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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047bec3ceeef7a84d3d663d6d619f85f307b8000b1fc560cc443d3a8b1f176fb. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/30b5ee72-e1b2-44ef-b53f-9428654faef9.json and https://artists.proofprofile.net/proofs/artist/30b5ee72-e1b2-44ef-b53f-9428654faef9.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ba29505dbb4f1ea0189bac22fb9a0a0caece50eb186ffac507d8be26bd49fde. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USCGH1721776.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90c79875a4983d6fe261cd2b3788f510d1581c6978c54911558bf5910cb62821. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USCGH1721779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4819a5286a74d99d82f6a24687291f8007389ac02989ade98ba34ffe59e0a43. 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/USCGH1721780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0970f682eeb172cc847bb35de97e6e3997744cdda0eadebfb71be0b64c5e8b5b. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USCGH1721781.
Only One / Christmas In Harlem / Bound 2 / Dark Fantasy
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315e27dd96285ce74f73ae4520312071a0f2f64b19d1e760262b74261740aaf7. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SEYOK1815588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5925bd364a031f629d8ead32fb57041febd4aba75dc922e09689af21a10cdfad. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/SEYOK1824331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7784fc2de77ea3c39a8fb7f275eec448215c56ec02feb4ace1d658a7a0fc84. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZ22B2003832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bfec19b4d092c561351ad46d078020daca96b90b9f53dc2a825fa3b4beb731. Chain 2 (Bitcoin): anchored in block 958378 (2026-07-17T06:45:39Z), 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/QZ22B2003833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4112cef33d20a44f79bd258b3970212725b66d43701d83e1b031f21bb6792fd. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T09:14:08Z), 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/QZ22B2059892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11157c9bb423f1071825bab0ef360b96c97989401b4f59c7d59f942d212d179f. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZ22B2059895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6fee177143bfa39c5c8a611c476bb306bd45bce6072877c52f10e2ce60bf218. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZ22B2059896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3bc99164f2bf8538096af3b926c20f4b44b6888b108ed2c49e9c8d6efdcbc. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZ22B2059894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31845f7b84d3acf7d970d6e5299cf38034422493acfe51a48808133c01fc959f. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/QZ22B2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3bce44639712578490214977980687b09b8080f968d4bd6e9464b8c85a05fb6. 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/QZGWW1988149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2975149cacd8b84c8bc2e1c850c41a815bcb182ab1ecc501cad4cedb2f6ef20. Chain 2 (Bitcoin): anchored in block 957536 (2026-07-11T07:16:23Z), 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/QZGWW2031453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86070e641e9377df4217ff2adac1f461c2e01d8a70665db4e5322b1b6179491b. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/QZGWW2046735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c89cac6d5313dbe4f2b48347e9ad1e6d649ac39922f80985f0db4d55e4bd18e. 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/QZGWW2104598.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799bf3a959792a05fb47095470d853612301df3a1b0841d6645409f02f7b8fd. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZGWW2135849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a187e5808e2f0a702826c781878734a02d98a8bb5922e9d18b11d739613a780. 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/QZFYX2113878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc0730acbe7d30facf8a8b3e600d47a0ebffcef6d5b85c1480dfd15b0a0b52. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZGWX2137181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa626dadcbc32fe6ed6db56fd92bad47f128c3fb379f496ee9b13bc9203feb3b2. 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/QZPJ32103176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a46636cc3909c597f386761cb03ad2b5ecc3e04446fe544756c900ccfae9c3. Chain 2 (Bitcoin): anchored in block 959026 (2026-07-21T15:38:13Z), 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/QZPJ32166261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c50f57d68acd01e6a5a9227948c003ca4f4cfa451fbf1fd6caecee905528cb0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZK6L2226456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64a8a7ab52a950202e05e7c337af184a2d3c9b7e4a7605a9d2aa59bf6c580d0f. 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/QZPJ32207755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ff42cedf3fb6079caef23fb8756798c15833bb59696ce3c0f9d200f2c2ae1d. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32242772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe506c83c10f411384d43f0c9ec5f19f72874445797c32c5512035f1f734bbfa9. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZPJ32242773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf25572820e0cbc9dfdf85c4a8127656bdbb94c26c0ac397006caa8e36c91e56. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZPJ32242774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8fe39122563a443c8692f261e649e77aa87f9718ed632dabb3bb7e2f950077e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32320882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f539d6469ff27e6cb236fea8caa6603c7f72fd98953518759b6835815f82c. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZPJ32338366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e76b86b26d7ab70e1fc748d89b9d4b2ffb89fef73491d8970cd7ea9a9f76923. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZPJ32338367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2181fa7753b667e800bc4d9e492dff23561f33839ec97fc09eb2c8b83a1fa686. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZPJ32338368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3580be5e00e6b97da2422311a3b6ceac63ddbbe45435e0799a831b8f179d833. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/QZPJ32338370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e835ff4de57a95034c7400aff52ffcec5471ec65eda0b3a37a22ff9bfc58bc. 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/GBWUL2172755.