thumb|upright=1.35|Many organisms, including aspen trees, reproduce by cloning, often creating large groups of organisms with the same DNA. One example depicted here is quaking aspen. Cloning is the
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 0x63d97a5ac7c5cd93448374836463698087e1d76886320842478f2250514fc17b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ca400047-0852-46a4-99f4-5d7f2e35da7e.json and https://artists.proofprofile.net/proofs/artist/ca400047-0852-46a4-99f4-5d7f2e35da7e.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 0x83bba258daf4dc09cb0b05e4ab5136ccd4d62d2cb15919da6b9d43aab1255877. 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/AUOJX1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5548d7d41fc9e9849a640e83ba4e4dc2d9fd8b592a6bd49b7cd34ab013f133. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/AUBEC2058116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e04b72f8242c7a0de959a8cbb4ccb443d0cdd55c924c9c26540af9b84659d7. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZMEP2110565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa78f3d62b355636999738d96518731cd073df1cd8a6ed303a40a18ddef4d71. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZNWR2121624.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83bba258daf4dc09cb0b05e4ab5136ccd4d62d2cb15919da6b9d43aab1255877. 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/AUOJX1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdccc7d89423ef7ecb94ea4bee6894c7fa39b8b36a2457567db3179a0ef18ad54. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZFZ32265588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ad77681abad8c928994a37461efe2b75b5600c196800ee792c04879fff51fa. 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/USHM82313435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f54b803f3a048385bd3974ba9a720574ac38629cf4b7609a9e447a994505e6. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/USHM22419880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b57809dbf466b0c341636d4457d4af3e247908cc09706fc65195b58f2166b. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/AUGBT2446887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28291cab0375ad6d36f5596fa03131a5f1868cc8bbd1dfea46ba3a1b362e2f65. 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/AUMEV2499494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8190e75f364966cb8ab0369fc2dc8517fb29edb74f9182116c455480b2ba998e. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/AUGBT2474363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b255aa95b5fc074bffad00336f09571983022f05798b71979f50f4b9866b61. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/USCGH2437360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f8b57809dbf466b0c341636d4457d4af3e247908cc09706fc65195b58f2166b. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/AUGBT2446887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56f54b803f3a048385bd3974ba9a720574ac38629cf4b7609a9e447a994505e6. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM22419880.