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 0x4cbd95a456c5716ee39d76a9aac7d33629ba3509779fec66be3e404246eab307. Chain 2 (Bitcoin): anchored in block 953630 (2026-06-14T12:06:27Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2ff632b0-3f1f-4633-8cce-9c133bf0b545.json and https://artists.proofprofile.net/proofs/artist/2ff632b0-3f1f-4633-8cce-9c133bf0b545.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x9ce9a6f1938c47dfcac5e294c99d834efc1705557af54c95b4b3ffbb5ecd42db. 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/CA5KR2156449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81d73321c34ada559d8dbe1460f0dc26fac7d71706eb7c9539ee682d4a463a57. 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/CA5KR2156457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3229df71cf7b6d83c9c8f89ade3ed1a2cde7bf35ac36979789f82f9b26322d44. 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/CA5KR2156458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d27c714b1c0f977ee52eddce166c244b3fcbaa30036a13c7298935387ca49a7. 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/CA5KR2156459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98e6bb70ee1c3819347206f8fcccfd04153c2face4177d350f2b05ff395095cb. 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/CA5KR2156460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef4de2fd8c71d7cce552955d0b4ae023cf875cebb2d2f1b132b08ff3053d101. 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/CA5KR2156461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x572fbb050ece686f96577909baadaf60c32b9544c2138c8025ed63c23f0c2505. 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/CA5KR2156462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f13825a7e4bf889bc1b81ed0d382152bbd95e9cf523f5857f0462433c4a8d6d. 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/CA5KR2156464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64bad76147cf5e2754109da527faccf451bea46191523dcb0a776fe1f3dceae0. 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/CA5KR2156450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967dff39fe8ffe7fb4420e00175263df24bf08f1e4d1225ee4e3386868834e2d. 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/CA5KR2156451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43470e2b6622a0f31aebd21ebfde5c033d2e38fbeb2603b2722bf78ef5e19667. 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/CA5KR2156453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35cd30a0c7d10ab7da555d62de96762d128952562d1e7f6d85c78c3f9256dbfd. 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/CA5KR2156455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe32446a80fd23f7868ee9a6efea22004f5787f25acc983904f77fd0afd2b8b7d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/CA5KR2154937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a5d15e2a43f1786d774a2c0782dddd4a34ff579e6a1c1e49a951e03634e8ae9. 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/CA5KR2154952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x558dd74203b4ced3251a7c312cf6b227873e1d43d7efd21c9278ba338176a8fb. 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/CA5KR2156463.
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 0x3c6a9f74a8f4b2614a4030d6fd7e6ff59e578cd251511aee180b67c71496a45f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:07:25Z), 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/CA5KR2156452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e19d2de027138382226b2086a129cfa66b3086b22d1524e7bb0054c36e39a7. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/CA5KR2156454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b330fe5e6b2a91276505f004c440ed7a4f5a9743ee572a15b4e4e9164b17d6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/CA5KR2156456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48bf33d4c29141dac9b3a12fb2e097ca655da18a5a25c71f64268c6e0a68d085. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/CA5KR2154953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x610d210a0103ff02cb22928bd2931b6c55e3fdc8337d42e79d0f9fa5191df190. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/CA5KR2154951.