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 0xf0b38966f507220ad837408cf38935b48a132f706cd655a6501f87f62eddfdb1. 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/5f6275f0-bec8-49b0-a869-d80eec32112c.json and https://artists.proofprofile.net/proofs/artist/5f6275f0-bec8-49b0-a869-d80eec32112c.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 0x39f86e9a1c14846768fde1226f07822caed075274dcf1f045d1232ae02c55ce3. 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/QZMEQ2146533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c718a6c56e1d973d7a148ae696435ce398d1af847150a80af7312230452844. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZMEQ2146535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b0ebaadd6f4d97a6f96f193eff485a5955c77fede2b497e3488d88e863479cd. 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/QZAKB2167544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632136adc23dee159d5fea7ddccbc714f9e845ecd2ec6c3246395d28a3ca778. Chain 2 (Bitcoin): anchored in block 957620 (2026-07-11T22:32:56Z), 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/QZAKB2167545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaccb48575ab4c9d42a73316f6c733241b7f7c72eb5a0662017299a7c31d8cfe. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZAKB2167546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e81675e6717f3bce0bd98767ebcfabf65bbaad310927eb610d16d23b1a7fe6. 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/QZAKB2167548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee423bcc7f0da92d497f4b4821145a9703e36bf4d9c24c6e416659d3be956f6b. 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/QZAKB2167549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e22b0787a9637ecafce816680163926ff894bcecbfd6f7bd88c6bdf7811c9e9. 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/DEXC82200078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d11ef629c4f9225ddd8428501f6d440009f6a7f5e2e89cfc5fe3d7d7129413. 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/QZK6L2402568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31855bab39ade5ecccfbc62dc1974ed6fc81c84a3d489a57d87cb0f5d3130fb. 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/QZK6L2402569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a74138af402d6fafe7e6b6662d45721cf1d4ee43ddf29f37c0a8a6a786cd9d7. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZK6L2402570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e3bdff788c6c2259d50e7130204fde401bf19f642398d04d7719d5a720371f4. 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/QZK6L2402571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5295a95c8446bab2cb4f696999e1d931145a0bd02c1acab621bdba58c29190. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZWFL2394670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4196581233488807df31a259e8ba3cdabb32bfba30ef4e804e2da7a0bc7b13d1. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZWFL2394669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bcd135d3bd69e9d382759b4a9782aef16f27057a9b697bccc148d242564592d. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/QZWFM2443805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a9338e5634e6131ed5f8a8697e8f2db21ec711a7ae9bae92ca859109b70ff99. 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/QZES52504845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe6709fa849893f54889f8a55db7ea03b36cc6b1bc1e745e5c36c5effbaa08. Chain 2 (Bitcoin): anchored in block 958106 (2026-07-15T05:35:13Z), 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/QZNWZ2521894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe69298694f2d28ee459041486347e4f215c65aa67d3f4eec514aebcbc972990a. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5KR2374993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8146af095294fb93f26d433f0073713ee411ce7316892ae25f673731b77c924. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/CA5KR2374996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a637872764387a2fc66ac3f6800696dfdb90003da6a386430f6ee0bd337e6d4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZTGW2400147.