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 0x83777563686d9f640bab4a52066d90ac67b08887cd7c01afa594379c20c78490. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76bf0c06-025f-4574-871c-f468044df104.json and https://artists.proofprofile.net/proofs/artist/76bf0c06-025f-4574-871c-f468044df104.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 0x4c644af1bc14bf7c690e45ad30e5891224fa219ba445344ddcf29ee4c76aade4. 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/QZK6G2339572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9009d02462fb61adcac642e45479ae91f87f1ad99d4071dcc4b238947761a0d2. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T10:33:09Z), 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/QZHN32566877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdab43851eaac300da6c5be3d2cc3cccdbd6959ceef91bc468a1e2cb95ece37. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZHN32562925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3887a146727cea5533377724dc9261c8a032b2341891201c9ff688857812cf. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/USDM32505801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe35cf6892348503207d49bb49032954fd32266f8183208107d92afe74ddebddd. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZTB22565455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a362d645d56be88946441dc628b33e44b2326ad58fab873e4296b906e0100b8. Chain 2 (Bitcoin): anchored in block 958783 (2026-07-19T21:20:45Z), 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/QZWFT2551072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9353b836f9273d43a2ea67701554c00496b9b8f488a813f48f40b8c6adb6ce16. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFT2551073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83272cdd9bcf8737a03e3e2c01a6bc0e794a7507b6b33f37b417095f3a2f1ab4. Chain 2 (Bitcoin): anchored in block 958870 (2026-07-20T14:01:10Z), 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/QZWFT2551074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16addd5b92ee426598e82fa37197643193a1794fe945b756868466b8a5658c95. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T19:56:13Z), 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/QZWFT2551075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c571b8f53a20243628fa54dc5dd6714cc273b624014f9da608d968e31dad872. 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/QZWFT2551076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd5ae6870b6243da7957ea881eb87044cf296dfd63ff0cedd9f348e11354c2ec. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFM2591341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc8dc5852051a99f6136c91104eccb08604437c670a7b3d6fa19991038ac8da. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFT2551077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f62b2bf62664b77db927bd1af4b443d201b0c834484879614c683d292964c7. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFN2577183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaac2235775382c8c081a0214730074a575d38a3d148cf65e015efaf047884bb. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWFP2531187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x672c486929a5cdde9564d175615e1ee45de8fa4b1da9ac48dcb3f745938a1f83. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T08:20:17Z), 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/QT3FF2567909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e5966e2f2fcde11e15a870cd4ef0034ffaebe69ade0f16ee81263ba6d3b1131. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QT3FF2567910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4958504e1f59f0975fa88cd24c9578f1c15aa5404cc2c4ca4eed75f23f58c1a2. 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/USA2P2400432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x312c2737b954d8a1b0197bfe4a9df1307b818ddf5ef36673d843a9d2af211552. 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/USUYG1528830.