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 0x14731f51feb39bdcaa8f647976e8beb5f9f62e087d769525cb145341bdaab0ce. 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/ff01b9db-3f65-4a66-a85c-b36d2e671a25.json and https://artists.proofprofile.net/proofs/artist/ff01b9db-3f65-4a66-a85c-b36d2e671a25.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 0x42caa3f1ee920dc902245ad7af3191446b57b31290b7bfe5687ec3db0cf3601a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/NLRD52259879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa88ed445c3b02f7f0ed2ae1a7fb73d46275805c33a850f08e8942f109113f259. 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/NLRD52259880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78bad661dd19ab6676656d432b11e28c854230cb2024274a1342178b53ad3092. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/NLRD52259884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5511bd3bf3dc2a022c45eb7f3abec20735b37456a8e90e55de69e1323ee03d8. Chain 2 (Bitcoin): anchored in block 959073 (2026-07-21T23:25:37Z), 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/NLRD52259885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38e7d5afc1df5a5f15f7c43d303a6607622a4ef8f7736f32ea7e37b52e39bd7. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLRD52259886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc709705852e97fd7696042ae51ec1700eb0925e50be0caa05459dbf6bda30719. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/NLRD52259887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5277734639762f81e630d3d4bb2e903ca34dfd45a85d2b42d80b40071a7cbfd8. 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/NLRD52259897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370e7422b33f950cc1476596f3dc99816f664afa3fbc553fbce1056c079ce082. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/NLRD52259900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ee51e8237a78580f7a9e8a17e834f39bbc0a5eddc5ddb394396d72a58499892. 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/NLRD52259903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4559a4ab413dade3bce2172343af146a0cf6506758986306c277bff1510cc934. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/NLRD52259905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ccef559867a742ad811512bd53ac8d1deb250206b1788c65c1e144ed48ce77. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEVP22200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf67bbe23e30d78c2f98a51e96c2dba694482a8f1d39c0b157079bb4c94723b76. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PEVP22200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa567514ec9fd07196aaa435d2c1e0874a34e1f7795260ae5eb8837da6a9827e0. 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/PEVP22200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b369f3bf9f90e85f732e1ea53606e570fc00e66e9250228a2c6d8ef000cf754. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/PEVP22200023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x239d534699d75e8eb5e8304f555c11c3b9dee2e43b373af15ed8e03f032bdc7d. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/PEVP22200024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27d86bf8b8f8d19db617992ffd4b9e27af93007815c773e251052fd34486401. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/PEVP22200026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef1cf630b979f33fbfd54e95baa4c4a21174a7c78a97f2583e543dd3e2aa4bd. Chain 2 (Bitcoin): anchored in block 958670 (2026-07-19T05:26:23Z), 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/PEVP22200028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7c30c0b3853c09e8cb3b207b860ad47f7ac4fb30bcd945552649e972934891b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/PEVP22200029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80b2beeac57d6c958b32bb6cfd3d92e50dbb25e4f4c517e1eae965b5b2757d3c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEVP22200030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba374bc703848e104282b2da25bafce7f0ed5587a74bb78ffe144b6dc7db6ac. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/PEVP22200032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9417c2cb3107b7b7af460f8f925911281c5adcaf4ecbb9ad58e1f454397a2265. 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/PEVP22200034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21369db4474962c9bfc0062457a34c1e7e464276d7448fdb910c88482faf26ec. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/PEVP22200035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf928dfa47fbb131d856b7e8e468ebd3ea5d33912afc2d258721396d7a73c900d. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/PEVP22200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x741cbb9870123a5eac5c031ab3eac02032c984031983efc035e22552f607ebd9. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PEVP22200038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc20e5a269b7b1591759ca4e1194261731e8fee93b41cc852b3f9ffac439807. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/PEVP22300055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd284a30c113823406919ba8c905061634a193498bf0fe0eadecbdc71d032f78d. 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/PEVP22300052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a07668be57541154962d01f791fdad30ebc1a42d58c19333b9726d13cfb4a9e. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PEVP22300054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec26b5ffa94e5c36b4176135e9d36d378c176fbf2a8dc273a0829f0814ff5d01. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/PEVP22300051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8b875c19b583f8a79515087e9e83c6cda76d48a64b39fe994e960d7872912a7. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/PEVP22300058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27bb76a70a6e86edc9fc99c685e9f768e90933ce74ea64e337fc9f7dc7a573. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/PEVP22300057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188f7843bbabf1c397f53bf69fa317a45803d03af4acd580ae3f813155545a4a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/PEVP22300056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe71b1453dd4309446386406cdd5646e1ea7f42c0ddbf05b677bdee72e968a8ef. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/PEVP22300053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x082ce76fcd11d3a1f0ffc6e99d65cd065b1712345277eb0950aadfda9b873e11. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/PEVP22300117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef6714381ab6a3c599db76b3d6590d478ecb2f7d80e5ce9ba7f2a04c1dd00969. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/PEVP22300124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb666ce74f15f8883d7bdaab149873f3b907c206383d3c5a68a45b0aa5c928e4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PEVP22300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc346cbcad9051c4f674b55f798930b6c88db4999ad84f105e7f47ba03e3bac7e. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/PEVP22300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9ee64834374f87d86db469a87bcb76060d93e8578a3b8222c97a2fc44dde436. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZYFZ2463568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf30ae793fcf393e36cf0b7e42b23a6a965cf61efa93edd11a960d67baa1c4731. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZN882506764.