Blue is one of the three primary colours in the RGB (additive) colour model, as well as in the RYB colour model (traditional colour theory). It lies between violet and cyan on the spectrum of visible
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 0x5ddee58aaf11f3d0a173a8fcc08b6d102bf8e0e85a06ddccd88dbc40e910cb38. 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/e79d52d1-8a4a-4ccd-985c-0c759acb1b8d.json and https://artists.proofprofile.net/proofs/artist/e79d52d1-8a4a-4ccd-985c-0c759acb1b8d.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 0x05634516dea887243cd84d97c2cb492924ff2875cff98b73a002f81382c8f5fe. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T13:05:15Z), 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/QZTB92480067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cc8cd76cdd540feb680c446ed48dc8150b2861df23080bb06197ac76adddb8b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB92480074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5065cd9e1ab63f42ac3f29dff248f6194d82adea85df58c90b7c8b6531c51146. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZES62539430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f6b8f79ed4f97360235803a80d4c7baf28d8be8356728effc76a9413f4614c. 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/QZES62539435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a91a60f51b8cade938bbcfc50e71fb1a88aefc1449cf755a9518f3c5110578e. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/IEWGI2519900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94ff4521156041645505c5c730f8d113d5fca472bb5ef799a5fbe9d4e4b2957. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/IEWGI2519938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da4bb560de5a178be46216b976f366d5665355b94d45e8964a0616fd2eb5a41. 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/IEWGI2522522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2db52e0112970ad6b9bf2e7d367ca66103a02eed155aaa8fabfe4083ef9e82d. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T07:55:56Z), 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/EEHM52500795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac819de81f711e5d77eed2ec4b2b03313dd0bcb84ca90c92645078f439bf7d0. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/EEHM52508363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f179d5bc74167b37b3a4d823ce385e82f74be0ce1c01c61dfe6e491633e332b. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:49:39Z), 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/EEHM52513788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0928b8fc4df6b08240b994f5824ddcf05f8131105dea2ea8c725ebe893bde796. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/EEHM52514719.