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 0x03c9758d0c102624414f4f67da9644b443bd9e63614eddd573ddb0d4e73d5980. 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/5ce8356e-4edb-43df-b87f-166b657fe9ff.json and https://artists.proofprofile.net/proofs/artist/5ce8356e-4edb-43df-b87f-166b657fe9ff.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 0x806170742943b81d3054da64f5ac044dce7b4826bb2859ed857e855ca609e44f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/US7VG2214789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x806c9ec082fe5a2069aebb9d242e4fb030adbee5e02a2869ba0a8a803f8e4812. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:16:58Z), 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/QZ5AB2239688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x137dadf0640cad2cb24e88820a6a563637a91f8a2afb0c24fda28fc7b3193407. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNJV2237090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa4eb79d19199d5c9e25dc937be0fec497ee15f800919e30d42e68e5cbbdcf7f. 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/QZTVM2213443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2165dee7d4e817d777dee90e5e9534d339c84f8b333d5d7b12806150b4de1be2. 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/QZW9K2264657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ec7e63671cb8728a036a8eb610a109eb48ac7c2d5e8ebb7e5b8636bbc1daa. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/BKTRR2200037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde82225b3e19bcf170f81ab2424bd8a744cdf47b76ee91db6695b645975d79d5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/BKTRR2300064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb997d5c5d0f1ed9e03ae58c93ba5aa93ee9cbb5149eb8528065b8907be950533. Chain 2 (Bitcoin): anchored in block 958558 (2026-07-18T13:44:16Z), 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/BKB5I2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14f3aab9727e2f4b6673a417d747226975f0edb7e266f4d842f5c648e6842042. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:43:15Z), 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/BKB5I2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94f98a0563ad79545e16de38a1b6a5ec042597a84a30f46926485eeeb6c187ed. Chain 2 (Bitcoin): anchored in block 958697 (2026-07-19T07:58:24Z), 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/QZWV32499365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6aacadf4b6960299febe348af89ebf86ffe5eade8791db430010ed39b033932. 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/QZWV32499367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd71a0ca0c931354cbaa99e5a98024d47070cd9577675e1d8d3abb6fa382e03f7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BRRGE2300420.