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 0x7fee876395365833b1439dd0cd1b96e8fbbb76e26251205a75af74bf101b64ca. 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/cc4ebc50-5c1e-47fc-bc88-2c1cb236826d.json and https://artists.proofprofile.net/proofs/artist/cc4ebc50-5c1e-47fc-bc88-2c1cb236826d.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 0x632db72a3a448ce92de8dd5164d68d37b24681fa852dd555afef60e4aef965eb. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/GBKQU1641571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf0938773463f20ded5395b610a4387a3077783cd746b31c4bb96a18267054b8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBKQU1641578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbce7afaa14b6a30e7e6a20187a662d6de7c71474174df0ba4f4e236a285fa7be. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBKQU1641579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa79f4f7d339dfd3b64c2a65962d626514a89c6d47a6096ced7bed95668832471. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBKQU1661866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x444d120fccbc6cc3e5d820f7472f3b60f06d726b0d786d65558641b46b38496d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU1661874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab8d0888132f6eb723ab3d7f1d483967f4794860d20a9e0613ff45e6eed7fbd1. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/TCACU1615611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbeaae3763298d1293bf0c16a418279c22310670afb68ebbc27f982fdb60fde20. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBLV61637964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb7598d072ada510e822ef8d93ce86a59deccc017dc9f0feb526470cd3b1fa6. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/GBKQU1715332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0d94bac07a818d53cafd333a68aa25f51007c144c17ca902325ac7f082e53cc. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/GBLV61804769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4daf442f0244de94e8ebc2e7144e9b55769b4784cb4b9ab4e6f1a0409211a7. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/GBLV61804777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e95865459bbfa05c0e04b5eb473443edf5a673406bab4199aef9cd8f0e0ad84. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GBLV61804780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976a7b4410fcc4fb4fb633ad9da9f8656efd11a419ec710e1b9957ef9e83c74e. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/GBKQU1924130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0640d6834800a992305ddd5e6537bae4f52e352ff2164b7f670928d476d55cf2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBKQU1545681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4089438c8a62bee2b63394cc257befb8ac5aa689c07a904c991d988276ee5394. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/GBKQU1545683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2a3d7653bacb62841c666bd452dda11f21eda55c801603ea649a1fa585f2c09. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/GBKQU1545684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53aae751de923331df4acccf2af9fedc32e90c40827b537c126b64a1c672d10. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/TCAFN2152735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd62bfd945d958ec0e0bd81ed81c0aec93068b9e9b1517579b382f2b951e193. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBKQU2187957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fb2c883c2aad4eed991f3aa18adcc9213c7983300328c4d39a3ce0d02a6aa4d. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GBKQU2191706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67010d0a5d175c9c971be78e691b92cab74715359cab37eb628baaa781678951. 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/GBKQU2195056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f30da60a568520c5fb7f475fcd092244e469f5cd14724a6e2bc530ba393c61. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GBKQU2195061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20355a8bcd299f7ec4e8fd2cf1ba83f748e9110e55119faa7609a15a00fc04d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2195063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c33716efc1061aaf903725dcfdae7b69bb160ddff725c424162d0cebe2d2715. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/GBKQU2195065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0349f66ba24946b308cfc8e29060afa9f8c1259e61cfcd59246cfa320ba383c. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/GBKQU2195071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7f281f4fb8b98a86fd75333d8beaebe1514a4ed42311914a64c3314bab77095. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/GBKQU2195077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e5da5640d0af04ca9298587ea6acb35c7a16c26232b492c4a1fd2916da2557. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBKQU2251851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25d99ea315be63c48009d3fe59e1969b876a73d7be2c5e5f61a4ecd8ce8cbb6e. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FRX452267022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647b0c94190bf4e080056e830ca384a00b6ba834e5df5069b6d101b8767c904b. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/FRX762236002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc11e828dadd515b14d6014ed03c45bf8b2b184289e22e5a4d859fd569dfe34d7. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA052332736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b9d9a474d4075e7dffbff395a08358202a22cf14b6cd9a344a7ee601d6a9ac3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DGA092370243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb727484977712e7511249959be02c400d10ee6a8f08f0fe3a53cdf4349719f4. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FRX282455734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa65ba05ad078b5738336c8670873fccb7e47dc4008628302c166d6237bce2288. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA092420200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1639eb978ca88b82f037d0e908f68b3039fc43d6738b5671892bdcd19404eebd. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DGA0H2482364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76ac3da632e148a8f58bd3ce6774232c13786a74e23770b5181b6a500f1c53a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QMDA72582039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75540c03de2e60e02e5a7deaea0262c74dd1bfddace7333423a1069de4d87791. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/GBKQU1950613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe728f8cf3b38e34a3bdb686129666f830a82b8b258ec0e2af4748aa8d97f1283. 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/GBKQU1874054.