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 0x05c56271fb07f8e8a8c0234feaf5110d69b3ae8250510f4aacf820d7cea9d08e. 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/9285a1da-e581-48fc-a4d9-11f6871aadb7.json and https://artists.proofprofile.net/proofs/artist/9285a1da-e581-48fc-a4d9-11f6871aadb7.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 0x6b931a6cdb21dc466ddbeb3394a6f2e2ce3fa53bba7a9901e9d3e1baeb954719. 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/QZJRC1950840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ab0c38763d6d3403c75600ff5980cdc13ba4a0018b458c596ec54d9e94f196. 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/QZJRC1927392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74853b709ec05d8298ea96b73498033b51564b422a9d51ebdb4083fc8f0ff21c. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T16:58:22Z), 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/QZJRC1917231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40d352eaf578c623e7f4a4f2d0d1a0cbe613ab04ccec7499e739ce23317c6e3. 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/QZJRB1989688.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40df61d7aed6a3a13956b69793cd6b32f686c87b9da4d81ee3891407a268bec2. 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/QZJRB1980683.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb90058bd22f97f8043ab90a586c0713ce5794dbb8e1770ca2d11270793965c3f. 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/QZJRB1970543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cf08fa4c8361352c0e9df9bc303ce341d174655a771c2dfa51cf5053414f826. 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/QZJRB1966519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b4707714e679acc488cbfd4805fbb4051944db867b400f45ef6718130db236c. 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/QZMHK2012356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0341f74599f7a79637c9b13c86d8b9d8d05b4f1d31961a5bcd843f3fa5bb65. 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/QZKDK2032775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cac2a7cc194b393beb42e0ba0a468b4153c1ae3792d4235598e7648a6a0222e. 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/QZKDK2088066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06de3ab542fbb15311bc55b1ff8ad95965bb52bdee41f5a7cb89f5268e2f5383. 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/QM42K2018540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86759fb95f29584fd7cfd45149887917d8a54bea99d02bd9a410a85ce4720baf. 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/QZF8N2075831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e301a964c581b9472658990fe92a8c66e7c856ba3a0ee35cf5b78d31ba4fc50. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZF8N2024200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf48495215cf5164433666d7714c3451c9b2aab30f3320a3cde0b0f31808f42e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM8DG2039172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15d24e61133b858920d323d9ea3a9e2f6009897dd06099ab92ba4f8b733006f9. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM8DG2001396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf34516108017aa148a3e42456714667f8c46ec8e567dd6a4913bcfe27a071879. 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/QZMHM2535293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7de362656b723f67eae55bc430441a9eb2d036db32b5281148703b4040e1fcaf. 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/QZVEM1876329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e203172263dceceb23c29d1705d21fdb09fbb29269d8892e552742d0358a325. 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/QT2VB2497665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9b2d429ad92f6e83874eff9ce1c53a9308779f45c7d25a0aea1bb2eef063f9. 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/QT2VB2468879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7e6816e8a5659f5e2d19a3e3bf51f1d3fa19b01913ea046048b62f7bc1c1b8. 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/QT2VB2438672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7395f83598e9ed945bca4258d98f68246d76e31a71d1bf235a1d56a808c96879. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:20:02Z), 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/TLVEM2473445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b2be1dbe40e20853af9a1a3d75311aaebdcc151a98ba61920ea7e38f9d3f0. 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/TLVEM2462369.