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 0x9536c96fbeeffcca41a9d0d6d000d6477515b4f318ba2da4605294f6d5288c18. 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/df4d5e8e-9ab0-4e4f-b238-517ee623b2f3.json and https://artists.proofprofile.net/proofs/artist/df4d5e8e-9ab0-4e4f-b238-517ee623b2f3.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 0x79e6a8113d7bd9aa56dd3760403fd176ec6902f9173beee40fb1645cb9923a75. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTB62218520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e9ce8673058dd92fd63e3cfe427160cf32435ef7b9af7df2d31697bd66f943. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:30:55Z), 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/QZTB62218525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fbacc71e456c6a69c45046e0384d537a4f38f3599a3867ed5c8c766bed202cf. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:46Z), 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/QZTB62218529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccb843e825dd8d2c7ec71b7f447b27c750305264eb6f2e650908b19de54f6836. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTB62218530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1a0816e7a8e227ee393791fc99cdef983b8722ddda9c9abd5e88630d49cdef3. 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/QZTB72213000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc605469c36c15d7f85e7ee57026ea89e4b25a28787ee7750ce547786de2725a2. 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/QZTB72213004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6d8016376924b9822c4c4ee075cc5bedc0abd6c6a71d581d4043b85a81d7d7. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZPLS2472285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7d547038fb9577120f734b6ac13b73febb60b003a594b5b589715af070e5d4. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:15:33Z), 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/QZPLR2492128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35d4861321b04a66892605790b6efa7a07e00b3f40d7197cc13d417fdc7a784b. 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/QZDA72527885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28bc316d7e4351fbb8fac5ee8d07c2fca6e61ce3e5f75775893540e211122f4. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/QZHN82519355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06df249a323fe270d66606c9aa23b559b2cc24853e68c8aa31e9aecfb101343d. 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/QZTAY2576453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30ca51dad9a61cd82e4379200f34282526ac6d56240758e94f6205392e0b58c5. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QT3F52516387.