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 0xc40c69ecd183ed11f891b1cdf8a0d7dcd0ac40c9b1066dec4b70bf45e194f922. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/23b37bef-430d-47ec-b05e-8db669876aef.json and https://artists.proofprofile.net/proofs/artist/23b37bef-430d-47ec-b05e-8db669876aef.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 0x4fcc32c610d1d1c11f8ce026a7e22a63000670c9c54ec95e42768de1526c3ff7. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/DEPI82412275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f9f5088e3b34a9e02918bd61842b61e6c66186173cd13712222d56b2585dcc9. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:21:53Z), 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/DEPI82412277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbba5c8efa8d4bc54ca2fe6393077eeff1fcf2da8562cdf772eaf00da300ee5. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/DEPI82413134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d9c770ba48ff8e84c52562be403c79ed1c240fab9f12f10191d5853d81398a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T18:07:06Z), 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/DEPI82413135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6327ed146b2abb54f3786741c08b9b88bcbae548ef4e2fb91e9c9ad96792d4. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), 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/DEPI82414166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e6b60ee48823e87f3783e78a7b4a61521c595b3df2842b90ab222448036d75. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:39:39Z), 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/DEPI82414169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x479bdd907aa28ac4e8a41369c655374118cfda44a9252db289dcf2264dba5c07. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:39:09Z), 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/DEPI82414170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c994b14d2dabce48e4a96b67fbe5071293e3d32240c6bbe8229669c59ae58af. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEPI82414163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe998ae913f93fde51edb78c326145e5da844161dd8d3d25dbc2d1835e102d3d3. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:19:18Z), 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/DEPI82414164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaddff4ea952aa1d31f4025a6d7d27f30d6ef7e50c7bf03c6287d0c9ad46e5ae. 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/DEPI82414618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dedc18c7e46148a750125aba194a5b02086a69c5c6a2aa2504bdb0951bdc0d3. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/DEPI82414619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01f1fbe33db281ffaefcf9ebe03398df5e7629a33b6379d9c2c30c9dc03320e8. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/DEPI82414616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x809b77baba2db48b36cef42e8bdeb8792f90f106a41177795b1757f2c67c5942. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEPI82414617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6db78c34c9809da2a9021f5c2a1fa140961555b1adf35e0eab872b546c152ed. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/DEPI82414921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f189d68a75aae8a444ec825f8ca5dbb0e2d30c733e856f1ed0bc75526796322. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/DEPI82414923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4396e74393130653d91a8cdb281746d9314b4e205cdfa87761fe6a2d0588d67. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/DEPI82414924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e0a46e0497df36430ec76fdee6928a8a7531cff7eafcf8eca619a663a5a0cf0. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/DEPI82414925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acc51f480bb5fe3b3f592e52f019bc500607fdc96568586a6b8628e4562ddef. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/DEPI82414919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dbab1d23f4f1d422d1e212508c663bf70496b0e5e1b570e5e1831203ad53a11. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T23:52:36Z), 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/DEPI82414916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7581b96da1e33ee2e1d6b34e815f6d7fdf409e3efb66e009d21dd5831297a9da. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPI82414926.