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 0x571d8f8ac4177105d8a3175c32541c937fea6c58daf1e97d51f714eff654d5b6. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9effeac1-b619-496d-9d84-d98e1e27b650.json and https://artists.proofprofile.net/proofs/artist/9effeac1-b619-496d-9d84-d98e1e27b650.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 0xf6fbbd7845c5a92a0c72ff74656d6be8aaf98acf50fee079ddfcc79f98f9cdc3. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:58:15Z), 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/USHM21372439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a5d50078b382570d15db8d3f8ec4d1cbfb8c1bd72156d0008000389bd92b8f. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:04:14Z), 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/USHM21372440.
Eli Gerstner & the Chevra: Sing Acappella
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ff4cb596e09c9ae03d71fd4a352e4f99d39ecf1ad1d15748e26b855196cc6f5. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/USCGH1383829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5066257961e52774eac92a9cf695d97f3baafb7093f3f2e449fe84e5da90210c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USHM21376121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0422aa63a7597ba241b1a38b106d5e572a0dce971fd7f2fde254775c55a1e8d3. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USHM21376126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d21d1a8245e96834a6fd88b71e671e836d64c31e55c6aacee35c0858f307f1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USHM21376127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2abcc1d13a310023ac9b20c2e7941f9ea48ff61bc9746a20e273f34c88ffd045. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:21:53Z), 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/USHM21000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ceadda84f98b95d04c235d713aebb3e0c5cb5372ff780a37208a9f9a5e3a37. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USHM21000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d48830fb156f68add9eace5a916919ec85b745892f1295a906f89e152290183. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:48:26Z), 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/USHM21332305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5940f2f728012c5b5c32d28b2bba14c86725da38f489863a3d37791481e6ae. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/USHM21332311.