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 0xa758e55cf924a3ed3c129faf92bf8373726c3b0702b940274ac447c269e267a0. Chain 2 (Bitcoin): anchored in block 953741 (2026-06-15T04:44:49Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9fb8e495-074b-4606-a7a9-c25e04047b0d.json and https://artists.proofprofile.net/proofs/artist/9fb8e495-074b-4606-a7a9-c25e04047b0d.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Tan Triste / Desierto De Sonora (México)
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 0xef117c1ee44c5a92ea5968020ea29bce6961a09c5d02eabe38d1c8ecb07db6b8. 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/TCAHU2473497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82f6d6307ece466426ce6153fddb4afe3ddf466ea99f96aa6e685715710c53a. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:54Z), 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/TCAJD2433447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba1b3fa192313623a1f2d4f154c0c809b39d4d904080024e2494cd967a2ce05f. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/TCAJG2570596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d2d0ff077a51a50be457100b87a001ac10aad62db0ce82b5010a3c0d1e9a2e. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/TCAJN2595183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82f6d6307ece466426ce6153fddb4afe3ddf466ea99f96aa6e685715710c53a. 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/TCAJD2433447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf128872f7c71101ce8c970772deb8cf2dcdef7d73aafe2e2aa2aee123d596be3. 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/TCAHU2473227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fa9cb611ea6697fb6e74da52fb25f286030d6419b26210272f301b71782a6a9. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/TCAJX2596616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4b9779865b00490cc38254c278b402da1e202931600eb706cd534f25126772. 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/TCAHU2476820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf13d90e57155c73a1e30dff50fa58544487bd79bca1119963d9887f0726e9ca2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/TCAHU2476736.