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 0xe7a6e2f766771b54c853daa49ecd855abd11fb80061f58503b2107242ddcf052. 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/ea8caca6-c9bd-46e4-ada6-39543d1b03ba.json and https://artists.proofprofile.net/proofs/artist/ea8caca6-c9bd-46e4-ada6-39543d1b03ba.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 0xcb3bab40b90490476d4cf551b6d7cb7daaa82f6d1c7466900466b6ab7384e13e. 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/QMFME2390394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed1265269437c412f7b3eb7cd500c618e768b7e489e41c0c7402efefabf7beb. 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/QMFME2390397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4351ce04c6de642ce7afbfae03881f9ccf3cd5fd3c69180069ba18045f8532. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QMFME2390392.
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 0x81934d21a69abc92eaa8252118e3ba566c0994a040b750c878159c9c7ac1311e. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/QMFME2390393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfebba37ad217c2c8a940e7e7c43339ffeec091e65f4a956c366300056bfb0634. Chain 2 (Bitcoin): anchored in block 960306 (2026-07-30T20:23:53Z), 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/QMFME2390395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176152bfb46ca79de8c42fdfb631450f233e195cf61094e3421b17af5ccb384c. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QMFME2390396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b6e4566108d5d85cfb9050cc406b3a8dde997ab83a826e9e3026177ca1ba4e6. Chain 2 (Bitcoin): anchored in block 960339 (2026-07-31T03:13:37Z), 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/QMFME2390398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31dddbda27d27d8508711de4dd72b7e643cad9351aca3f6c9aed1e87897dee8d. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/QMFME2390399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4932325e0e6f1bd9d95a0523a01b7ed580e98b5a928a726869162bd695b5a72d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/QMFME2390400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967df56fbc5c3c1a1c777e6366673e6baa69dcfe2324cda572e88b6b13d9479e. 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/QM4TX2055496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6c85f5c5ad55df611d549fdec8572743e8b3722044884e7f7a125e425676e5. 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/QM4TX2055497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4662199c75bcf613a30876676319c06ab8ad608fab9d9c5e127d3f959dbf6c9d. 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/QM4TX2055498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d90f6458807cf843605cfe93f69bf17dcfca49362ce1e300a592a2144a6888d. 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/QM4TX2055499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc169a3e18c136b73663adc017618ead62c79b2ed811dc332c38dcaafc8eeb987. 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/QM4TX2055500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62c7d84794c5c3678ff0218199cabbcc254efc27f54905cd0db4335f8f1d575. 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/QM4TX2055501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac06bc7d22da938404fa79cae2118eb13291284f12cb7d3df21988f95b28ccae. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QM4TX2055503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e064779c6df786d870951165456283ba99f79b849f936ad497e819a0fd267ac. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/QM4TX2055502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50ab5bbe1c13da351e3af8c5a0fcea766e46d66cf48f7410ab97bfee1264aea8. 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/QMDA61865169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf009ed2ee36e63aeacee4d23fd21e16bf5ed622b913a51a7e99d711235e9af8e. 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/QMDA61865173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaa78103b31d764b9eb54a58f63660fecc742a4dc752ad5e5f4369071f8c571f. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QMDA61865170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cb044f21468efd5ae5854d1ff32b2e050d234915be404655df719ee2531b4d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QMDA61865172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06558c2b79c61025fa8d1b031f43a2fee4d3329e4dc629dc2565c392eaab321a. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/QMDA61865174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8e539471945aa707a0fff6d66cda783f62890d73eeb2fb5bfe1ad57b36fb957. 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/QMFMG1577608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ebfd33e0290b06a563985fe4819c31597de0453ad49f684971eb99b4f0a8c. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QMFMG1577610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e59273727513e15541132a80a2b3fb5c205939e65e5b4ff3639777c531938f0. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/QMFMG1577609.