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 0x5a600dfe623703fe847c89e0133ff45b4d2c16580646692bde1c0c43f705474d. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/67e81588-fb0c-4dfc-b33f-484a600f3c36.json and https://artists.proofprofile.net/proofs/artist/67e81588-fb0c-4dfc-b33f-484a600f3c36.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 0x59dbcd4eedf3a0d173d51adb26cb9ff96441e4c401ced7196ba7e4b87827d7fd. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:22:50Z), 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/BR7JX1400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6320ad1632c59fa63297f17690a0f133be4a482409ad2f90c886af5f3883a71. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/BR7JX1400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01b83ac10a10dc2a5b0e31c15508b83e80cfcfacd1d6444c278641808ad77d. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/BR7JX1400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x976509baa2adcb853898e177db7459157a24f0a9f405754f3bdca059bdd07ec4. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/BR7JX1400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d0be08729f7fa2fe1bd474c62b7fdd08b9fe19bdaaddcdcc55e30729ed4a7cc. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:07:17Z), 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/BR7JX1400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a557e3e27ae38d1653afe91995fb29a588b6f38690d0968c8b5abadd2654c68. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BR7JX1400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf6786312d1f007a62ca912ae53839f1648cd364ed357ebb7e5ca4fd9610c4d. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/BR7JX1400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa214af7f2c1c6d627c2df910ea25e4830176d31b1c19095055b57ec56975e060. 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/BR7JX1400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d2ba77e1d04bb889ecf9192c1224e586a56a11651ff40c29e989a76a1abbd9e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BR7JX1400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3c3cfef680423591310175c322a7001fc8e51a9d7e85e61a592e6f0c13967a1. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/BXPRN1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01fd506de25dada021165da375884d7c572af734261263aaad0bce1d80459947. Chain 2 (Bitcoin): anchored in block 958384 (2026-07-17T08:27:02Z), 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/BXPRN1800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c6b8afe144a6058fe960eb71e039ebd157434612ebf6587cf26a9e2752de660. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BXPRN1800004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95b2523307300101bfea7037b1ed0d7917c889a5fb6ffdbcb15b528982355a22. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/BXPRN1800005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cdb5eed5929e9e74a3a6e0a07d51001f43edfd1e8942930d7b1da3f31eae93. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/BXPRN1800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x870afc0273e762db557c791b4e0c8e78db1a1e32b6f71b61ca29204d3326b969. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/BXPRN1800007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b29872842dc9de475d1ceeae068bb4318b2ab24667425dc38f91cb0fca3bec5. 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/BXPRN1800008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf02e03714fe30db9222553cd429b1587610423cb35fd9803552d4d801ec44c7a. 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/BR7JX2200007.