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 0xbddb5824d5617f9fd95783a1293cc70472edc40c700d3e5c262e15e673d734e1. 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/3601e1d0-de82-437a-8ceb-7cfb6fde405c.json and https://artists.proofprofile.net/proofs/artist/3601e1d0-de82-437a-8ceb-7cfb6fde405c.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 0x8a5a26dbbdf91c8818357b166d9ba8914f989ff3f4413840057d09182046b45f. 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/FRPGB2426690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70a8cab50c8b781522d418b908f01fccb10c0e4101678de6e3317c85afca4f6f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/FRPGB2426800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c4765aaebfc3a74d7bb50fea80e862e56fbe1e8c9a2773b2e9c3949003540f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/FRPGB2324390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe297732834a9c2701a7f0968e0ee5f77c8a04ddbae5f266e264f3299a499786d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/FRPGB2219030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce32601c01ab866866d05c54c29799f0f58ddc2fdf7784b7000d5a33b4bc42f7. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/FRPGB2218260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e6a6e491ccb64b2534fd796515089a2db5d74d200c451cc37cd1dafcfeaeba. 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/DGA0L2310541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x023affc8c4843fd9afc6e2fd1ee181a4829b0fa7f5a69af73d5214b3ba00c641. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/FRPGB2323400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c944f699db878803d634e28734b91c740960feac61a6d74bde345e5d26eb779. 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/FRPGB2323480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290dee2ce9aed642693687a89482a84d259948eaee02d5205593b049cf1194b4. 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/FRPGB2323490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5427adc4cfa1eaae06ba4569d55fb742a606248cabac03cf2429b5ea4ef81fe. 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/FR59R2014169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363b8d83cb601d992bd4bcedbe77d553c1cd3bdad367ae8d150b92e667cc77b. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/FRPGB2426780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f54fe5002e3476e7488485282f7010873018218104a4f75b2bbd2b0365f689. 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/FRPGB2321080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132b4ed94faf0445c8a595941c7610a0e46b530681e6dd5688f0466980985845. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/FRPGB2426680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a5a26dbbdf91c8818357b166d9ba8914f989ff3f4413840057d09182046b45f. 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/FRPGB2426690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312e74e8857bbb62005cdd369d60012812ced65918015be4c6db33482bd9c1fc. 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/FRPGB2426750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8363b8d83cb601d992bd4bcedbe77d553c1cd3bdad367ae8d150b92e667cc77b. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/FRPGB2426780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadedc7ebce031a151849bb0697c017f5a3d939d4d6e26cfec55598fad3ed739f. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/FRPGB2426720.