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 0x710922754e6405b18047294fb06b50e4248b14450f6b84f3e6bd52a58dbd14d8. 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/31624f5c-5a27-40dd-b921-d4a9e29fdef0.json and https://artists.proofprofile.net/proofs/artist/31624f5c-5a27-40dd-b921-d4a9e29fdef0.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 0x413ae62ca0b788e55bfd9173979a2f4bd1c61933f5adfa2f32e2cc3e2dd9f68e. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZMEQ2170709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef38abcfd3d97515d32c95a4fef9cec7390801e9717bde6d4006781bc1cc93fe. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/QZNWQ2142910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7054b3b62b1017de88264effb1ab055041038dcdd2cd7cd4873ef34de25ca37b. 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/QZNWS2106666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cb151d59e21d19be9a028e07098296412ac0b8aad4a61d8667182d37273d1e6. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZNWU2122730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b119506da3d308cf80fc2b51fee07014a5bb0f3ac55db5fa9b31075c361f80. 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/QZNWV2150519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b62f71894d5e5e8ff056ad9d76e4fc38db396fc538a9d5f1dd2ee2152265932. 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/QZNWY2129708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1323989a94f3b7f8b37e980a19638443a47929a18422d75d2316889ba83e32c3. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:45:16Z), 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/QZPLS2153096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc53e214de5f2dcf00b22bf93a2f125548bb1482702fe5a0e1eb80c6fdeda5abe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZTAS2128282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa2c9034e3848eb681872b3892430d6788888965e4d6ccd8ba3eef5e8208e41. 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/QZFZ32266059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6791840f570bb6af855097880ea0659c2ff3b8d569206549a6bcac32f866c3e9. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/TCAGC2233861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141846289d035184a02e196ff7b25a83004f4181c739d60f1505e457f376ab4a. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/TCAGN2210053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf80b004c90b27606a3bc0264a919e72461d5b7d7f674df8756ed0c51d82c3f3. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAJT2579730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ffff30111f7b930d75368a6e294cefe6f3637a4686737f4915b5fd742c6bb. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T09:44:40Z), 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/TCAJX2567188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7af2c3bf15b8e114673aeb765a2a37121aee21396a51963d26a0bf6e1e45407b. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QT6622543040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0250e5539c539f8daec53cf589fcab39bc2a0fe5bfd96276e9ea1467665600f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAGB2241278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cbaadb4352108f97c8b6e17f826732e607aaf3d26ef59d89b3e46323d79771c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TCAGB2241324.