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 0xd23c1895802d4131636b852615541519b03a64d8f5191fdcd3838fba5bc5f40b. 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/e48f7630-8c43-4331-be1c-153d7719a6f4.json and https://artists.proofprofile.net/proofs/artist/e48f7630-8c43-4331-be1c-153d7719a6f4.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 0x4edf1eba437703f8ade887b5269c39627c5bc31dc37a181116a6352103743cab. 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/TCJPI1806255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd14ff4ffbb10831286e2509094c31df4c0ed32a9666dcd5404d661aee6e2f40. 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/TCJPH1836544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf6f4f063d57215aac8495288148127533feac2c12e5be819794cc49e6f2c8d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPH1836546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3747b2e4cbed804461eee8b6eddac0b764d96690f95e5805d7cba67a285d39. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCJPH1836548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c6fdfd2cbb9eb78643e2234c2afd6fdf3617619609d2ba4c3ab9bff88119357. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T09:04:56Z), 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/TCJPH1836556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093d85f64134c07f70446a669975e59ba5dc1d422ea0d0503f283a70d9c0b242. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T17:03:28Z), 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/TCJPH1836560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0047527dfc6fefbf63c17ab438fe0be890f266b0f75b4cd362fad07b963f1944. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:55:18Z), 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/TCJPG1881697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4928e32e9cda775bdd236a26e8222c22b8d20eb816aca657a2e5c31267b9122. 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/TCJPI1948401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb58b43b187bce94aec562ebe97cac0cf9870b085dc55b8ae74593c0c47080a. 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/TCJPI1948403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ec1b4c2c67097854aa2b94ca8598b3879dd014c796520050ecb0d9abc2a0d74. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/TCJPI1948404.