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 0xe3a46b970873e0f372c51c8e1ced64569ec952de23964ce35d59f89584afa1fe. Chain 2 (Bitcoin): anchored in block 953633 (2026-06-14T12:47:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/351d00f1-b925-4f15-9d1d-b2aeefefd9b3.json and https://artists.proofprofile.net/proofs/artist/351d00f1-b925-4f15-9d1d-b2aeefefd9b3.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 0x7b22ee467d424fe8afce57ccc41e5f838335e427a5d6560a09b78a0a564d6f31. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZK6N2596497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1b32495341a43062e710ac3286ffd113c1d6f24c589d195fbf5d1a70eeef958. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZK6N2596498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e79e36c2742a9c74cbd0c14ef91e4908c716d58576a11d1390ba41af0889986. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:14:15Z), 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/QZK6N2596499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe9c285f4b870bfedc8210258f7eccfe395d8b9a0bcfd2f6c44dee35b8e83d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZK6N2596506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ffbf2232957a3e0aaa2c3025d41eb05e2a66ba6c95a91a5376d4bc5b73aeec. 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/QZK6G2525180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5de782dd55a25450bc257ac48c9d606bcf8ee6f2144fc0ff94789c63475379b. 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/QZK6G2525181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25c8bb618f0fc345950aa568e8ede901f86266d4d71fa2681236f09dd329e3f. 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/QZK6G2525183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2019f0087a20a03b2b4b7f6e72452b42f9243cf04b8a9a42ce3220a9fbba736c. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/QZK6G2525184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcacce314985722d03848dd20c8097c069725166e6e5671955293cfd817cf2778. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:58:27Z), 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/QZK6G2531473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a33f32430129d2a6e9ac2852b8e383e99cf85494e6a382d04220fb249c6ee4e. 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/QZMER2572288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72560890d42cbbb6c5f4ca33a09aeb4afe6df5ec3cfc0aed10b904ea77cdbeef. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/QZMER2572289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c4d5bdf0a89719c38f802cc169f798d141bb96a054d3dd2eecd628046ad7fb0. Chain 2 (Bitcoin): anchored in block 958798 (2026-07-20T02:32:50Z), 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/QZMER2572291.