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 0xfae91c53b86f39d53f83a172927ab5b7e1c73816e4d115ff35582ad3ec5e0946. 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/48abac91-0e46-4b8a-a399-100d5cf3157d.json and https://artists.proofprofile.net/proofs/artist/48abac91-0e46-4b8a-a399-100d5cf3157d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x618f52e87816399186dac019324d43b54d6c4cd2cd40793dc77ca74f22bb3059. 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/QZTV32407899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa56e97cd3d74b84ffd5beb9576d863802b2d7b6a4524c426c63ab08e84f08a52. 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/QZTV32407990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56ddeda351de025a36211838e084b74fbe117388ba79fb06ecff733de337b853. 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/QZTV32408027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b1d41d7cb99862db26278102022db3888bc42e17d64f87440eb1e834078b51. 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/QZTV32408045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9797e69250a82c27de206485f665215dc813818185a773d5488d2f6ab54c1c. 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/QZTV32408059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f149ca82b71ff5f852b2ef8ccec73cb6bc8310cc615894cdf5d23e976fe3e0. 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/QZTV32408177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3529618e130af1a8b6c3e2d8aca65450b32e98923ef7fc07430089dd73cdf91. 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/QZTV32408207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66a904ca2934080474230eaa735ff59cfadaf03c728dd444cd727b61479ccae7. 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/QZTV32408286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fa972765c7cfa763e7654ec5fe2a945cc5761422f53d20bb40dfc4b86f5d76. 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/QZTV32408463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a451eae4a69b262bb590357fed7c781eae62b35b42cf0973e05785267d4bca. 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/QZTV32408562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x836d57717730c20515d6d4db5db5b4e9ae7fb1128c21fbdd65ca8c89c5fbddec. 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/QZTV32409171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe664c7e6dd9b65c8cf4ca2fe81e2285de3f6480bd5750075b641bfc510b45. 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/QZTV32407863.
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 0x9df04ea61cebaeb19acfe8023f2073f55e6a4b90d98af4d60f2dd955f54014b6. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTV32407906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0fde9793f3130801180bfb78adc5d7e7576264331d33213e88916db89b217d0. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZTV32407918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e71360fc99e473289518d12f5f67db84e38c27a2a258de166984d6ee3f3342. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZTV32407951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8683e5b094dfcf489df59d37533f2f0bee20a32d60e0cfbb71e0feced732519. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QZTV32408037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1a7d26055bef8e9bf10a6f31126553acb02075508bb0995df14f6c32f9ef8f. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/QZTV32408078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06b3411edefb88d3f1c172c4e04e3fa2398bebc65f5d617b974d1d55e80fcc38. 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/QZTV32408141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51f2024d390bb1467eadee6d9ae899cd21ce370af4c10d44d1f08418b0c1e358. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/QZTV32408247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fe8fa8184573f70fcaeeb5930e7fcd0df5c3fd47751dba1047f1c220cbf8d46. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZTV32408319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc227cb0780b6dccb4c1c0bbca4f037de003d585783c57ef8763e68a79ecd83. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZTV32408494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12c71ca7c8ef0ffc0be5fba16722ab27d55060d3d15643d7d93df27cc45cba6c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/QZTV32408596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c9fa5ce269c780828e4de6556071dcd46cec2072ebc52d97da3813acf2ebda. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/QZTV32408614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2d264f0aa2379fcb493dbc392ebee2de5665cbed14c96a4196127aa178deca. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZTV32408655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2640a838b212eb01bd33c57cd79df3a95df7f79873fe9a52cb0154161254ce. 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/QZTV32408677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3bf2fcc640da8e6b9eb1ef0a0ceb8a1d7519643d80b0463a313fe095ffe195. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZTV32409112.