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 0x2c341b186b7e07fa510b7a106d6ee7cc85547a330483bd87f1c6b97a66d236c7. Chain 2 (Bitcoin): anchored in block 953772 (2026-06-15T10:33:29Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c6835783-3926-4d45-9d42-4b049701c459.json and https://artists.proofprofile.net/proofs/artist/c6835783-3926-4d45-9d42-4b049701c459.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 0xfe1004f6a5dea4922b5e10ec4f58ebec8c55c73f8c90d9593c436208ad59130b. 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/USHM92229840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7be6455727fa117376d1430cf85652e9054e5fb78d0637aa61f6c189303c3034. 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/USHM92229845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2542bfaa720b1d2e393fbcbecb962e959a87cfca9494369cbf52f0c220ecdb87. 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/USHM92229846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184fe1d7b46e3e268254d2eeace7f2e057a539f14cbebf9dc240cbfa9151c455. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USHM92229849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3d9b64f049021635a648d192bd1c8266e830af2614f536c84ceec672bfda9a5. 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/USHM92229850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2399ca831c8ff6de1379dc19847ad879ffd71ad080861d1818717b276c79c6c0. 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/USHM92229858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ff3d685067d188fa6e998f7bd43162de875d6e013712f2a1c9f8fd8fb705e3b. 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/USHM92229860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb83466f161c5598e4050c2a1e4f12e5f6ff736949e548eba39fcb3ad99bdf1. 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/USHM92229861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02958babf53974520db53c80ae0e9c46fca35f2dd2187d57c31dfa50e32e91e6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM92229862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3d7bc6aeaeb9e7351668afbc36adabcfdae03dc110a3a035ac6e34d6aa8b0b. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USHM92229841.
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 0xba5b4c32d392824848e3c8fbab8128dd20f64b57639b91fdc55adbb0f961dd87. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM92229842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdca40610b84eb3e3fba2ee9f735c26f68f0d6d6c4fcea50678bf0d2298ce531c. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/USHM92229843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8234a4c16103b74e33fce9b99d5db64e9ff7be02e27d9db919a94410f112ec. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM92229847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ff4b0f6e95ed2e1b4908ca7fa59a4ea6d272fa59f1921197a39934f68338ac3. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/USHM92229848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2d993d29d22a18a7eab6767bdee5b90a4986e0a5bd0ee52c2c191a4ff91c4ed. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM92229851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x317529091a7da027d0c4d33a2a676707ef01cde5421e23255da0c96a1156faac. 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/USHM92229852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e3d007b2b3781576b2388bc85fb7e5f1afad82b384cd9f78569e958385d321c. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/USHM92229853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe62956ac83b7bc0ede3decb699c53755ed68677faeeaf3a9bd5f92e431fd94c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM92229854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e06f959ccc32ecb617e8f4ec26a86b6b1e8a45c79e2683686f8907f788ecac. 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/USHM92229855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd846f2e184aee1c721ebe16d82a9a063245638077b39ca1ae83c5517d2b9ef. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USHM92229856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc775fa00ff432b8fbd70a50aa5800b70fec7f0d8a80f3012f4cbd0b52853ba. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM92229857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x132744f226ae5330a2acd5c2000c33d676a900968c06078326d3617387a9713b. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USHM92229859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3f80f3df5d3689d8b39b4b1dbaea447ee0e18a6727359eff808bd3de2fe85a. 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/FRX281723537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x968526902ed552212e78c184e2df91c625c70fe7202b49bd5c229c2d5ac7f549. 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/FRX281723538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5ca269bcf7d20d36379ea531de4cc2c6ee921086b8c97327c2a8be9bad6f8f. 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/FRX281723539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7480ec0fab0b3d02494d293e2cc932998e2f3c3275ebc2769885a1a0e41dfe. 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/FRX281723540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26ecf8a131c34e3c4e568ef926af28a7e5d8f89561d260cda8f9a53bd2822cb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX281723541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x825638163fcdd6c2fe83cd36d1a88233283cad2e3cfa769f9f48c14c5e22e5d6. 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/FRX281723542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x624e5e47cac97c04b993294336ce0bd529b3a5de89b46d23aa416d7004116a61. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX281723543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c22b3a814e90e83e9405e16a1fbe61ae3e6c92ebbda927734db4618ea5f05e0. 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/FRX281723544.