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 0xa9d232f2ea9d977a7387c8b36fb05416665793bca42d1ddad25dfc1ee98a8ad2. 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/852d3111-d946-4d7d-b6f1-ad157a71579a.json and https://artists.proofprofile.net/proofs/artist/852d3111-d946-4d7d-b6f1-ad157a71579a.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 0xeb3da67ac98574dde03e5f1c2302772bf21db86ed4c9ad89961ea236b440d9ac. Chain 2 (Bitcoin): anchored in block 957751 (2026-07-12T20:41:42Z), 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/DEZB52450126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e6a9fb473a85ab262e5bd275c5ac2e1690a8fe950e9f2c8891edf8e6b6c0773. 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/DEZB52450275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62186030dec44f4ae5469eacc4985a64ddd1d2aac0e8a5efb3b4238c3102a5a7. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:05:48Z), 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/DEZB52450276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817a726f481e33c0e61dfb4c105482324b2d9b26a0924863ea2f7d075c53b897. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEZB52450287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f34b81df28e4d49c2e87d9ec1891e93459e95bddcb91401ca53224e6e112c1. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DEZB52450291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd45f995a55e65c9cd362a4ac02af2e8f8089f65d7bb3546fecb54b6bf3281e2. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/DEZB52450292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ff54f5888a39fb9130237e61493bc375de718f7e8c723ee15afb05bd8c4a5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:47:50Z), 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/DEZB52450293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ace9b1b2150c38fd702ac0a0b9381f7e63660d024f056659249a406aa1b304b. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/DEZB52450294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104f69db132cf592876709a163e69a075f60cfb0a375cfcee3a447a115b472d6. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEZB52450295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc6f84fee3c0f92904a5267b470bec7280c4d140555bb127041c9a93bf6ffb. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/DEZB52450296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0135f9778c6a100cda65ebf7e2142529857afe5fcca8b315f2abbee630482e56. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/DEZB52450297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x785e510d96ae30ad83e11c137b1153c1f8a25d82298cfafba16c73af7c790f49. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DEZB52450298.