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 0x54ab8e89682bae1e1d21a4df64ab004448dada297376ba109f7e50d3c33c9fe6. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4cca04b7-8b0f-4eb1-a556-4cb57f17795d.json and https://artists.proofprofile.net/proofs/artist/4cca04b7-8b0f-4eb1-a556-4cb57f17795d.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 0x2aff101b5832129762c6701c27fa455a6b77c03b0b2a51cd99eaf9ff7013835b. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKXN22580781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32e6f8a5e9f8f2f2197cb7b897246d9985a0d7bf74b9c3902b2f687e10de5b21. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/UKXN22580782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x281893cd3e4e1e412abfacb6097823ddf4b94a791a0a44a75b29aa9fda080464. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKXN22580783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f9efc4ebdd8b35988adc598c50fc59d3c23a53bf08d1e886b14e5926615977e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/UKXN22580786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670a7086e2dbcfa87af7a154bb981e1eb8fc5b56e4a32b9197e60c9f10909f4a. 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/UKXN22580787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd69dd67165f2a4bbc1d8136f8d4607526fcb7f0900c4d6e5666efc1b306ce59. Chain 2 (Bitcoin): anchored in block 958617 (2026-07-18T22:07:13Z), 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/UKXN22580788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c9915ee1a0ad533f0ab754245d69a7493f6652d9e1660fadd4b99c7fd53b09. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/UKXN22580790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f1cc2b65802b1e964a7d274024a6aaae00235f8c1915df44871cd053149c4e2. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/UKXN22580791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a3a83213a319d2fd72f350d43cfe9968d81fc152a9252fd74408accc043536. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GX3Q92590087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39ae32f60140dbf7a69dfe1ec951176ee946fddea95048c3d816282e3e8a6ef7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:35:45Z), 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/GX3Q92590088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8395e3d6b0b51a01d03092b71265d86b05b61e51e3b381766cf535ce6cfe832. 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/GX3Q92590093.