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 0x7160e7558fa774ba52541965ce3f350d90925c5b5418193b7fb0420b0587138b. Chain 2 (Bitcoin): anchored in block 953695 (2026-06-14T21:42:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6cec3260-f933-445b-a37b-4a3522fdf648.json and https://artists.proofprofile.net/proofs/artist/6cec3260-f933-445b-a37b-4a3522fdf648.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 0xfd0889d23cd94f634f2f82133c50cfe4cef245510ec04a5063878ec156e52d35. 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/DELJ81813642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb73008a96d43feb04c79d620a3977f07f622027b0c8dbc7143f47ab81213b493. 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/FR96X1936239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a30906e376be26a3403cb15f9f8c24ce38aac771434bc4c37056ae4607ee1d4. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/FR96X1936240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec18219ae37fe819f36b64ed54f3912d22e7497639c0f67c91d6e486fb94bd62. 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/DELJ81817901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99b7bb2a2aa42ee97854c51010c8e8f3747c4b50894e7d0f180754e7b448d9a. 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/FR96X1936236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7626e46d50552564807aa0e477daa9ab63410e9275b1feb6c535d5ce8275df73. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/FR96X1936237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04cec91d24d4cd1b9e8d4948d13f8c3306c88bf1a875a324b091470f70d82e89. 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/FR96X1936238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1701d0b3653a464d24acdb748fd8aa840f151bb2af59b950db0242133de72647. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/FR96X1936235.
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 0xc81a98382de5cc4c9d27455a9610c6c8713b5ce7db768006cec146c08d5c7bd0. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/FR96X1936241.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x617db2845cf432bbf4e0a97edf283542f7f809c489beed77d853a758c94fa0f9. 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/DGA072196697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d94a909537c14a8270c24c2b420966ce1ec845dfa5cbda24893c6835870a2ce. 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/FR10S2187396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa728cde28810b08e1fdb913d308967a43162a6f28380138acdfbac0549d8be7e. 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/DGA072196700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d22891471479fc773f36b98f26f9119b437c4c20dcdd235edb1ed3f687467. 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/DGA072196705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9059c286bd2bed88156dc1f0450f3f78bb97e6d3d98c1aa1e1a9924979ed0e55. 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/DGA072196706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f18dd062f0bd1e75d8affff6ab7634e094ce1592ac93aa17c8e9f62793f2e6a. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T19:49:42Z), 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/DGA072196703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1422f4910f8e16abf160495d57417adb78e88adb2a5e5e957f445ece6a076b39. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DGA072196698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30abe29b91a082a1afa01e402f8f8773f2ee313d909b6b99d2fdcdd990c0fdd0. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/DGA072196699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d4dff2a0e720bfe741e0e33866fa2de275a4ca06c63bdcc33850b00b68e89c. 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/DGA072196701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb53d22acd5d6448bdff9622c379188e582049cc564f49e5046ba538d4765e85f. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/DGA072196702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecf1fdda2d11e3d2262539004cefd23179f14986ea6155ffc6431c38eb1fa237. 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/DGA072196704.