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 0x4e7e03095983659f11c6a307694e5c1887124158eb49abc96df6923fd686d6a2. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/93075f11-a548-4a15-a1dd-47f41619fc03.json and https://artists.proofprofile.net/proofs/artist/93075f11-a548-4a15-a1dd-47f41619fc03.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 0xf1755813dcbab7821f74c326fa8e960e422b651c5a97ef42a45ac4b0961c1715. 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/QZWFG2346295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede83ef4db9075ddce23e54f982c73489a14c5b23de85bfa3f637309e9f7e8e1. 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/QZWFG2346296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db01f570a35ef49caf52452bfab4bfa374f320e4ea96b9e21f07f0fc175d4d1. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZWFG2346298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x090dab46094d7a09a47f714d6cd442b510a839e7a2af69c6ce2eb91a29a1abae. 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/QZTBD2345122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3185e3a3e5e799bf9c8663ae7abd6a5ebecbb19c9b2f0a9c514eb910b401432. 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/QZTAX2364578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab99d995ff966a6ac877e0efca6d2d831747f470ca34979e842097a568bce0. 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/QZK6L2552934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59f119afffdf8e538bac03a44e961b8548a91e314f7b96c005e603a0fac30c30. 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/QZDA52599853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d19f8fe8b0612c2ed6d64dde85478c3f6d527f1e3c80dca1b04f8e038e5fa6f. 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/QZHN82575154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f069622c68b0ccbdd8d9efc3037196ca969c2ec2d36e7f32eabd4f47ed88a2. 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/QZK6L2552936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d19f8fe8b0612c2ed6d64dde85478c3f6d527f1e3c80dca1b04f8e038e5fa6f. 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/QZHN82575154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd0d27964f9d08086f3d6d844a0fc65d5119f364fec638b1f0bd9ccad88cdf0. 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/QT3F32439465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ff58a56751140338e65613ef711e3daa50dfe8858947036ae02fff0d050cc1. 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/QT3F32439466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64cc53c3200d8160aa794c8dfc15a651d46d46872f58c327831249f27c827a5. 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/QZTBA2444065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a4824ef2f8b936602d0bb4d84055aa0eda912d3d3b77352eca31f43b5a71692. 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/QZTBA2444066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf99d8efd8075b985945e74f47d0f75a57add49340d58fd91c9104b2aa003d83. 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/QZHN32417476.