thumb|250px|March 8: Gnadenhutten massacre of 96 pacifist Christian Indians carried out by Pennsylvania militia thumb|right|Monument to the memory of the victims of the Gnadenhutten massacre Events
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 0x571c42e4ade380b2d475c2d89692cc47256d579fe4d6cdc1bb9d86a0009d965a. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a98608f-e1ac-4662-903d-85d5d820174f.json and https://artists.proofprofile.net/proofs/artist/4a98608f-e1ac-4662-903d-85d5d820174f.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 0xe2440d8dc6b60902f2b7f224137ef8bc141fb045add410d66f5c5234c9919729. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/ITM461900083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdb8656c5d2857748db699a11e143dcf18555ed8c949d6c38a6e0f37ee42e5a. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/ITM461900084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1e829b48e8fb24f896553d78e8e0fe65f04b571acdbac36fc6d584e4bc6229. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/ITM461900085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8d454502890b7f3e383459611c7cdc6c338094f37c2d12b85cc4cecf96ba305. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/ITM461900086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14aba97b9b694b62ee2465fcf8a60df51b42d2d6b885b65de759f1fcb04d86c8. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITM461900087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7f3ef86c2e39a8b037c5ad0b8e1137447c59a02e6093394257e15b8a9a56916. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ITM461900088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x323d0ae8c3112618a8c4ef03d13a7adfedd6689a3d9bdc6231d739940ff10dfa. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITM462000152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e0f92be0f9fd7f8e11cf7a52e1c6b70bbd008e96eb18932d3a57260bd036fa1. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/ITM462000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7adc42139e79a1c5610048f2b3f35e569bc78563d34f45b7a05259cac9e8d81d. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/ITM462000155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28be90b44a946a31284116bc4ce8c88cd6d310bd2b11bf5c6370c030d71e415f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ITM462000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9468abfc197739545999c7efd7aca4fe0719bd56994973b6f1657f3341fd0855. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/ITM462000379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb3e31bc41ab007f1175a27a143f84f6e145a73f2d2fcb1dd90700e8c3bc1c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/ITM462000381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44b693aa2597cf4a46a725a41a45c3ea681d9fe5ea9efc6e97f2354d88e2a5e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITM462000382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e0113dc6f91f68f4f7c742fe02600e4b1a8e77cad410ee07d3ebffd6b086a. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/ITM462300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaa566c0694591a520b758f3584138eb4c345d37de1af1fa5db6e70c430dcd07. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/ITM462300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dca0be59f078df0450960b99ba30848e7b91e628a3b0da2f1ab3905f67cb239. Chain 2 (Bitcoin): anchored in block 958920 (2026-07-20T18:14:22Z), 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/ITM462300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x273d44768645798b940b190a4118cdbe8b74826baec893675c443c0723b69990. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/ITM462300022.