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 0xb97ed91985bdce8696ef36a523353e74b8e133f4860d37fadd876a15dc68700d. Chain 2 (Bitcoin): anchored in block 953786 (2026-06-15T12:56:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d7088db5-8e49-43a9-8dac-9831949b5363.json and https://artists.proofprofile.net/proofs/artist/d7088db5-8e49-43a9-8dac-9831949b5363.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 0xbbffdc35c873ba88ad7c4ea6a5c26ef4e2d23a3d4c62961e4cd28a62149f0125. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITZ4I2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b712d517589aef882fe4bf95e10cda1c0a81573da096ae3a73efd90f2c0a6f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITZ4I2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96f1163f8acf6f81eb38878ff4ed90ebc6cc450cf698e1b5eeb8883cc4c2d243. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/ITZ4I2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b8da12b4193f5f473296b05ef106ae2f6b26ab76687ac3dd2d6faad7ea0f90. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/ITZ4I2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafbdf0d8e5eb3e2598d6288c8678df07fa9e1f5e69239e6704a0f3b1f5e591c6. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/ITZ4I2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe36ef235939b7047e68d2e6dc0ac08da74508a0162c964292918d4e82b6a26f2. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/ITZ4I2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde55cf4517b985f30280c32912b5c929426457c6698c062ec68374dca3be5300. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:44:49Z), 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/ITZ4I2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd09f6fff3a6426e0a52b2e13ce1d5d51e1539991e0e72c5698e702f1325eae8d. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:58:46Z), 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/ITZ4I2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe3a5a9ebe7f68de59700e22938b47f1402b259d70f8e4f5916003e6ff4ff71. 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/ITZ4I2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c940c907f48d18f32526ff585ff56894d126e310d7b9054f42100da378aab7. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:46:50Z), 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/ITZ4I2500004.