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 0x06fe0a3a564404e937c67a9526342b332ecc3632e5863d81e80260012e0a1509. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bf10d075-0ff9-4a8b-b1af-0f1b1d9595c9.json and https://artists.proofprofile.net/proofs/artist/bf10d075-0ff9-4a8b-b1af-0f1b1d9595c9.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 0xf5046256766e82f294b6fdf73396d7658e97666df15429201f6682cc4ee63a91. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2300732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x737f4b1820cc19ef88bf0122cc8e0f3af58f1f8ab50accec2f054027dca0d4c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/US7VG2300734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7d0384bbe0391c207dcb37f3d0469224cd7a04975834083e7523ca4a82ada9. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/US7VG2300736.
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 0x7ba8b2949974439d104402e022404c2e263acb4ab866c7c6756c269705aa9392. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/US7VG2300727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6469a2b0c18206ede3e02daed37d97456f9db8d92895d1d1858ef76244b14209. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US7VG2300735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f80526ecb956f3baecfb1360b80e7620b3cdd1973d74e5c9ccd3066c86002e5. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/US7VG2300728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb1520ebc87a511db41e9b39a42447449f78bb560873a68f53d154e19126e5f. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/US7VG2300729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeffd77f2dc16655637d49583e50f3378656e372b564986fd5e3c8d87e732afcc. 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/US7VG2300730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f962d84d829c78b38442c77deeca8c2e79de4335426659b571330e5b726526e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/US7VG2300731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3998a3812dbbfb57288a885980f64cf1d2fa25133638d43f1cc610e0c986499. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US7VG2300733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981f4379d29758b227f0603e7e49f8faa0a3e9231e0f55448d7d3b98516b9a6a. 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/QZHZ41922842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb33fb00c57afcda9e42d57b304eb6fa00a3de48bb64ea68359905f9b50cc1d. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHZ41922843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866b4e4513ea02fc5c1a0e1231e847c5055e1743941e574142de7c9c9f4b3a31. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ41922844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb9ea743420f7501814e295f4f19eb5a133d3ae0895675bfcbd345062f60eed. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ41922847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f09f9314ec1bf4da11cbdab3d76f334eccf26245ebb288bacfb93677f3b10f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHZ41922849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf160279bfd5fe5378ddbe44b4d8b0ed47b43180db37026853f1ba8df5bbee4. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHZ41922850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b28a7a94910e38e8a9b4f52ebc1dada99201d567ae2d3e414db71c327b6e12. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZHZ41922851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82fba262d02b619372319c2ecaff555b368df51df7812c334df18956ea101c9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZHZ41922854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3812501e019bc13532b451d6a7bbb047facc83cf91706fd4a642deaf65bad5. 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/QZHZ41922855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb51884098975bc21bf89fa515a30fb43faf5fb72b4868fc252436a29e4114c94. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/QZHZ41922838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3301a62f1679785f010b005eed49edabe8fbb7aa4e0bda6a03bd9ca0d84057a1. Chain 2 (Bitcoin): anchored in block 960161 (2026-07-29T22:51:26Z), 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/QZHZ41922839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1cb4b1b7c1b86b22f57388535af6184ff246d3e34fd091db3247443a085e757. 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/QZHZ41922840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050b62a4cfb7431b5f17907dc59c20885bfcfb63d5c719338f4f27ed56524a00. 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/QZHZ41922841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11ae17e18fbd6cbdd5bceb2fbc96d364ac0a63c0eb9551f767583fa6534c525f. 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/QZHZ41922845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd769c7687862906e5887cd4fc84a16fe419c49a540f0ba5aff698569bf943430. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ41922846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83c9b81f4bfdb15566cf8c6fd3ce6681407979dbc751314fe29503700a557ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ41922848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e47746af458b9bf03d31c667462f56e655f6540b151962fa9201e68f5ea91f6. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZHZ41922852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba436ced64baddfd2df5efd40d5d247106449a43999d340f2848be9a4bbc5526. 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/QZHZ41922853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd59bbe685851f2ef43833fa209ea1a97858ea69acbbaf17555a160e01fba45a5. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZ7R42455672.