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 0x66700263d14ca2f8a1e2ad599884c8cb17c5f4760cf9c6a0cabc2db8db95942c. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f25dc1a4-2023-4b6b-b0a0-574431b0bccb.json and https://artists.proofprofile.net/proofs/artist/f25dc1a4-2023-4b6b-b0a0-574431b0bccb.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 0xca95b0dc5d8e5874b4d4e4763d9c8bf54243b6c164005262a0732e70fbc8bb83. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2331454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42ecba803c76d76f1167bd66523a13f57932ef61e53d9159c1a03ee91392561b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZS642243126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90d56683329a33bf0f41950dd58e3d81efe5a32352352ed9b41ff91c1e335aa. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NLDD62300266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4944c3e10b6642215b8f2d25f4c2632cb2aa0d4d3195d0ee7ded2c1c8906d19f. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/BEIW12300322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99961ac20402b9d2ce7500df2e17c26d0c33cc0b6cd7c78e1c5798c3873f36b7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWR2338643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa734f84d066a2caf0ee73dc62cf027adc4081f39a81c684d15520b634388c9e1. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZMEP2389894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559586a34702cd5d669733b089cbe810f03d9626ae0381732296514a29006672. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BEIW12300198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb717ee4a365942b32c8e9e8a537c09d782892d4ee2f02af57b3805c147ad291. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/NLDD62300033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x465389838b941302868b14aa6f465956dd91276a961e204e058720bb1fd521db. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/GBKQU2286427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x112d9df644e04c1bda97b750a3bb521d2fd98ce1211250d37b98ef92937653ac. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBWUL2241525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc94d3504eb825197d494446171a2268154b863f741c5f9472ca5ed58ddc7bda2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/GBKQU2228622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f68883122ebb5b257de90acc900b2af87636e58ce86e0d8a7a8f8ee76831cd8. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/ATEK02277014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8e97f60d91ef2715cf934ac3f94c44b3f2e44d72429595643f6c7036acf0053. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/ATEK02177319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cf96d0e2005eed8c2336d37b4abc55e98a9afea937518b5c6d759c0f406360e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/GBSMU5835116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a79c195a46d1ee9bdd15b276295c5f37cb80b591aa3f4df4b5f3602ed9bd64d. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NLQ8D1800017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4549dac1000c795e9dc14e7be55a9f557b57abc37e49bf18745dcf778ad71f. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/GBKQU2454544.