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 0x99edfad450fc263801890b7c2a3109e2c2221f3fd7e4186eb345e8aa8ea561ea. Chain 2 (Bitcoin): anchored in block 953691 (2026-06-14T20:39:17Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6a689154-44df-402c-9d6e-fbe17e49318e.json and https://artists.proofprofile.net/proofs/artist/6a689154-44df-402c-9d6e-fbe17e49318e.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 0x5764b3788e597d48a0da27aadbe7c6f6254cafb53879b9f48b630c45f14e54d1. 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/USHM82201922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc04c15a6251b47ffca1a764b91d8f778d3ddd7273836dce20ceae1b0a7ed37c8. 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/USHM82201925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8fe35777949a1e9f8575a1d972d042f550f155f2b9d20f22cc89b12f82b1add. 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/USHM82201928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff9550a0e0ffcb1301c5b78181c855059a234acaf0e1e0659f511ef8896ef38. 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/USHM82201929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39380ba9cb28ff8416a1e96122be940ce57f2021cd0cef715c19138f9e4d813b. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USHM82201921.
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 0x5b38afd7b77195512dbaef9488272c4ff997655bdceca5fa030e284fcad637c4. 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/USHM82201923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdda2974e51951c4c0350414659f7b6f6fff20c2d4dec509e1b6df7dd51824776. 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/USHM82201924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a45aaacfbf32dd940223271595991a63ee7112775a731feb49c6270aab0947c. Chain 2 (Bitcoin): anchored in block 960305 (2026-07-30T20:14:59Z), 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/USHM82201926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be450581bf7474cbe825d1c1324715fb22bfce73d22baab7ecf00fcee4d4b0d. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM82201927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fff7263534bf27279807f5fd096272b619cb8a6932a610ec00e22b02b734f1. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/USHM82201930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1268867a22f319c031b555226f777de99f00fcc661aa60eff8bd526ae2e600. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM82201931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f20580204acd5bff284093d1324ab0e025407b3711eb4bf98cb6adb2c47fc3. 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/QZFZ42210112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b29ed8f09495eb03e19ba0deb98df55590471c45307aa8280bd8d54da82614. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42210114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824a7105433a4403151263c0b24aa2bb955a07595851889163810475e9708db8. 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/QZFZ42210116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x135ed5501fa53e051e7e780e8ad6b60e911108e3e1facdd9902fea8594ad7974. 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/QZFZ42210117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d3376b76a337f42fa9f0eb6b008fc7889cb50670c6d3bb9a65c6fdba4e325ed. 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/QZFZ42210119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea02216d9cf1f77c582ab746dc02a713415c2ca2512c25340f21849e8dae4b69. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ42210120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb54893d281fdca44277e3dcd0e77a6d68794f533f1f2f13e989abef0e8b834fb. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZFZ42210110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce985ddbfbe374cede49a1aad1635f3fcdc29cc83d55f74e3f127ebfbbc7040. Chain 2 (Bitcoin): anchored in block 960218 (2026-07-30T06:57:05Z), 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/QZFZ42210111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf247f608b0e63297bf72a78c0ae085cc5e9c3596ba17f44bb644a51c25db959c. 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/QZFZ42210113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead50af695519123077977be8e9bdeca0734122dc39fd682ab010eb0f1b760df. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZFZ42210115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa35e05e9f89cd3a99c5010c30b659ae3ed5177b703c5298a69dbe15e559d8f. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZFZ42210118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5aa5a8c744451273268c7cd4ce8500a8d2b590f3464dbcbf30d588c035f9533. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/USHM22162967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x478006d4123df36b8bf6bcad2ac8f3f46bfbdbd9ced32f1244a7ecbf8dffa5d3. Chain 2 (Bitcoin): anchored in block 957244 (2026-07-09T01:44:02Z), 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/USHM22162971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7972538d23a56be8eee33ac5a7fe1cdeb00b6fc4b53dc7c68faf372609866316. 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/USHM22162973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x689f33e82739d60b452331b003825b2d901186aa160670b05dd8234042485e6c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/USHM22162966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c298c7211836fd8459b2cbebaa95f1e96658e8aca1c2343d4412e489f770a8b. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM22162968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b283725ce4a63915ccd6c0ed749099e0efe7d04f7aba93b3ec7a35a34d279fc. 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/USHM22162969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f63bc64e46a57757d33a7c402f623207aa397d48edf1e9cf40725f647b9328. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USHM22162970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c782b1b1eebbec89622bf501bd865d238ffba62ee51ce64d7a6920f944dd86. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USHM22162972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d30dca7842f3eb61d05721118dba4e864add2c64ee424425c6f5ca47855e4. 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/USHM22162974.