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 0xc89f2d7b0dd983f4d742961e76e64bae0347c403b6d651da027c0449a9dcfdd5. 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/cafd9016-7947-4792-b84c-4cd002b3a8d9.json and https://artists.proofprofile.net/proofs/artist/cafd9016-7947-4792-b84c-4cd002b3a8d9.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 0x899fa8ea1e3d3b2989cb43c0e0f7fc674bf6537fc9e3684f7c6b68d013ad07b2. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZNWR2222214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82017a3ce4c1ddd0b25e3e8a9b04b88df5c9093b192ff36aca850d9d5d101010. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2222215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb99371e1f129c55b12ebffca0f3a15d192eac8e238c42ba5829cd941ccd8a8. 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/QZNWR2222216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32791896d1588c3c977584771f2f656a105d23f83aa73426ad02000ff00a6597. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNWR2222217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e9cb40376242bc10dea260e696453bc5da584d27ef7643a8efa0c19decb950d. 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/QZK6F2237738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba2a7c62c46c0bd2d737f6642bab603057cc07e30883eeb896b5a1234ead95c5. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWR2222218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1288af0eccd4c8b8ab2832e60f6669bce1f3f73db421542119fb95a836d6a4d. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/QZNWR2222219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf08840205db604f59976886a21720f019cd6bca468cc44acc1d4a39ded78b45e. 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/QZNWR2222220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b504956d4bad3ab5d8823af7d477572dcd2c7f0a49e403db055a5e627c57a12. 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/QZNWR2222221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e6a9afe25bcc31843b8ec5300b6222c2036622f27c4bc496aaf4b96b15793. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2318744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf126d6116c1ecbe25fc880f220ec162fd46f416cb81721e77b8706c46dd0a69b. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEQ2334180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6035c49cc49013de4667dbd11ae0fb3672507455e9aef4e3389e139cc529efd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZMEQ2334181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da4b3f982476b600490b0b2b752f0e16d1e3b4d1ef3144a0405b42cac983f56. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEQ2334182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49981e57ce1cd4868b5d63262045125d65369a4fc49d2e196c773e96b25795ce. 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/QZNWT2368499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x219e6a9afe25bcc31843b8ec5300b6222c2036622f27c4bc496aaf4b96b15793. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZK6H2318744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbebd3909f2d5f46a5626da4ef91ccd2f4cd8951c4ed78b8d5f4ef5243290c14. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNWT2368500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21fe1f13dd19db74c074eda8a1e1f31b6db14076f4dbc60fdeecab3ec8b5d6d6. 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/QZNWT2368501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4527c44c13cfccc30488fbef62936b1d8926543ec71f7013a0e470afc7da8320. 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/QZNWS2342230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7193da7afd1e12726b287fed81d2583a0de01ec11e09cbc9a5476a29cabd0525. 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/QZNWT2368502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7324379dc5e9aed576ffa9b8389ed108e436c4757d279ad2b816dfd48ef853. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL1042401721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1951feb9f2d28711d9dca58c3d405e82606a0bdab9ecc496a6f75e3e131db1e4. 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/IL1042403854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2d93646457de6195e1dbdd54a7d1e1c0cd647f3538b96806f2b4a31589d17be. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTB22215609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ae414662163e932a6102f1ca65522b4a99ec3bf83aae3621b98db28d9b0d43f. 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/QZTB22215617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1006c0dbc1390af1ee2af9490582ffbc4e860a142f45f7dac2c8d15fe697e97. 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/IL5842342911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc56c781b7305d93099d868db3830e63edca25a275c1bc1ea19d74d7bb7fe090. 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/QZFZ32462719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4a59436cc1e93b813bc8e344a4b11703b9e15c15260e63eb5fa13babf73da4. 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/QZK6P2371843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fc8ba3a70783288ddb0d279dff96f7ccfa7ed7dfe879134f7d0bcf2fa33b33. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZTAS2442654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5f660ab9628827013aaee053bb3e9c5903a1307e6bf90bf46bae028aa518ef. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL7532421551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebaab589b92e83677fa29173f310521928a0af91a310278169f8354814648d0b. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL6192000489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ece09edfe04f8ad625461c5a6d4ec3b697bf4bbbf8712d1a7ae2314934415c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/IL6192000496.