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 0xb5617f5f259e1637a5b03719b1e5259a9f2adf09dae84c8136ba9ceead06ca47. 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/b3ed2def-7f8e-4cdd-bd23-10d26a8736c0.json and https://artists.proofprofile.net/proofs/artist/b3ed2def-7f8e-4cdd-bd23-10d26a8736c0.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 0x280d062b9a52f4524e04fe6edccb926eba076ee05ecb6bf4044c827e6071266b. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T01:59:18Z), 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/DEU670100010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf690bce46306e41e19937c02990dcc45f792d7fd7da5024876b06dd05883a334. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:23:50Z), 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/FRX201739720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62b10b6575019fbbcb71d70a6a6204daf9df421c06ccd7a0f66c5c8d59584646. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/FRX201739724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba3831b285fd070e1d713bc7b7910d71ca669c5f75c825b52625f9a79d2547bd. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/FR96X1843008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93653b584f7ce1195a0d2aaebd269611c9adae7cca98725dea8c5e3333ab08c8. 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/FR10S1968019.
Texture 40.1 - Claudio PRC Reconstruction
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b64726247388502a5cd0b1e22dfd7807c954f5a97cc51b00bbcf1b70ce37857. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:19:06Z), 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/FR2X42343834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32727148fe0ebb580ba3dd8f90e63c1242cd5ae92a705c7b010e7cb0df2eb1ee. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:43:04Z), 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/DGA062494907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3c44e7c8cebf3c690112410dd6dc085179d0d9e7dbaeea9e0f4451c04100b. 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/DGA0H2491444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x900135ae2820ee66ffea50963b026d65e477bfa552e581c7ad3ac5fc61cb1338. 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/DGA0H2491443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea3c44e7c8cebf3c690112410dd6dc085179d0d9e7dbaeea9e0f4451c04100b. 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/DGA0H2491444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd63ed07cb7734f2bd8763c37a8f480ad43f628a282a3d4da16faf80d7f439ef6. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T02:31:22Z), 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/DGA0H2491445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae02918aa0d50a9de04e07127ed0a7f6fe955479bd4fde93711606326092012. 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/DGA0H2491446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe825e91e68bd0276792ff8c36e3faa9b05e71f1b7b674345b2671fbb5f61896f. 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/DGA0H2491447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x046c5cd751c0b415a37353e950f8bdb9673bdf05d4c8b1b29429d4660179841f. 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/DGA0H2491448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed2fc414bf05c3bfd7c8c3606b7f087660d71326f93313aee2a57d991069f5cd. 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/DGA0H2491449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce54bead6448f961bc37e9fb0482b072d93f796ff73495e246946349a602c30f. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/FR10S2599724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7aac6cbc8b4fd9d4fc2bccad9ddd7ece0e343b1ec793fe04b954b95ffc665b. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DGA0P2496099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e7aac6cbc8b4fd9d4fc2bccad9ddd7ece0e343b1ec793fe04b954b95ffc665b. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/DGA0P2496099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20d6dc22a786f9ea6529a178342af06a7371cda720847759d1ab88fd7fe7d23b. 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/DGA0P2496102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2eb5c9615a8f54ef55210614962f7fdffdf357a00a2ae1f7f9fcd10394c47e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR2X42506694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46a2a4173514ca9cab750caf0d42119f604846a4097405c05b647cc66d50c7f7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T07:48:27Z), 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/FR96X2427550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3856ec99c2bcdee632e4521617a4a8e5520408b2373529bb5f9b9a3335a8107. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/DGA082421634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b2c641954a260fb5d63188d226702a821daa432d7eb70a22209d6cef8aee93e. 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/DGA0Q2410848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd138b365a9fdcfa979121872307ab16d506114bcbc7096e5411a854b3f67eabf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/DGA0Q2410851.