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 0xc0239005e0457df2711d7fd2eab5e6865f65dbd338dd72cb8548a27175b1a1e2. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/94f85e0c-e43a-4fd3-8df2-22ebe9edde3d.json and https://artists.proofprofile.net/proofs/artist/94f85e0c-e43a-4fd3-8df2-22ebe9edde3d.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 0x3c6c64e5bcb6b68ebe348b8d25e0a604d51aa012fd16453377dc5e2afab0cbc2. 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/FR6V81161779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197ddb29873e31ee022d4923bd073b2d4c945fde244de14b0575e7d3dfca1d79. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:58:34Z), 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/FR6V81161781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff44e38c0a7c04c2289fcd5cd60a0a152bee21a96c6f5a6d59c5c7e120a18841. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FR6V81161782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf80803796a0190cfc4721a627c3fa6551e8394d5eea0206e1be8b3756108de0. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/FR6V81161783.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa36c4a64ae60c8f6d94f638a25a2015a5a4474849a4e09d1da934332c2378474. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:20:16Z), 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/FR6V81198550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96ec6539c4235b5134bd29deb83fd9d036057db5b22b2592dded1a693e35993e. 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/FR6V81198551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd60563e1ea323f751b865aa29350ff68535d04ec003d2c3eec82bfdc3fec7769. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:49:16Z), 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/FR6V81198556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2454d5661222fdb10af77c42e4502439f9c2b07cb3df88827e6beb6d786f0b13. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FR2X41400085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58d6e5b347fe45907ab42100a1eb9c0b00d90667fcaff59a5270b732dd73fa97. 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/FR2X41400086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb2b11197c252004a769798bafcb8cba2ad78d55cc357863ff21b4afc2cc77e. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/FR2X41400087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7bb8a224ef716447d7fe661a8e8a17f0da7bcd21bf245eda91741dc555b80a. 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/FR2X41400088.