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 0x45b1350868e2b21d3c536b8a4713e417ba279703ab44fb180e894eb6614cca0b. 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/5c4a6b51-d78f-42bb-82ba-076807c91c4e.json and https://artists.proofprofile.net/proofs/artist/5c4a6b51-d78f-42bb-82ba-076807c91c4e.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 0x4307c0856c9cfd41684ad459b695df79ac9ead042915329fbdc8c2d19ab8d244. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM91060486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90650cdbe199091ebfe67afda005db63ae7752cceba7257a8f616d5280a4745. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM91060490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a32cd99faf1d28d508ca3c6d670f24f01a37d2edc8b1d3f21ba3a221e582496. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHM91060493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330a494129a577fcb86f1e62a3aae316eaf719e07173d7ee994ab7eeef3b63a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USHM91060495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a46704d3f91550f41d4bbbf39ce2eb4328a0cfea74354bb0c3cbd20d5ca154e. 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/USHM91060497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2305a31ccb1edf738665bcc644e7fde52d00ffbedaa941cf2b1aee68a38ae42. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USHM91060498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947829ca0a26bc7ffecca3c9db692bbf35c35b52d5449c32bda3143953485ea7. Chain 2 (Bitcoin): anchored in block 958654 (2026-07-19T03:55:30Z), 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/USHM91060499.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79233943d08f94901740ae0400a42f6e7f78c792b46434bb7be5a4a4d6c4684a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM91060978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa98eb796c7fbc1047a53722dd8a1d0fb3b48bcdaedcd4a42c788a2350e6be854. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/USHM91060979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ac8674eef591174c9eb320049e2afbd55541ef7a241c06e93828eb99a5eacd. Chain 2 (Bitcoin): anchored in block 957663 (2026-07-12T05:58:46Z), 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/USHM91060986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925acf592dbf4af7ef26defebc16637bbee2127bf7a70fcdf2d36534d392415a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:41Z), 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/USHM21155771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e697ffc4e614aeee9cf5c8b4b4f2eb11ea490c81a0eaf2ce071d74825754afe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:24:29Z), 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/USHM21155773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fafb8ed94a9022696fa59c8873c917bc2fd94426f730b66f03446adbb0eae9. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USHM21155777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16ab90f0833bf8d2de9b787c5d697f91902ca1a6e9828a489bed75b7b18c10f9. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/CBER62400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x156f7ad064cce8f8dad72dc5f395ba52950ab32f5a68c19dc548fb87db6d0b58. 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/USHM21374594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e3a7c2dab32074d75e225c0e1c559ab36ae5a67936f09edc0548ec8d13dc19. 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/USDY41667913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa274eb3d018f14f9f2b91269450fe630efc71570d72d8003d4cf4f6d9174fbc7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM91057470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd488f389c5ccfa941b72cccdcc87694ef2d0accdc4d585c756394d6e1022d96. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USHM91057479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c7972528897bb5e6bd1ed58efe35ef7b854ae9979351144658551e1ee11f5e. 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/USHM91083206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c196cdfd767d694c0fac6689ca2ab9655a1e044592954a7554ff930c955e9de. 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/USX9P1004035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb826d3b5163bb473a34907393c55c61edc44e2f8e8f112b5e0cc1ac682d9d8bc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM91057488.
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 0xe5233d444e8b290d78e74f325ae415f720aac19432e154c57dd8dec6ad341b41. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USHM91076038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940bf6c8924e623a26fefd2fceb1f6a2bf0d5ca79519ad78fc65664575865f81. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USHM91085520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1289a848309ccac6284c1a9c74b641c6a85abff778fcdc43091f33408415fea0. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USHM21155088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb31171aa2d2e06c4fd40c7292cd0433c943a55c755eb0479b6ed3be99127b6f2. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USHM91073354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa991677b7226f67e083a1075c9d6fa58300f2b3231019950aace73a5716a9bc6. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USHM91048419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3955d3c28ae3d68dc985ec6086c22392e2e73a58064ef93c7b09805505ccd550. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM91048429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c112d27f2eede67130355984a0735923d0618a7552594e728464ac843f22517. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/USHM81446146.