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 0x9fe306b872086d47a1936785e27d4250c82ea65a542f31263dddc22098e3d768. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d6d026bf-f1ab-472c-b4a4-894043af821f.json and https://artists.proofprofile.net/proofs/artist/d6d026bf-f1ab-472c-b4a4-894043af821f.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 0xebccfdd39db5eaabcdde3a8bfd6c2d24e4e4aef339777df64381b2cdc6dc79d4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:41:11Z), 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/USN9M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da487fabb0d22a72886db3fb7433f2cec7989f7db3204cf4b336bb4b72ffdac. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/USN9M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebccfdd39db5eaabcdde3a8bfd6c2d24e4e4aef339777df64381b2cdc6dc79d4. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/USN9M2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da487fabb0d22a72886db3fb7433f2cec7989f7db3204cf4b336bb4b72ffdac. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USN9M2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x708913b5f03188c74a1732568d96b0411c90ba615b14fa28ce4d86446bc57743. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T14:09:34Z), 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/USN9M2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff699b8276047cabb149aec0000b8e0c1a2100b89bd4ee45e04427c0d3dc818f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USN9M2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0db21f55478b3b7d908e384d19ff2bab7b15c3be3fa0801ca57495bb1c3f4d5. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USN9M2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9e51bf4db5cb1509a23e3feb41dd613c4e329f7bc9d09f733b6e772a642ca9. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T09:05:27Z), 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/USN9M2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e1b51d4c0b7113001de24821a66fd9fa7bf13977902c380c6340ed7ac17b265. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:56:54Z), 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/USN9M2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f4bdba940b9b9192b163c4d3b46678ade304c8b7c135da7a8658ea97f0763b. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T06:48:16Z), 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/USN9M2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb075114193ae42dc3a8244bd98cb327aef45b173288a598b081ec7d7b49a022b. 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/USN9M2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe78da62d92580950af2057c380aec2d7ea0976a955767f44d257f5656faea2ba. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:58:29Z), 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/USN9M2400017.