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 0x8a39a06e27f331b04afe81176b570f46d2f25f75510339b05dee8a7fff659538. 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/c950bfd5-c980-4ba7-bade-b6aca5366ac0.json and https://artists.proofprofile.net/proofs/artist/c950bfd5-c980-4ba7-bade-b6aca5366ac0.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 0xf92b2f644c8b66a4de786d5d002e73a2d14ae10f183b44cb9d1b5b66a22a09c3. 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/SE6QE2074058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cc632236a6de8e2d7361362b60f65f63b2482350c2fc936c32a1a26a9895b06. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USANG2130964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6112af280548f8b9dc0a0b1ee3e98af2c0e57d87e3b4ea85f5b77d4a29c6a5b5. 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/QZDA42113197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72392eefa3054c7c6a44b54e98ec3a43aaa4aee2c76248692bfe5de351034824. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:31:51Z), 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/NLT2H2100309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x257681b6d3bf5d76f26e8c5c93bc38096493d7633207247e7337bcb1a0b788e7. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QM3DF2113800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7650964054b824ac219e2793f5a46e45809ba155bbcb551da00b7b455b3bc3de. 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/QM3DF2141214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1bd305168587488dafbbbe8fe4ae2f6c13f7cdcb03462b51da4ff527e4ca3a9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T02:04:01Z), 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/QM3DF2156913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6f576735d150600e957064e08ee3d2ef52ee0a88df1c460124d60f4fa9adfb1. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-20T00:09:45Z), 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/NLT2H2100943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b27237da9c4c7fd8506b4ec00757e4e53a8a37b3b2ece06d9684386c44c3aaf. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:57:30Z), 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/US3DF2248455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b1e555471d0788a444a5fe6ea36095c49fa709af216df0c2fb62829f1f0e86. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:01:46Z), 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/US3DF2254174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f1c17cd86487f3c716efa4bfd95f20001a04b0d9d29a0faeb694c38c01a5d2. 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/US3DF2274322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc61ba34c24e5d7015b17df4fa4f6a74bbcb3043bafa7c8f0f19c7c95dcca5227. 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/USANG2245118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c817b2c016e05bd2a8528eb449806b6ace38257995ed49aaf3b599b9536a714. 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/USANG2277520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x428fb6abd521aa27e57da7e78b932d00360ffa61160ec0570d75d46df7d9471b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NL4YD2200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bb728ca58045e3fdf608e3e45236ff27322874346efc5cc289d31c230fb56c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/US3DF2151758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27967760d467438d945d7b8aa56eca4a46f48e00e834724849861af56f6df995. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/ATUM42100189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaca38aae02028068a50f240d7d89d50207b122bb0d0f09faa1b0833afd140bda. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US3DF2170112.
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 0xe35bf564d88ffcea2b2fc6d867af06e911df6720943cb0a4b1418bb4350b8884. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QM3DF2175205.