515036394cc0e2a9ed7d2f61b157832624968ed6aa778. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNWQ2357254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2b24e7d259d6be0ee515036394cc0e2a9ed7d2f61b157832624968ed6aa778. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QZNWQ2357254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa63d391185b79ffcd7647a0454f90d8b4e91c9763e509211c0809dc989c78b. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T10:54:12Z), 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/QZNWQ2394606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92e2dee5f3bff963ff3189be2c7f3dee17682a3652cfc3d7901bd9127649b1c. 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/QZNWQ2394611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a676e3bcf34a1bdd69cc2ec1698717458946f80c570040122698b8d28c9a7ca. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZK6M2428227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b544d7236bc74abeeb343a5a0ed760b4720e8e2840b6c10adffec2f56cef76. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZTBE2402066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcf4b9e72cb430b560dd158c7085b005f52088b8c041f2dd6b73f17a4b21dc0. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T13:52:10Z), 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/QZWFM2498369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bcf4b9e72cb430b560dd158c7085b005f52088b8c041f2dd6b73f17a4b21dc0. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFM2498369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd0033fb05dba6a0fab994e9daa19cd667d6b036a1f1c74ff151d17fcea1d8. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZK6M2428226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a676e3bcf34a1bdd69cc2ec1698717458946f80c570040122698b8d28c9a7ca. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T07:20:29Z), 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/QZK6M2428227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43b544d7236bc74abeeb343a5a0ed760b4720e8e2840b6c10adffec2f56cef76. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:11:36Z), 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/QZTBE2402066.