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 0x63959be01bad13c8bfdb647b09b1b4e50113de205bd1f442fc6f541d72699c8f. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/57edd179-d1d3-4056-beae-61df8052c8c8.json and https://artists.proofprofile.net/proofs/artist/57edd179-d1d3-4056-beae-61df8052c8c8.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 0x4a1d9b544b091774b119ff3dd7fd20cbf7cbbc52a02965ae2192a893083fd581. 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/PLC062112268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5317d7b99f426a43e53b92b656e5590eb42f423a501c6cb4edbb0b9b01bfb351. 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/PLC062112270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf41a5e39b993b19afe5128b9e156677ba1cb6621f5ae15c66e6c173aaaa4262. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/PLC062112269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f0076f6cfbc1926ca9548e59aae256f0ede44499a0e39b27083a638129713d. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/PLC062112271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1251743d4fc2fc58ad8e72d268ce75985701d056669b4d68fbac710d69dd522. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/PLC062112272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1889d0eff5b7229a9340af488429f2630c107eb35bf588e9eca73d234881edb8. 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/PLC062112010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13e667b9cc23259d5af7c2e6f0d6cf37824b8dbd51d17a72270d319bd7ca4178. 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/PLC062010562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a62d18fe4044e288e622427cf220a13398bfa10710788975d844b197d971fd. 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/PLC061908815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb6bffe47326811591396ba7491239314288e21edabcff8a3d422081965bf28d. 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/PLC061908598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe481c355b80588e6690405d94bdac07b1f58a93ae826452c160fe588d5a9df18. 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/PLC061908299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d992068ac285c0cc37613c903700133704bbec6bc84f75a17761102bac09c9. 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/PLC061908045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c41ea53aaeba9d31b1d06484b553853569f3ccb0d7302a563b3ee4cf4ce2c81. 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/PLC062112387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81963d17d11e6535673a9ecef6db65458d0dd2f2e3caaa9d06d5fd30cea52fb. 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/PLC062112612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18cba68e4f9f7d5234d9c3f5c8d9ba89c51473a57fa023b551a412dbd17d2b9b. 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/PLC062112614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5a2471741db16e07eaa8f088cc0722fc9f8a42dce351d70fbc6a3e080fc9728. 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/PLC062112427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e8e811edb882fd491784135e122780c2f80859b61719e4bdf22049c93f83461. 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/PLC062010446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d7412c3c0a918b2088aabfde22e81b60afccfe27c2641519585b2d5ed53d370. 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/PLC062010608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0bd954a713d751fff0307d40628947751fd8f68b6f231877e11428c868de8ad. 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/PLC062010365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3688d8cc66cbb17440ac18f1fc53a5c74720bae5c56a1fec6a612b33da8c7ab0. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/PLC062010552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb18c35bb438db254b3d1c99c44431334260474545878e0389302567ba6496f2. 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/PLC062010553.