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 0x542eb07a325df944bdfcb5978b5d345926a30875f8864c7973c68bf1d94eb823. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7e50382b-9728-470b-8d88-940555eeeafb.json and https://artists.proofprofile.net/proofs/artist/7e50382b-9728-470b-8d88-940555eeeafb.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 0xa5bd94dd70cff476de28f1f1f6672d0f4736a6598e3d443ffaf689e08e9e387b. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F72571891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac839e55b7990690ed97b69b01328b9f5d61b60b5d546f773371496b3d68e95. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QT3F72571909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16168f5eb7a7d2c8777cac904df29ac7f807c05231c51ba88b25f00c339f9d4. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F72571993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a23ef220a4290cb30a8b7945c33f1ccbdeb764271982f2ca26036a0bd0d12b. 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/QT3F72571941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc3c8fcce0d09377ceba723fea4462fdf03c80755a178f5139fd9812138c3f0. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3F72571995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe293e61dd55ee3288f72b1a996a2cdba752cdbaf64f1722fdc3510e811225158. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QT3F72571946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9f6929c59b93cef2fb7538ba92a65729ebe0b24b6b8f2dc5cc7b9e0e62cbcc. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F72574585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d0f29471c1bea77ce610deb7ffd40540f1ba41babf061bcce822985786b9e1f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QT3F72571999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09621961a77f374c433493ec13944c9dcf4dbceb1c221794248e3fcac891ea39. 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/QT3F72572040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb5d620baf79136097c3cf75acf648213b9eef2b74edc50288a766c2f8e5440. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QT3F72571998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047c9de1cc1ae3ea4dec7f098f0573420725b536fc11dbbb342cbea643bb96db. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QT3F72574505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afe61d9a8c60f54ef395a5e650cb4531ca76d3e880f42fab59e0bcffb330cf3. 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/QT3F72574326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34fb741edf91668f63c085392037cd29fcc3bd76ac282b8048b758887b1606ac. 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/QT3F72574611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49042374fd122bd709d06a791939f6857c722bcd8bb76565d0a0297e0de6d6cc. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QT3F72571997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5a6216b110c7aa03c1f8a55a3b6fe9b90ea819977fe89a19aa774a7d57a4de7. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/QT3F72574405.