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 0x03c73469e0445a7bc7cc0ab47413e50a1d7a3b6fbeb13e141434ea2dc41d6170. 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/b6fb6c1b-f1a4-4de5-9800-36cbee166c8c.json and https://artists.proofprofile.net/proofs/artist/b6fb6c1b-f1a4-4de5-9800-36cbee166c8c.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 0x4f97ff0f63561f8b81c19d2457c4d08fce97a55b55850797b6cf73851f3b3594. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/ES5631104327.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22f99cf02b4985e44736ba9f77ae0064cef22192fead92734a1b152b8a560602. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/ES5631104187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd9f9701246a4699f0924bbc8a4920fdc7670cb3c94744f8a2d4a4c3b570ec. 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/ES5631104183.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc07b3f24c1807cc94259bf20844fe9d417e758fa9e7d66689230a6da81b42223. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5631400148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30957c882a5382cdb4e015c547cf28a754e22e0932fd0f74ce1b1806994da969. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ES5631400150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c878768b1e118d9f4443fd50f0f0d936d5806897e39b31dc77cfbaec918462. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:00Z), 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/ES5631400152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64ca8aa677a7d52f1e62d8b393d8f953247c6d1a750d15a5072b5f03649b6633. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/ES5631400162.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03c5795bd8dedf9713d9543837a7c61f87bcce8f66b9171569dee5322b2621. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/ES5631104189.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fd9f9701246a4699f0924bbc8a4920fdc7670cb3c94744f8a2d4a4c3b570ec. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:53:42Z), 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/ES5631104183.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57b9ffb0ca21c026cde56df59237c6f5b12e3462715304cd4c80edbda6d2b0fe. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/ES5631104357.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b47a9795a4f5b98602373ce9f57424093a8c501029617a7c86addddffe0623. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/ES5631400151.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898a2e6d79ce54f86ca27889368bd42499762ff89514d14995c27fda79d38fe5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/ES5631104210.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c5eca41412d489a13b58d51c096262812f0025b926357e0f1fe80184744c04b. 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/ES5631108472.
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