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 0xd697f403a5e7bbb139cb52aa404301678a9acba269a0fb46f94606c1a11c87a3. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ebbd9c3-c3e3-4294-bca0-772d3749916f.json and https://artists.proofprofile.net/proofs/artist/5ebbd9c3-c3e3-4294-bca0-772d3749916f.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 0xc05c26f088d0ad34bedd24fd23d69148ee0868004b80ae557e7c4314c1a50ffa. 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/QZGWX2210062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc56faea509f50cda5bb10f9e53917e13ce817ff45163f244829fc99dc7d5b909. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:06:29Z), 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/AUXN22195077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c03021fbbe6774d1423aeb246a9b15fff446cb21aa18dbde9f92b4fbe345bf1. 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/QZDA42284587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56bfaca70d1a253666055d5d290256ce6c5c8751c31900a6a7a2a5f85e45e4d2. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNW72203759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x842a60b642c452d993ce20d0d91b279b26752ae0af1405deae597d3b06cc299f. Chain 2 (Bitcoin): anchored in block 957767 (2026-07-12T22:25:13Z), 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/QZNW72203766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c92ff6db1da26ca2d230abea4ad418b9ba2e5db5fd5a6efad26869d5d2e346c. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNC62103878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86ec34db66cb124a8b0cd49be527cc4e83a0599866801866c0a064e1935a2abf. 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/QZDA42211649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb61c1967dafa7255afae6f30f47451e39e67824c88a3fc36941670d757acb596. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/QZLL92405233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf276af3eaa5d16411b6f4ea4fb42ffb474e1d17734a9bb3b18c192b1b3c9933f. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ESA012417011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7aeb386762745bb648745e9b8e0b21a5a7f0d86ac404c943ca35a80497da45d. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:59:24Z), 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/ESA012417019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5aa92953df22ca817e22d00eb0766e0c6e98e482234eaf9891133f63fde4fa. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/UKTUY2151951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c16727585e1695fb7ceea4b136b5200ee6b18bb13a1d6a9d830628007545475. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T02:46:47Z), 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/UKTUY2151958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633be00bd56191610e57cc1289b049124fcf65cfea080f89627ec9fb5f0c84df. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/UKTUY2151949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c8f27971dc6b9087ea446c96c8156383f97bd64923cdcd5e03b1f17eb4fefa. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T03:17:52Z), 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/UKTUY2151953.