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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 0x321eeff8bd3db120e66429dd2fb9053ee94fd4d1399028eb3c0dfe2b1b22ac11. 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/35b8c5d3-c019-4d9a-b6f7-df065c1fa777.json and https://artists.proofprofile.net/proofs/artist/35b8c5d3-c019-4d9a-b6f7-df065c1fa777.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 0x310f262f9ec4b00488c6791a4491d20efc58669a3cf957134fa912c44d13e042. 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/TCACH1523379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x799148198a6cf4b7d9b6973abfa0569b1bd33e58a9d80d243e5f1a182d087e7d. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/TCACH1523380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4c817a3c68b8b9071324c3d3ce57675882e55651fbb2b98e242380b14fb098. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCACH1523382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4feffcaccae96391e883ee843dfc2ec5f10f75b61e211e1d8eb4bacaf3ae0c2c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACH1523383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2051b3090b74cfeb5ada88fbc722c0746d4ec61a610b1b74a40d4aedbbdad0. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACH1508269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe689bbcd30ee10945545f7c4b7781946935886d6f7a5c955b12168f3cbeed46f. 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/TCADG1727577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c6762c23f62799ec1d8fc3c546a1e6832996c2710bda25060af811f61caf80. 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/TCADW1871889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf119a04680e67e33af3257e3fc100f1bb93853696d5968ec70110b0103673468. 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/TCAEL1970631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99f3b16b7b7f815cb8f415051a43d1479475494479a35403ce04eba384d49cda. 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/TCAEL1970636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ebc3c4188ecdacadee80c003fe4aaa608407999c9f421d945c54e4cdb7616b9. Chain 2 (Bitcoin): anchored in block 958585 (2026-07-18T17:05:16Z), 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/TCAEL1970648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1af670accc41c6ad85b1ff78dc0351fcdae5c9aa2a8eaba138055ab8a65b299. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/TCAEL1970650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02c5497f66648f6fbb391b5f549ff20c403c332f2d2befbdfc3a097f7cf961c6. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/TCAEL1970656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72be15644a0857bc5fbff568334d474f774034fcb4169307d8acfa14a4659a8d. 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/TCAEL1970658.
Yume O Miru (Theme from "Samurai Unicorn")
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44effa588b8cf1d16963150e89d89763e5d775286939017b56a33267b0cae792. 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/QZWFR2423796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e6a9d0f6a38395cffc96967c133feba04da2a694ee617bf8b1cbe4ee5c92d. 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/QZZ7N2461464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79111560c2208169ff95802e3e5b69f75c3500bf80b34c3d3d009346f97b2c0b. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZZ7N2461466.