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 0x11c68cee2bac2dbd0d6ee7c0ce3fa9a618653d8543abb861c1ea51abfef8573b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/65305d6f-28b6-4572-90b0-8a2023ad9815.json and https://artists.proofprofile.net/proofs/artist/65305d6f-28b6-4572-90b0-8a2023ad9815.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 0x732a79fbef972696ca9f563f533d968235e115e32678dd5a0a362c4c4c19a612. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/RUA1D2503461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb598b36e5501a0cc787776c7047b71e9e12ffe2f0b26677583dc04e48090563. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:38:52Z), 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/FR2X42579709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961b5fd038b47e9e4def178ed372c475346ec77789741f204f655446a5d2dea. 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/US3DF2525956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5da97f512463749b63f4c6823b6895ef0e7db24798311721e42605a0228964d3. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/FR59R2558228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde7a3d6202f4cd6e10531f6c10ee0303ea82ec9f82c4d9af1e27d3d69c23997. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/RUA1D2529020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41c5c2ea235e4af051a05de65e393f39b46478723fe1006d4d7def4fd3bc2c7d. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR96X2555118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaad05237fcae97e6b629a3896294f175958daba74d2ee3aa4e4940cce121498d. Chain 2 (Bitcoin): anchored in block 958800 (2026-07-20T00:52:19Z), 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/FR96X2567177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac8917902e554e20023921f18f6bb7290d8af172fa074cf8e926151d16eb6ab. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FR96X2567178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc2689f2944b60d9e98d64db2ac87ab70e10a50ee209b9ce3dd542f35e3c6535. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:11:29Z), 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/FR96X2567179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71bbbc4b7ae6e3fcf5a295d6e4114d4520746fcda4c09c48b3799a4ced86fa8a. 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/FR96X2567180.