thumb|right|upright=1.35|Catholic missionaries in Papua New Guinea A missionary is a member of a religious group who is sent into an area in order to promote its faith or provide services to people, s
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 0x73d5b8aa427d124ae7833028938d2bda365ad925e9cccb7808d093f4fd9a596d. Chain 2 (Bitcoin): anchored in block 953968 (2026-06-16T16:01:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/28e4bcae-463f-4f3b-a3cb-82bf93235977.json and https://artists.proofprofile.net/proofs/artist/28e4bcae-463f-4f3b-a3cb-82bf93235977.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 0x2efeed6601ca244dd8e466e0169b4c91130df5da41d91fec9bd648a4ccf9043c. 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/TCAJX2505160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76312f20e182c282d9cda1ddc82284990160f9adb9fced8027805d306e4e1ff3. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/TCAJX2554934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x576ebc8c6ba67de0a9dcb59c866d94631edd6652423cefaac9b17af1acf347de. 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/TCAJX2554843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a105f58457dd157bfec94b89b4cd6a6b1acc122e8f78d23bd3207534eece9aa. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJY2555002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318669ae1b54bfc98f6322ef1c7dd71c09db780b87878aeeab4809034480b5ff. 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/TCAJY2554907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c4d87876be79c2e8c0ddff31ce032208c018c8c927da0bcac82a695bdad296. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/TCAJY2582339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d737851209274a262d7b69000b3711f462ac535cc54984ef3f243ad2c757a7. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAJX2582595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c43dbaa58cbdc5ecbb9340329958cb3eb56bd7b1a9482a1a99928a06d363d06. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:35:05Z), 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/TCAJX2582300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bb821f9ffca68f830d38e31af6085d33b4b7bc5bcc0307efa490ba6dbd42c9. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T10:05:23Z), 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/TCAJY2599363.