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 0xffb8a1e52b2e19e076d6aca5131c2f0f42cc7d3c37acccd321989bfe92e3f4dc. Chain 2 (Bitcoin): anchored in block 953765 (2026-06-15T08:55:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb30d6f7-776b-496e-95c5-5289011c81ef.json and https://artists.proofprofile.net/proofs/artist/bb30d6f7-776b-496e-95c5-5289011c81ef.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 0x1f54cd5d8753cef8a8fa063fd6118284274a93f48b375810a47c9aa8cb570103. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QMDA62132632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x364b48cd3de216ab8db86d4a03b5a8d8b95680775c35000382c28fe46a74c8da. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/QMDA62132662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59a9113880a5ee631f245e79449dbff0a50d90ac7d210203c852796184b2121. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QMDA62132673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea2ed9f32a15144591115185b06b6467adb46658251069d6f454b43ead9730a. 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/QMDA62132671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa871a412cbfedd97bfa7a9d39d300e8e0abdff2d9cf126cb22487d344bdac85f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMDA62132674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff6f1589139668b2ed0d62de003e561bc951bc438bc4c9d30d2093c8888e764. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QMDA62133012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9521127e9958290cf37fcaccce42e4bdc783ff820e180f85f8384455d573fba. 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/QMDA62132995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b93bfb7617833eb4429d64131ed20e94c4579c01d7e11dcff856d2db0940b82. 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/QMDA62132996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfecf6cc84b3516e24bb8f40d8412bcb25c396d45b07f9245e8a27dd3ffb548. 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/QMBZ92127431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfed555995d8acf89edee6462802a64681c516dd0a59b78a84bd8ce951c27774. 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/QMDA62132998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9631022ff6180a8c9c4d962816109653473c1bd3f587bf1b9b37b12d367bf6f5. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QM4TW2103079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c2faca5ca79d13b896621f3995157ff153766e4bed62254002d942219187042. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/QM4TW2056724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9dbf4d2cfeed643e24aa584644f9c5d12adfdfcf0c7fcdccf49ec20a69770ce. 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/QMFME1904287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba1eac00612d01171f1fa397e540ea5dfb05a1f2249a34f70b5307803206d45. 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/QMBZ91767630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf739e65842872ed347bf4adda33f135f5951db8d0ce9579badbe63a840d2cbc7. 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/QMDA61803957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb03b68d7cc591aef39a7a7e559ce6d49043f7f517b4e3820422b4f0e00828208. 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/QMBZ91767632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5b9c419722d557e5f86e4ca71d6d8aad33ff023a11503333f612864515f5572. 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/QM4TX2219945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a88885a0a557c8ae8ba907f8b37aaf611fd8123ab4814d614af125b312e8ee. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2219962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc6eeb986158be0c7bccde67dfde8325139841d3532bff64f11252706f3142ec. 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/QM4TX2219967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47c9e20278178aee1848ad6adad3588c318128f66b4274c83e0b5ca8bbdab6c. 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/QM4TX2220239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e59c7eaa1155d6e1b840f3991a814262d9d08112550c7c68a520496df8e0be6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMDA72146064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92cecd1aa2ca4853177fbf0f40957296f174d74a890fe11088f03ac4a9c9bbd9. 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/QM4TX2220195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0272865df4ddd68acabb93560249e9d81126f6f42d6e47c8d95fd7c59eeb11f. 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/QM4TX2220199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6df6f49faea43097217dca319af0d94ac7f491a410bba48438f2b4d4f1495ed. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2220204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b562732be7b9bd0b1ba27882dd69325664e22c4eeef7708f58328d4b04214d8. 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/QM4TX2220207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fa2808b98ca0f2f2436fce0f52133293fa83378065687c554ccd996514d920. 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/QM4TX2220210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6613e724f9ef9871e3a7a0762e9be2c6d76824514888426a7f993804254b5187. 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/QMDA62176424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe92d9b323019fa4977b9790b8f16f5b9e943b43a4a29a483ccdf9c4082674b70. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TX2220213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d4860dca7f1846dd6237c5715878f3e46330f9cd643354db542193a7475abe. 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/QM4TX2220289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0fded874260955734c1a7b9bdf9690ee4bb5e16285db68d9915abf9318507d0. 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/QMDA62105219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef18cac79c38dd9cddc0219b2ee1fade33122972fb591dc60bd6ef4158dc356a. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/QMDA62105220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246598eb2353cf5484c0d56a070261ac8820d457ffdf834027163fcbc2f297be. 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/QMDA62105221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f8c8ec8ad5855df7cdf7ad479648ac9b0e1bf83795ae8640ef17a2fbf922b0. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QM6N22120887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fe4164edb6cb4c9e88d4de1eb362ca218ebe73cdb8a1c71a6706e98cbf49a9. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QMDA62105223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076511705b686b9a75d5db0f116e7122209785c0ba8e796f5f19878010ecdac4. 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/QMDA62105224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4833fac249f7b8f9b4c5b6c828bb35f97bf9ccc9d6a096d9f1951d14220dd6ba. 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/QMDA62105225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42163d96a608bc260e9647dbece7e97beb00ad19f8cd4829aca92332912b34ad. 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/QMDA62105226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbba5f5662d3fad41af1782463f1d084be1d4b394f57dd1a0fbf7f36ba460e85. 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/QMDA62105227.