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 0x910f9568b7602520ccd843e0f1d5e46fa3691a3e9be9f44dcc9421908d749b69. 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/cfabbb05-8de3-4961-b9dc-e3d81e0831a4.json and https://artists.proofprofile.net/proofs/artist/cfabbb05-8de3-4961-b9dc-e3d81e0831a4.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 0x07255eae6b67e93274bb28d880dfad80aad30354460e18d35b6d0a2f806bd3cb. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:11:09Z), 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/DE1O62470174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2f267e017ece4b1314bdb01c6feb61dd4c8330b0886bc6e1fd6bcd06ac8afe. 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/DEAR42585889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfffa3216f79eb744d26515de77955105d6a3db880a1b60ff8240d4586e2c6783. 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/DEAR42586080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffd0d7659b0c948acf54acb5924753dfbde0430538722a05040a83608d8b0cd. 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/DEAR42585964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fef16680021b170e8f897109cfe8494246b6c6d6ee20f30d259bac4a05ad18. 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/DEAR42585858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1755dfc9ccc3f10e9170c36b447235280cd6c9c55579d7c3347edae57ee0870. 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/DEAR42585926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43a04d8e3d59236ea24aa18d90ce0ced99efe792b4ab7bbbdf561a10b261bf9. 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/DEAR42586257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f7a03a6e2b7c3bddccb72363b0f9fd41c9b3c10665ade5ceb75991a317f172. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/DEAR42585842.
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 0x3f32cee346c2b90282299580d4a9178c7930e0d1390b0e40bce02806d7d634b8. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/DEAR42585857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23c793622222d569c22c12ceb3255134253ff0cf1509e2c91066803670545b2a. Chain 2 (Bitcoin): anchored in block 960155 (2026-07-29T22:13:32Z), 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/DEAR42585895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ff0a443c9b85e0523b087c633eada32ae3aa2fd9be1f7252e26e95127282f4f. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/DEAR42585941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6cc846cd9323d32d0d798b528cc0293d30da966d820c33501d1d8f30e182d5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEAR42585991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae62133f4a4795d4338a85e6263d5becd2038a25b6557080c0cc7c2cfbb90373. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEAR42585843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3287c2f8ddbb3f90ea6932fec4c1a707b879d82b185cab5fd5778167c8b1f49e. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/DEAR42586274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c022cb8627f442c7e92f1d87ad7857261c0117f72e28e887ce6e27e84ebed6. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/DEAR42585975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2654ba7b82351ca4edf897efbda055648573dcfeb9d885a249cd79fc94541078. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/DEAR42585887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54764dbfb85cc7322cf10e1d706aebca7f30f2b7eea6cd0404737010fbd904d0. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/DEAR42585872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e1c8d027a275c94edf07723f94844a5b9ed98f77b28437e9bc3a8b4506f312. 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/DEAR42586480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0ef9e44838b5d00034ee8d9cbe63c746144a69c87cce27174bb40060f8a0a0. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/DEAR42586470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b13a1ee634f7336ebfac6fa3365eb247d6b3f96915e620d79688701bcfb7c3. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEAR42586178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ba173a406cac746b34fcaee012c49081a8e26c4f5968eec2c3d8e60291df4cd. Chain 2 (Bitcoin): anchored in block 960165 (2026-07-29T23:29:40Z), 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/DEAR42585981.