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 0x0fb95664f8e8d9812aab373a633dd2e508a136b08f4be32f8176a443c9680e24. Chain 2 (Bitcoin): anchored in block 954705 (2026-06-21T13:42:37Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/eea298c5-cac3-4922-9571-53f8d9eb1fe5.json and https://artists.proofprofile.net/proofs/artist/eea298c5-cac3-4922-9571-53f8d9eb1fe5.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 0xde06b2d8d5474410f1d4d084d45472ae46d7ad060b291485be9084397061cf96. 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/CH6542420143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead71cc2a8e907aab60e7038a6f151ae311927ac3c3d7f2c33e4cb0e0c2cd442. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/CH6542420145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b93e3a5b0c16429b4465ce1427261ead7626e69a60456de12953c3d20229f3. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEZP82100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e962f24ad52e45a5dd9a1b9351e5936cc0082e49f177a2391a4bfaf8085edaf. 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/CH6542420142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478344615d6fbd2539a4896557b2bee0262654c510ada9c5bb1ca2a7749ccc12. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CH6542420147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93b70b3797445f622e94bc472f288373cf7b1cd90d2c838c841de063f6c47e5b. 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/CH6542420150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809f609536df197d868802e57f305f060f52cf253dcf3ecae048280500a7c991. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH6542420146.
Les Pas (From "Der Junge, Dem Die Welt Gehört")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff260efd4d5414b8f0668732188019a8bf168d83fd3bc4778dc9941d3aa6420. 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/TCAHK2368175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fcc5db3db86d9e4153c0caf8e8d62bb5964880a2c767cd5d5756693d3abe106. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/CH6542420148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x469b823fb658efc668517bea8c90a011b72ea18a0933a50fafbb15c818a1edfe. 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/CH6542420149.
Je Dis Oui (From "Der Junge, Dem Die Welt Gehört")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b8be246cf4f986122d113dc9d2e04ef70327bac6789185c96c44e34263321. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/TCAHK2368176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6427dc65331e5ac7009720a3da3efbaca837bad595e730f8ca95a31d155fc90a. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CH6542420152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce3dc15bf65c2131dee0ba24bf1835e676ed4fd3de0dcf1953764a03ad200068. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6542420154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46dcc7f850b04fc3dcc5d1737d7ee514172fc02411e4d0353d2e73801ff9f063. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCABR1320093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5022662ea11fc7bb073b3b27df1499208f648195ce812f750a24a94f8114a22. 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/CH6542420151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa9ab1e677d243d760c4706b08a470d7045db49a499df5813158923f89d1bc. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CH6542420153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217b26ad91b30e7e2935c0dc0a3e18dbf17c54fbd59cc35877fcab4149f72702. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/CH6542420155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ff64f2f584733ba8ed3a048eae91a669b64a688f297c1278729eda07501c88. 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/CH6542420156.