RAPTA (ruthenium arene PTA) is a class of experimental cancer drugs. They consist of a central ruthenium(II) atom complexed to an arene group, chlorides, and 1,3,5-triaza-7-phosphaadamantane (PTA) fo
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 0x6375e458d5020c7f4017dbb8dea2389292afc3b24aadb336b8c82aabeed7f728. 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/3107caa2-c455-405f-b844-bae1b28ca1d5.json and https://artists.proofprofile.net/proofs/artist/3107caa2-c455-405f-b844-bae1b28ca1d5.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 0x2e5093e8bff5dc33b16463ec8222ef63d36beee879d8f8a51cac5824bf73ed79. Chain 2 (Bitcoin): anchored in block 957876 (2026-07-13T16:00:32Z), 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/TCACU1618296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86d12b03ee27698ce113c2a55e9f7ba3289e1b286880ca9e81843439712c4809. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/TCADE1761128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9224f97e2f87c45891df26155a0a27001f1626d8b89a55d9eddbe11c24088c0b. 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/TCACS1685460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f35f89f33c5ed9ad1aae19f7e80362c9710ece702925179cb59c447d0514d9. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/TCADE1761169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2194d0f838b42eb6efdc084f72e2d92d24e094b04cf96302dae6d493ef3eb262. 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/GBKPL1962667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb0ceb6cdb65b5c4955c8df0368eb053f47f489b231a8af24f869eea61e8aa8d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/GBKPL2005598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8c4dd2d0debe7829e13a265a220aab73c234189f869d36ebe311cbf4726a582. 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/GBKPL2033698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c316281de10f04038efe438fbbf1b2ae00514cc0d883e1cfe338aa96ae73f1. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZNN22395003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba67bf76ea4426898230002c318e3a2a0ae0d966db6f7ec188e6542ef1d6b570. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZJG52562469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fabf97a92822e813abe1d886bedca7d843ff115f0d8c321e93f94deb09efeb. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZL382509130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d569c8a3d586a135ec15e2e42e83d979b4abc9cd553abbb05ecdbbe5b12ae2. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZL382584347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19ed961e042431f57a96009b26eeee014e27088e6ece50c62a30e16725d71065. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZMEV2527611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a3bbdc8d3c98efc57a3d401ec12cf02ca2acc108724f80a5f7cd4b5be9c1f1. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZNMT2585511.