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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d362dea5bfef45e60435aae01834314a56683cb6f9fdd2b855ff282e6e387a8. Chain 2 (Bitcoin): anchored in block 953699 (2026-06-14T22:00:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5bf6bff2-268c-4c2c-b800-fdb003aa732c.json and https://artists.proofprofile.net/proofs/artist/5bf6bff2-268c-4c2c-b800-fdb003aa732c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Big Room Bangers Vol. 3 (Mixed by Pavoire)
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdce95176000ae23d76051480fac51393d1b2dcf46062be273c785466ead0b93a. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLD682500789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa524f4e7354debaebfd3538d5f1820609895a1145118c1dfbad3f70b51da586b. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/NLD682500790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08fd2cb1dbeeebd07a709edfe97621fa8199fff74dba22e63cb519197262187f. 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/NLD682500791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c7d338ec8fdccfaed2b2ac1aa0cdadc431c2055492e29316cb87abf0620596d. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/NLD682500792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26b726c02e5f82a5c9e7bb809a144d2b9c496b5712f37d81461ccb4b9349ffb2. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLD682500793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda9d311106e0001264db462f25ba6b6c07c34a5c10c05c61ad2375a892ed7043. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLD682500795.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70f37f927b57d4f875c12ffd97728e3d7216635dcb7fe1c20fe5ed44c276ad62. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLD682500796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5faada0d2e2c3bcd54514c46f583ccb2c0b5f2fbb3949e236728b969ed50d859. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/NLD682500797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81a94bc8f18c6dc6a6a75e06dcefc859524d4cd5ab1d2ade536ba78a545985e1. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/NLD682402552.
The Best Big Room & Festival Anthems Vol. 1 (Mixed by Pavoire)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1047890e62f6e82b59cb9638451c5858cf8dcc77dfc0fd0ea258a4039683136c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLHR22401038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb539e2f5fd68acf995d0d774f463b7dc9be34b36f8f8e423a956aa243a36e2d7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/NLHR22401043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579d90c9ec388ad69ba59798a404c63e2763c3a633bd7f290b8d314920f79f68. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NLHR22401044.