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 0xde45cc5d8f7e8be99b1b84e222e64052a34e7f6c1f3df1f545323be928a75ea6. Chain 2 (Bitcoin): anchored in block 954650 (2026-06-21T04:51:12Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d9a9ea1b-b721-406d-932e-dc94c4abcef2.json and https://artists.proofprofile.net/proofs/artist/d9a9ea1b-b721-406d-932e-dc94c4abcef2.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 0xb5f4cdf2f0b1ea8c4f4cf55d2f58c0f862a3fac0c546bfe69f6bb8fcef74cdf6. 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/TCAIE2470071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29ed66c5333501ce281e8f371a58abc346933ed842b5c0e6e498f3efb53a71. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:08:09Z), 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/TCAIE2470113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6290215f138fefa66faeb7d3629a939bc5c2ac02c52d43b87dbd794e2996a809. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAIF2470142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ff721a00df786f46e1a11113d72954b6542bf74333f417c407e1931678ff23. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/TCAIE2470183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb50e80c851667fef7028c0a75a9138ce0e9bc4647d116042e328785d7fba009b. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/TCAIE2470202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d9a4e6d644dec6a8a3dd55279380e415219aeb3bd346d426a785d41f018d785. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T22:39:33Z), 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/TCAJI2562400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f4cdf2f0b1ea8c4f4cf55d2f58c0f862a3fac0c546bfe69f6bb8fcef74cdf6. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIE2470071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce29ed66c5333501ce281e8f371a58abc346933ed842b5c0e6e498f3efb53a71. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/TCAIE2470113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6290215f138fefa66faeb7d3629a939bc5c2ac02c52d43b87dbd794e2996a809. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAIF2470142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ff721a00df786f46e1a11113d72954b6542bf74333f417c407e1931678ff23. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/TCAIE2470183.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2216353a146946286b956d2dfe7aff9dcde9d2017f7a69e1b154f9f18bf3df0e. 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/TCAGN2279335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b60605d824fde4fdd887a803650f1d62bd6f272a69e66c37a3e1fe89e396c7. Chain 2 (Bitcoin): anchored in block 959109 (2026-07-22T10:14:38Z), 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/TCAJJ2544719.