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 0xef0b3cc0e82eabe5eca038a206ccb0dec232af35b8c3e41d3296119e1496eb5d. 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/2e5e0222-40ff-454d-8214-9039f1f235a5.json and https://artists.proofprofile.net/proofs/artist/2e5e0222-40ff-454d-8214-9039f1f235a5.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 0x6826377d816eaa848df8c46b8324e5b3d26c769e64ba5c81e69f0704f0cdf66e. 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/UKACT2420223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9157c995ba06d582727debb015f426f037dd4a94b55b23796ffb3f19899d55a1. 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/USQY51487059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dbd48d7e64624c72ec15002b20e52893113b47b8ff5f4161922673c6ae1c17. 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/USQY51487060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71188a22dbc649401cc7cfb07b98ac75513fb56925d01202f6b68f4c9ad69fcf. 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/NLCK41024559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f612339d4610a1a4beddc04d4de5aeb219e3579b07eed009da0559df99f1e93. 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/USQY51487062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b37893271bd033a2bc0118df140c24b202978c3133366a017941c11215dc45. 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/USQY51487063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9f6871ee048d5c74b541d943638e6bfdadaf0b7a7ec01cb982f62fccf278a3b. 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/USQY51487064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e60bb84c3d6f4291aa8b89d460779a35726988da0fe8ab516abc185f26fd2e0. 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/USQY51487065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c15825545c4ee53371a9d78a05bc59dbe1e43994de2938172e66d6287e677a. 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/USQY51487066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x092124ac23bc0092bac006486c3ae26f4503eed70a24f9ce65a98d54f8c82bae. 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/USQY51487067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d5c5549637e5c2d70b3ae416446420eeb5d0475efd0ae8945910abdd20a2ba. 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/USQY51487068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae754ebb2ff10382def536f1f088b6c24fe7fb60b4618c92571356bfbf45a12c. 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/USQY51487069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d4cd2495cba2bbad689bd792d1be189e2e943cc34024e7eebe5a3507dd0b95e. 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/USQY51487070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x369f9f4421f24312af32ed2ff86c510c9a40524bda25e3e74aaaf210403ddc9b. 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/USQY51487072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cee1e69b0fa7e0bdd2537ab1d8d9f74f0501211c5367b5bf75d5624217ce540. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51487073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe20c0496af2095b4f5ed93cddc6f55a48455343ffb01da9bcb7ac79c67516c6d. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51487075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0e0a3eede4bf9145b057d52329dbb51d3b5c51d0e57c1c21c6a0361b6b55c1. 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/USQY51487076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7994dcf1e4ef14b9829834566be032c52809ca9c1e6ba9152d37e02a6df1a606. 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/USQY51487078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd516932903b8e48821002b281e7ead72cf3ce1b4161f4c6553fe1ca62ee9060. 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/USQY51487080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e10b7c67014dfc38dc283c1b70b938c6a9a8a303623827a7ae77040da77c6d9. 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/USQY51487081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4de459ffec50e425caf1c0d4e470626b182f262a9bcbfc4f4a17cb8046291eea. 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/USQY51487083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7104c6c29f5de8770b80518f282f6c14a2cc5f6e9dea57a48ea3ff078ad442. 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/USQY51487084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x277a85726920142b0ab588ba449dbdcd952407cf9c3499ad1b07339d1a835053. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USQY51487086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3ea5bc6fba69c4f6c97ae4c744c45c895aa15f46c119d8b487ddfab75f7358. 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/USQY51487088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1e279133d04638e16f21227cdba85e507ac6c4d3c463892434e6e633e89af91. 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/USQY51487089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093304ebadd8b87de5036e8f53f0c425fa72fdb5f83a7f4352d27104089b6056. 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/UKACT2420222.