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 0xe7b525a13f1a49bb1e8be0573b46405718c0e88449f784abc86704b7bbf40f74. Chain 2 (Bitcoin): anchored in block 954667 (2026-06-21T07:29:20Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c99e0f11-e532-447c-aea2-e6e5bbc49c92.json and https://artists.proofprofile.net/proofs/artist/c99e0f11-e532-447c-aea2-e6e5bbc49c92.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 0x87a1a954d4f67ef78d13cbf97b1e682f4dec17c1602d0f54b7e74d3af32b175a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHCR2000149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d526e2e77d0d9646c0816558d3c2dec3bacc5360372c020110f367409693b49. 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/QZHCR2000154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e2ef9ec5a35bf4c8f55606101a3fa4eb610e1f6ded23b5396a7ab5e3982026. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHCR2000156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe154048237ef1c102212d320dd7f1f944460b9925bd7144d2f8a9061ae53c802. 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/QZHCR2000160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cde0a737b2c137ad544ee05fa1bc885b9113ace49b4995842f9f7b0d0b9f7d9. 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/QZHCR2000162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4663f2d1b2e74c5034e6495a199cd333efcf9ef46798ba8b3e900a86937a9359. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZHCR2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae1eaf58346bfacded705fb4f3bc610e36e46f517930ac2e641fbd823b27a14. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZHCR2000161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c7dabcd566fbeed579ab36da45c4936150d25a4bb2245e7dc1b7d018d04b51. 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/GBWUL2010134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e78aa4e83f05f65ca41455bde3a8c51060a7f6056aeaeaf08936fc000c714db. 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/QZHCR2100131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa662ab5809a5615e34be872fc0cef8ab099be2b277109e06e4dd82d084ab9f38. 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/QZHCR2100138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6af565a0b46a70fe36b776cb76fc8675fb8354879a69db3d84e71523d719e008. Chain 2 (Bitcoin): anchored in block 960187 (2026-07-30T01:34:28Z), 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/QZHCR2100141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86251b211d1a8534af17c77038841041b089c5c17781c8fac13f8322c7e074e9. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:48:10Z), 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/USA2P2044779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f79f2b159f3d9835aa0601e19f9fe1a3c886d3e314f19a732682a6b8af510d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CH6541797176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32dd7f978c6219a6b0e0679b8e984f086d5681c0681d383433189974184b185c. 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/QM24S1914313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x728a793f0043eed8bbb865ad3ad8d154377ab58047d6df12988be8d613d121b4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2469114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e96141cd8d17d025626caad46705800020252a1ff41d21bd099a1b8d8e7e0e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZ5FN2469174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8541808bba2b8618089058552979b64530d09a8331e5f45efb2945408e5ddcbe. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:49:01Z), 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/QZ5FN2045924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d3db2891e29f6a631b26367acb7130a4f7af8a88a096fa0c0a3884bc83c29c4. 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/QZ5FN2045898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f1acb24f055ee13a5748ba95acc0c59f912edba2b47365304b849063ef8b29. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZ5FN2045920.