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 0x89f29e0a4346647165fe8061991243a51949d6e118e25b823c74116612f995ef. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/031d7642-94ab-4d67-8d12-c3e2151b30f6.json and https://artists.proofprofile.net/proofs/artist/031d7642-94ab-4d67-8d12-c3e2151b30f6.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 0x0000790204fd862572e4221ccfb9db05e504102cba21742511c8c1ac114862f7. 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/DKA5I2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363f4b09aedfc1e5bf1ccb825f85cfa7e88ac2041c799cef8ecb2450e3ba32c. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T01:52:18Z), 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/DKA5I2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814d1db7d7361d6d24dd93c9c70d86d1d7d49caf8d286cc6f7eed212375b1736. 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/DKA5I2400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0000790204fd862572e4221ccfb9db05e504102cba21742511c8c1ac114862f7. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DKA5I2400901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe363f4b09aedfc1e5bf1ccb825f85cfa7e88ac2041c799cef8ecb2450e3ba32c. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/DKA5I2400902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55fe817606b3636ad6a4d909a60a328969f862bdd4eaa46b308ed0c9c4fa93d0. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:02:09Z), 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/DKA5I2400903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814d1db7d7361d6d24dd93c9c70d86d1d7d49caf8d286cc6f7eed212375b1736. 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/DKA5I2400904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508d1cf4f798a8a9f589261e43c02cd0cd8b6f0d2983991cdc40a5f35b4e01da. 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/DKA5I2400905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x058023fb9289a53d645b9a6beb3320019a9275713f65785dd430771973c4174d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/DKA5I2400906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa482adcf7d1d38efb0e50a27bfd0a86b557521fca6003f9e5de46fa288bec016. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/DKA5I2400907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c99de92ced58784a9db263fab2630396eacd63dd9ed6d594d1926d1a47bb767. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/DKA5I2400908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750e63cdcb7b9dcec7c94ebd2ce1bc8b55fb5fb725bc33a66900fe2fa3ad6d0e. 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/DKA5I2400909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bf9f0ea9d9d9cfa409b6b3c024e58d74bdf3e8fe52e775042d675aea354a1a. 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/DKA5I2400910.