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 0x2a2ca5a54a8aa65a0ef78964de0172c42cbb6aefebc6ebcb60d3ddfe0497a10a. 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/0be4cfd2-d115-4855-a7c1-ca9c6b3a683e.json and https://artists.proofprofile.net/proofs/artist/0be4cfd2-d115-4855-a7c1-ca9c6b3a683e.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 0x02baf450589c945ba3eb82768164d15f2c8db3bc9c1c0926b032f0d0a7822253. 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/QM42K1966400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbb41a7c445f3a6c08b9e0c0171287d7a4d027c0c8abd3300c6d177a06824807. Chain 2 (Bitcoin): anchored in block 958625 (2026-07-18T23:11:57Z), 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/QM42K1969451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66210bc5f6ef7910afd7eccbdddb02a00c44f4b8a74dde035c97ba7c377b3388. 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/QM42K1992712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f9509a05a076be2b50d421d452b95faad5f05c07acb20bf8ad40abb00cdfd7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USCGJ0760155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69110c9d908c22d48b1316b1d7d31937e80d51eb537118a9b322d61bb2313511. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USCGJ0760157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6407457160c4eda96c219f6d222740b79126b97056dd52ab4f8c1055d5ccb1c. 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/USCGJ0760159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b9f4eb978781336835e2ab882997d30a511cb091583c9e836b0b9068dbfa7e2. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USCGJ0760164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac6c73edac3c73ff77cde080ad97764821e9fcbb868ea9e82d2a1a25aa97674. 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/USCGJ0760165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc837aebc5ee10077848af56b65ed40a6aee9f20dbccd9450271a846098c0301. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/USCGJ0760166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa65379b634ab7bd44deaf824480df707fce3b3e251b41b48146ea6e34251b98. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QM42K1972343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84bade51c6df6a59670f8b308697b6da5e75a6dbe5731997e3b9a128df982e3e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/QM42K1946079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5451e4b4a76efe6efb3d7f2dbfb3e9f7a0cf9017da7aed6cb4fba52f8107188. 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/QM42K1992662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ef0bd307f5d0dd7e4ff4e81119580d5c27dcb2ad9ca664bdebedf9c882729c4. 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/QM42K1990855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c003a087d9ae39b9f32e34bf4559bcd5334a9f08989078e0bac71e13dd70dca. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/USA2P1437728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22239e2e1d8d74a27dc1281e9d0d5e5d395f3b7ba912aa0a9177e2b25e7b6843. 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/USA2P1437730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93d352dbc3c1d13178a4dceff2c68602e57f2d5033f0d34e839ef54111e7a2db. 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/QM42K2391860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeab405f1920d24bcd3ef90854b4ce2f8357fb495d5015e68865bba428c1bd093. 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/QZMHL2389801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ad3910245110da9e2cab466c12ebe6079918b36dc8750e90edf7e49a26d4e7. 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/QM42K1932370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b6e2e3ea80e50af892aafe901b5eaaf7b9c711aec913b73648d595228344d20. 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/LKA000002602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4473ae39cec0005a7ab4c03a508ea0fb601f91dfa8fe1e391dbccf95f1310953. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/LKA000002607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29fe5cf814b3733e26cef16b2424796bcfd7e499edfe90235e0e18de2d91d423. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/USUM71118920.