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 0xab4534aadc60618d964bd98cfd4e4e02757dce44f2a7fad35ac6c3d365a4b8ee. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/b642bd41-939c-417a-b989-1ce6b202e60f.json and https://artists.proofprofile.net/proofs/artist/b642bd41-939c-417a-b989-1ce6b202e60f.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 0x73c04add57fd28a2bb145061a6f8734fcb1307a062d2c6bd4e4fb3e282275c17. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/FR96X1893053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b854520a8aefa9b6b2cda489b613e0b1bcb66ed0736fa362feb7726990db0e. 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/FR96X1893054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0e8fe3e3ded884473630b8a619c81bc3bb19895abd0ecfd8acff21bd2e7432. 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/FR96X1893055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2208c984162ca071e024c8ae5bdb34d8e9b4db03751d5685116d568af536642. 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/FR96X1893056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2c52f67e83531f0a5d2f01b85dee7c0e7d77952bcfcf8212bb17f6ee3c9f449. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR96X1893057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6d7e757383a3703797b018d891b6c42d3b4142eb5d177917472e723d440ca9. 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/FR96X1893058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c870e4becb1f9f5db1050c3a64d349a1741252447ffa623c20dea880e0111fe. 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/FR96X1893059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4894d120df7712dd3d95ea005645bf29da9e580faeeb38497648886dcb17afd1. 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/FR96X1893060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7c4e8882ce67ff2d19c7953faf71932a018ce934af2cff86c4afc107db4613. 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/FR96X1893061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd9aa5cdf857a4b8b4905d1fdaec6daa72f623bba77d0ff04be0b85ab9ebf4ea. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/FR96X1893062.
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 0xcce7949545e61d6c4566b7d3a74e05808ade14edccf6672f949f321ab0b62fcd. 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/DEAR41612745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bbcf61539a2558726e2847c40ba6b39f2a52ad9a27a16b0713ab94d398203f. 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/DEAR41612747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7c2c34bd8ae699f7861227f4902c44c0326ae6df55c703fcaa7672f5a78ffd. 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/DEAR41612751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fb042733561472d8d08b2926ff5c1971a853b4473e527409b98bf2aa8573c10. 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/DEAR41612753.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ee3fe8d7a50f3dc3e71bc9f541f14a6166f525de6d42a4279416f1dbb9f0aef. 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/DEAR41612743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ccbd9f190e8f5484b9113922f777ae93507aa27a57cd0cdcd5bb16f6b931b4. 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/DEAR41612744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974e84afed32791aab5cdf37fffaedab7281a1772ddfaa1bc5a180fff123dc68. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/DEAR41612748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba82afa5e227e179ebbfdb45fa9c94afc04a2fd3117a1e4bfc405e439a8804b. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEAR41612750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3368f93bb405f92143eafad49d9adcec403a0f2d60d30e91ed702f64973c180c. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/DEAR41612752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3790f38b1d5fb74443c228cb08c473e76e562fb034647496244faed4bb932432. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DEAR41535362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e4d09a84f2142c0ad6ebc1e8f68f9a3cbb5d9ac5e34b022f343daa85b51449. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEAR41535363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80fbee3192e11e747cc96e3b0bb3345881429754f162bf8f0f98fdfa54f18d21. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/DEAR41535364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2584e0b0e2292e6299fa6488ca43e5a3f1af99d8fd952ce864941e195d44cac4. 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/DEAR41535365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3963b5ede3f72f3aeeb0cdfe0e4b030bc283647dbec9c708f22fa1ac4750cf6. 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/DEAR41535368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedfc0876fcb9fd4c3f9cac9a4822def9e900b55db63759cc1d048eddb9a58f2. 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/DEAR41535370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9808ad6233bd0715f1c6f6f46a232604902ad0d607737fc3716800509929b491. 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/DEAR41535357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf974ff415ce9b1ba6d4b38ae20554f207e31f6e0790e61422fc43a2f9947bb62. 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/DEAR41535373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f955d757d6fc34559cd3729eeb358277527e19f4c339a03cabb1d4601335c. 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/DEAR41535375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d62354fbddb5321623acc573e6d36d1b757fef3ace973b3a2fb450e8a777990. 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/DEAR41535361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d357fb55a55621bbd5f43dd61c2e0b5c92b1db51316e79ae0df6b3fc829b3e8. 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/DEAR41535371.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x304d7bee3dea02a69f04acfedef6775c8c8fccb1eb20182d4c9776013e166365. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/DEAR41535366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaad544f99a9f65eb7395f4ba675b14ddd7a060f60efa8159773f76eda929ecc. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/DEAR41535367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66de7ef8f10a91953a1530dbae7ab88d465e9ecef9a673731ab8e1a94e502481. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/DEAR41535369.