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 0x6dbd09a62fec081b8bfdfce1f90e8e99f5689b88d81c00808babfaed993f4205. 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/6af30f72-11ff-4a4f-b5de-e8f4c8a00a4e.json and https://artists.proofprofile.net/proofs/artist/6af30f72-11ff-4a4f-b5de-e8f4c8a00a4e.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 0xe516afc6f8f44c3b277be2702e5331ac2f27e054fe86f7541ad519d3dfb57743. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZNMU2013978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b289c8afe83106ba9ef5b3f5322b36f8b677ecea150e7819978eb26ed0cde7a. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZNMV2008379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45812c16f0b789e138ecd364478460424f81722ac2731c682448f172fef36af9. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:35:16Z), 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/QZNMV2008380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1148a427af9d3b2fe62d4a55dbe0cd292c774660e2afdac624652b5d24f9c8d5. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMV2008385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf21fbf6aaa15dea66b9252932b7577be7754ac3a5cd49f4a0c5e3d9eff0d4f7c. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:32:48Z), 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/QZMEV2227493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8403054ee15570dd59f8e532ee5854d376f83345b7d9a4bb7ec9a9c64003212. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNMW2279788.
Put Your Hands Where My Eyes Could See (Remix Freestyle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf36af4ad8867d3e4918e802758db491df6e5855e50d067ff7fa06dd773f77fc. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZNMW2416970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f791c75ff68f1b0ac61369d0e7eb0c457b413a14238135525e3a167b0787be. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZNMW2416972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d8ac6bd0236fdcf8083250123c2232b19f5c2ca371a64406faf853f2331cc72. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNMW2416976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x461c003b96552f0947a1950fec5884e01df3c6b6a54a09e865240209c720b1a2. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNMW2416980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x118da64b6d32f4922079d6f1a8dc25b6310e6ed4b865e2221b44463ca5ee601a. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:48:15Z), 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/QZNMW2416982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4579bb78a31d4a2e9812fd0d81099bcfb7df0b30c1fa72b3d0fa1cb8cb83284a. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNB82536717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8476b94541ac5bff2b8c3835f0d59ef2a23cc4cfd25a3e1d5f0f05848a564009. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/QZNMW2571049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd809bac97751dedd77825c183ae6114d01d495b8e04246685316f7ce5d61839c. 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/QZFZ22316842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae6b58a9012ef0cfd609500a3c72994b33f42839a72ba08d8ae03cef1a85520. 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/QZNWZ2259484.
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 0xcd19bcee4a3b3b2eef6ef9fc57bed2881d06330024ba3ed13580a5b31d419208. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZK6K2244415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8676865470c22a496c882d6328456b22e2ba2400209f160682ebd7f5b804e57a. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZK6Q2250829.