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 0x3a84e1ce9dbd85b66332ab64682712bea1e2e314fbcc1a8fdb80f8eec8cd3fb2. 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/e13f38d1-7b46-40cb-93d4-dcf95264de82.json and https://artists.proofprofile.net/proofs/artist/e13f38d1-7b46-40cb-93d4-dcf95264de82.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 0x7ffe472c412ca441618631902893e7fc3fd4d77f4987858bda455547d609dc92. 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/QT2VB2491760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c7798be26b25d1f2ad07db667db38b58ad8ca1774ec488a5630fd2013dc77fc. 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/TCAIU2432882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11e295bf694b07aa23fb581ab1e79583e3141a93ae9a2480306e1e2f150e65f1. 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/TCAIM2497681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e1378ccff8e6e26af5c5bc645b18f4eaec59fc74441e4207f2fef7278f61f. 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/TCAIB2420444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88ee669863214131ad2dae1b2513e236a70e595213a58d6bd8419cffc9fefb. 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/SE6HN2403374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0e1378ccff8e6e26af5c5bc645b18f4eaec59fc74441e4207f2fef7278f61f. 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/TCAIB2420444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3af2640e10076bc2d55e2e4608d26ba7c9f39737b774c6d66dae3ba6122e5b7. 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/TCAGO2247819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384dfc8d0a9c5442ec0d1b6246e6b0fcd5af682e9f66ce262e3d616e1b68d543. 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/TCAGM2244302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57a580f9ed78f58a2bd8ae09b5adec816f14b54c0d9713edfc3de0aa906ad9dd. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/TCAGI2252773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb28c8eef324887d5937ff70fa48483871f1d348e1639be94a97b63e12f6bb. Chain 2 (Bitcoin): anchored in block 956862 (2026-07-06T02:10:22Z), 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/TCAGF2252514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddfb28c8eef324887d5937ff70fa48483871f1d348e1639be94a97b63e12f6bb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAGF2252514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d323a5a3262bb16f00750aaff66ef69309ccc641e4166f56a3de58d5e096da0. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/SE6HN2466069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb4fbe5eba62c113fa449830bfd7586443c5e8f4899f1e05014329d31f483f42. 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/SE6A92303606.