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 0x41e407f3b9249f8adbbf5c702faba9ede78c0cef634a2d81495f5d7862b49384. 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/ad1ae47a-e921-4a08-99d3-3d83eabac916.json and https://artists.proofprofile.net/proofs/artist/ad1ae47a-e921-4a08-99d3-3d83eabac916.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 0xe03611196e8220ca359572c507391a5790b0888ca4c4a774d15d62a1ba1a73fa. 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/QZRP42480521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa438b57e7cacb92f6424d47474b107c8aa01f5f62af2c1a7ccb2378ad12697dc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWT2420419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf61e6495457a944dacd9a0e4271d27016421ea7caa3f5b4f7e969a50a278f581. 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/AUMEV2454246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7ad3b8010dc9932f55dec34c0d10e7bbbbbbabb675e15269506a1e1284c76bb. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHN72488789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0ef1d39eaceb9a11a23073a7f05b02e9a94c0e7088497e806c599817ee53fd5. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AUMEV2438271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785f797a6c2fd97e413f461a7722cc17c1783fc032402deccf9e4903e3a8eee2. 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/QZES62450383.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dbd7896e8fcef83bf7aac1bd4dfb6564a03a0efc566955beea7c8b4d8143e86. 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/QZFZ42476700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7339fdb3a80262d7251a62bb5edf3026de2aa41d5267ab6466d508a5deab4445. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTBA2398352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e4ac0989db979e65edf2bd6994794296a2b0ad57f5c543ff8916bc21ed9e797. 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/QZTBA2398354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6307f178f390334958ddc7f88fd1e0917f1af65871082c8e0edcafa99df8c5a. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZTBA2398351.
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 0x605fec187cb0525cb5ff02df8ad04801267a47ec508af434d7cded25f5007f25. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QZTBA2398353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6a65145173794430f1a68c3a922274be7f16ae0d58304de5bee2339233b8387. 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/QZTB72378540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3769dd428247e0d7fd7c8eb90bef91084b869bc8dac079e62a97e2b67ee2f03f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTAT2382375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06078b76b54aca7decee15874a34bc4dddcb07638afde0ea92e5d31cab05bb5b. 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/QZNWU2357149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1eb57280ae65c2f8e2b8d5626e3159ae3cf9b51a987c7e32e7a97179551fb92c. 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/QZNWX2355688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88cc1d97f46744ce125a419c41054174f99ed2102460d70cf0bc9400a58113de. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/QZK6N2391788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9882a2818ee7c2995bc7f22cdbbf591eefd548af365dae2006aaa06a37475de0. 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/QZK6P2309764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x255eed70b20a15495678181b3e3afe4018f671889f20164817d4c7c7fb60b033. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZVEM2313275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2de2c45ffe80a0ffc8092cf8a54c099011b4d6555e6b15831857939996ac4e15. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHN52305605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2692ccf63126abafc3d7958e9edd45f6633507085f49ce24602046118abc20. 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/QZFZ42310529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2040dfb7b8308154374cbfb4e59e771186d708e5a7a65288be11fb5b8c629946. 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/QZFZ32362149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2edba247011d36a825a33b2ea83df6a596f7f609dcd3f84d6cb8ecdd9c5ff0f7. 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/QZFYY2373882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a5db67bf8e140321e8699c31fbb20241742b104b27743a37d4225928fb94e56. 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/QZTB72243538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc35a5ccea829cacf2c69d755c56a057ad34cafcca7bdf0fd7a28491fb18f1b29. 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/QZTB32277050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0615217dc2ecbc7d38f7e947f20648d406dfe86339ee81d855dc3d9f25dac0d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZTB22287141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfa94a874973be21357635b0da289a58d3e65ff152e2a6a41b9fbe1cf37da7f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZPLS2284106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d8177d4d7bca2cc653900cd9a216ca804173b1cd63433b3124b8e9dfd36782. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZPLR2293131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf725da295ecf08664b08448e2fefcaac32e83ea1f2f7234ca2301c14a3763461. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNWW2242950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf30ea9663d878214443ff685e5b7e35e80028883b1c7ac46611336375881e26. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QM6N22286410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afec68ebdd0d71905fa92de780994eb0859690d02772b690f3d812d9610ac6d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNWT2266790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b1907b162a2f826e7c89fdd7a6e3aca6f9a30bf5daeeb8ba70333319b0917d. 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/QZWFE2443099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x602694632bc8becf2886859586cf1ca10c6876a40a7da23c3fe674c008d418c0. 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/QZWFN2457995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bfb56d0557d3c133db28ce2bd647d48e302ac7bc33ed61d51acf4a239a691df. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZFZ42581597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc852b4b2a09e844f6095550d5e05ed85d0686be33c17c893a56c4390c2ec69f6. 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/QZFZ42581598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867caef16a50990fc5032d8c3394ac228d844cad2c7f1cc6dfa391e96510006a. 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/QZZ792447098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1977f0e3fdc7f5cdf8ac4bd44025d032a27825e480299b917caeb7585696d2f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZWFM2422399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec688e2807e4fabdc54435c2f8c2cfe67bf8a7ba037e30c603d5e2019ffd9fa9. 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/QM7282408578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e1d5126e6fc10b88bfa565a482e141a3701eb6551cea9f2ce1efb5e543dbf40. 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/QZTBC2455236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3888935e43f3bc845aaa68884e598c20ea4b372935559c0e8cf5b5c0deb6cbc1. 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/QZK6P2273103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe51575cbb409f65a509b76978ce5e24603d0ac95d54e67c1408eb50855e6cbd7. 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/QZMER2170273.