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 0x0f7c39f789133bb1575c7ea1200e7b80ba96d4054fbd9fcd9d78218000b43f23. 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/5673d1b0-79f9-4cee-b71b-f5db233aa895.json and https://artists.proofprofile.net/proofs/artist/5673d1b0-79f9-4cee-b71b-f5db233aa895.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 0xbc2b69b2d8bc01bbf156f8372a581c1b0720859682f382eba7f365e8bf2fb63e. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:43:41Z), 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/QZTAY2337297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf410ea8f4a5c11fd93215afab8c6802a8d4183b5cf4a26ebf31461a18e2d70b. 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/QZTAY2337302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80976e0c7dff222ef2313b7d559bc75632f2d2a4183bbba8ab64ffe57bfa18. 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/QZTAZ2343693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3520790179ea1e346a1cea37ef4578c186c631549f7d7c94e0852b7e647fa4. 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/QZTAZ2343694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85ca871238d72ff5c6877195756758b5594bed24368583d7073a6ebf27054274. 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/QZTAZ2343695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fc64f015bfb5cfb33232c4c7dbe29dd2e235af6d90f3f29357c718405243942. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:59:29Z), 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/QZTAZ2343696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c4808ab5dac8f58e06df5c68ca2cc1475b58cc164bd0708550a154e1d171e77. 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/AUGBT2237591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c453dad908797f94fdfe26c6060a51421eb8f2c1aa21ec6599b9159f508173b. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZHN72102996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2e584a5e12cf08594937b801576a800496fcea07ab34d263d024ee6914c792. 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/QZHN72102999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9debe026da91e756f5da1a09677fa026ea8c6ab8bbeb66120fdc9d32f8185d53. 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/QZNWS2085385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1996a2ab8cc22bafc905876f8397ee99a1cb8ac1168d72c9ea3d445db43bca0. 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/QZK6N1999887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9134e84d96d7c0639c5316e8810a7261aaa1a355418f59ebdfe71464e5fe3b00. 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/QZK6N1999889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04642cd61a6e760592bd80539b58a1d7262f7179cafaa59f5a2747e6863a99e9. 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/QZFYW1930242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ede99d3e20541ebc75d4692bdcb0f2b894f7148a15d69df3797ace5e87b3a5a. 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/QZDA51825319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x596a3f8ef53d5f46404ccb8cad72af789933160f8455bc13c2dfccb38531460b. 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/QZDA51825324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d121b460daa83cf2fb2c59ef7c4a0d8b9b83fc7c63b59cb8ae5b3207a562979. 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/QZ9Y21734655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe52d767a0f0638af2361cc0b1335d3d4ef9304794182027c3ebf38c12eff4087. 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/QZ9Y21734657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54a5553fe82091b275261055c3cd2d3d1cf9f8219014968e1e892ba32492239e. 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/QZFZ41958904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bdf2e1968f0e0010824e590dfc7dbabb31806dfb6a348b8b0abb2aaa776b7e. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZB4J1826069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e231bb1783b73f8f611cfcef6fb22c296216636b4792e8e2b126fef35ebdf1e. 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/TCADG1716646.