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 0x9c2d7e867db1f7bba418224e27089c5244ad702849e7005376cada2473532331. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/18740601-08e8-489f-a973-4afbb9033cd2.json and https://artists.proofprofile.net/proofs/artist/18740601-08e8-489f-a973-4afbb9033cd2.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 0xb18916a47cd95738b678c5bf845c7cff029633cabb32d2d53639bdb85786a68e. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZHN52103799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48b5b083f83c4765303be7f8a0e3cf3c41490c6d452fef6f4ba4a17d907638a5. 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/QZMEQ2177173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440b712f1c7eccd8043d9129083af72d57529294e782e8b283dfe870987fcff0. 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/QZFZ62297076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x867b7ae42aa8267c723245276f66e8031a997859c40d3490ae5ec044732741b3. 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/QZHN82259423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf642538d1195a7140431897456cb06bd6a9d998d821db2ae2ef96a25ee798cbc. 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/QZNWU2200571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf817d08b2786e6f6ae8d1e9e286e613985d8db5b80ba9b60836b705abaa54167. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZFZ72339962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25162462002e55a13482027cd5f1ea5170ca47c6395cee2dfef059c96f7331f2. 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/QZTAS2341248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8276f9c48875365d83df6115dfd919cd29f9c0e31f123e4ebf34fe57987466c9. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFZ62435894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x110cb972a7788bdfb2f6358880f90af11f845a5e76507e4fe460b4ea70072eba. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZNWX2458469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58dedbf437feb2c9738d9bb1fbbed4531882e7b655561bb0a520622a956e67c3. 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/QZTBA2456047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdb2f9912dc73d9b152b1a99cf4dd7bdcc9a001ca82ece610ae8db9acf5a3cf0. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:22:56Z), 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/QZWFW2476312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3ddbe7063fd2651936a55fe9a690ea9868871419d5d9178b1dd56afca56b1f5. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ792458556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8440deae09a47365eab8173172a48786889758b03d529c106bfc734d849de358. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/QZNWQ2559974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08d750728cf509715adb594dad59b8c9aa06fb494c926ec7f428252735e09ff2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZTAS2187921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b1cf5ca69d32a9ec71dfb67fa0e42c2c4dca51a75f4376b696fe153ba880b0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZK6F2151090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedb76c6f8663ee2cb15b8d3f3fc391a7878e4a7e0d6f3b083b09725acaa73fbe. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZWFN2463243.