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 0x2045e40e614ab6427a67c6460850c634d5a0bdf9fb2a7851691c5e72b002f67d. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/532a6ec0-df97-4f8e-b8d1-1915cce7fced.json and https://artists.proofprofile.net/proofs/artist/532a6ec0-df97-4f8e-b8d1-1915cce7fced.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 0x3673110a7ae5dccc118e4f7cff06cc36ac2c6bb8102e2924e8052508bf62ede0. 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/SE46E2201502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fe5eabc3931c89b10b5251c6fce0650ba625410a395351b1a0bcb99f8d4e9ba. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/SE46E2201509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e628d9f55a4cf13a0f0b5ec0c9e4b176b5179313789c371222b09d5c12dffc0. 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/SE46E2201510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ea3990b92031d3ef53712ea730d3dc3c39dd52812fee9f62ed7345c3f36568. 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/SE46E2201506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb33560249bea21c2dccfca632bf10409caec3bd40d9a2f643ce6fcacd6802ba1. 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/SE46E2201501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639cf664eda197fbb1a37daa14853cd84f1c10af5f60e91bafc9a7fd1f6c0c83. 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/SE46E2201507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa0f40d6b373802142ac4e22f3d9ea6727fa75a0ffd56b2aa18e3991a8334fe. 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/SE46E2201505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1fb4fc4ed2f89e25ef8d97d193ccda5912877d73a195371c2ec8137116f7505. 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/SE46E2201508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6666474ad0c0652e37856db6f7b758f035cde155b8a33969eb8da2882c61b15. 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/SE46E2201512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf1d24e8a2f5f5bec7eb79bbfea48c4c967831a7b23c8eb45aac90fca40f661c. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/SE46E2201504.
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 0xa6de26f47c27c1ee3ee74605d26bdd4cc84a0708c0d4aca23d3218449084a3d9. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/SE46E2201511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x485bad7ccef891244b7599b51c8c2ee390efd44120511230d47e7a479715a4f5. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SE46E2201503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ed9b84f19e5c0472026253356fc0b5e966c7753fe9850e86ba31645c886167b. 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/SE46E2000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbd09a621803117a110382b1d7e848e31726deb8b59c1af73e413a76f6984e3. 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/SE46E2000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6062a4ae325d20106151a45b7974ce3add071dfa310fb315dc5fcb399f6ae6c. 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/SE46E2000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5720b042ae5a88721be1fdc9a5a54c65f5c0423517ac9b1cf8fc02454e54254. 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/SE46E2000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12647c1b94212874e59d876ce322bb07d8c253cc2010d016bef5489385dabd7d. 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/SE46E2000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3532cc4a35e2e4a2c2fb0f493ccfee4508c6ee44f6b12e57b50de9ab1d26ff. 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/SE46E2000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x551817866955b469ac0af87538a08327963d57575be6b000a2c7b979e9ac8c9c. 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/SE46E2000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda954f85da3cf968c2435596995593d46281823c7a232a0da2c8cccfad9a53ee. 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/SE46E2000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943eb0463c083ddf90c4fe79ec2ff0a02c16bdabaed3c3e9a3fed337ae841bcd. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/SE46E2000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f622e4277a8c821c10a80ba290ce6703562237f979844c92ada185abc6ef1da. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE46E2000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e513f56b074ba9bced3a24228d7e0c9983e47d1b1263a9924b4f6d4d4a5a33f. 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/SE46E2000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a08f84d880d6267ed76edc76c20d399611bc970f37f98c164fb2abb2ae96457. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE46E2000110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3186b28b7d4049480cc0fb93cb7666f9aeda5b2ca7093f500c587e2bc1f707d. 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/SE46E2000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40f5f0696ead074aeb20a3fb111f11b09250ac94daa7e5aa4d7af5510ec1793c. 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/SE46E2500101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4a95ff329b3d1cd9377514bfbdb65196958aefd556f70592470f375b8e1fc3. 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/SE46E2200610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31cfe74c7642b8d4dd1a2f2a19cea3ceb1739cf28c02b1900dfb723ed7dd9cbf. 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/SE46E1800701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bdaf905914a9b6dbb011cb39dbe42769d9ba423fd930fa27e49a64c772bb87c. 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/SE46E1800702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f611ba09a3748d7bbdf2f5c94c9f87f5e05ae79390f547c1a5a2f00f2f7298a. 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/SE46E1800704.