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 0x5fee16840e84e23040ab84db9b48acef3f70f07f679ddfa74741ae07df7f4444. Chain 2 (Bitcoin): anchored in block 953807 (2026-06-15T16:39:18Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e66cf3cc-8201-483d-98de-86a832a7a048.json and https://artists.proofprofile.net/proofs/artist/e66cf3cc-8201-483d-98de-86a832a7a048.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 0xd2b5140252dfcfda8f5e4aac9635009a80f199207543b4c3a4273b18f4532bd9. Chain 2 (Bitcoin): anchored in block 957771 (2026-07-12T23:27:28Z), 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/SE3RJ2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b5140252dfcfda8f5e4aac9635009a80f199207543b4c3a4273b18f4532bd9. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/SE3RJ2500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba92262f6c5c2b2f8c275497b0635785cd78242f9cf5bf6999059854f08e6583. 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/SE3RJ2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7ff6929a054e0287ac6267f8b45b5bb2e2612bed09b666e1fb709afd43c16. 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/SE3RJ2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba92262f6c5c2b2f8c275497b0635785cd78242f9cf5bf6999059854f08e6583. 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/SE3RJ2500202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754dc53ea3ae7c7896f7ef3cb2813de20c2c328d5eea877554a1ecca9923a683. 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/SE3RJ2500206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63b7ff6929a054e0287ac6267f8b45b5bb2e2612bed09b666e1fb709afd43c16. 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/SE3RJ2500204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x981e34e83ca8d9ce2ffb82358e0b6f5aa1ae5c7470ed52ac5a0eeba7fedf4a3a. 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/SE3RJ2500209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09587b67cdbabaaed691ff1b5052209f83a0c5322e5cb0eb58f619dba0975666. 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/SE3RJ2500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb926fffc2e79189feb3b38c9c1ec6be4839e43e62b83628db9b444b34baa3e0d. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:43:12Z), 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/SE3RJ2500208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8576bebe81defb6272563694b74428b01d8a7324ab014d0b64c0b425dcd0f565. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE3RJ2500210.