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 0x31d9a7e2bdd6fadaa86d78636015e7a3222f84192663a26647c6c536d181b243. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5d7ef740-73fe-4d60-85f3-de8b0a581d57.json and https://artists.proofprofile.net/proofs/artist/5d7ef740-73fe-4d60-85f3-de8b0a581d57.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 0x707342859647216867794ad534f45e191decbe5bfe0507521f01e616176f7014. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T00:35:28Z), 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/NLCK42225963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cd34d0ad2626ba65ced90ef9cc634f4069a9bc2fa405a54b5239f6bdee8b87a. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/NLCK42225965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9114b8029f4c80ce32d577888049c95a05ce51d02728195cbbf4cadbc58970a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMHM2336622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa81fac49aa33890566761dccad9f6707a4aa849847e5c2a4a27fe2c078587927. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/FRDX62303150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74db46687fe3c861f5b07eeff22c68fe0ce075f36ac261bf1ab9136f82c26929. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMHN2292952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3b5cba32011730fe17c00b7cc8c94d61dbe53bcfeece1e483a2d0e214aa2c4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/NLCK42402951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4711937b8ca3c68f5bdf97ef95dcbb11fbf92e96e9b5e03612e08a5082f9b80. 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/NLCK42402953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb930ea2bf8286866afbc35f2448866455509387c684cb9261fb3cbd983c6025. 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/CAENV2435629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fddca2ba845172846d54dd71b704d9ed47b1dea2061b1547c59a850fc5c78d4. 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/CAENV2435632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e0573547bd7746ced41af4ff7c51e32a6f3ab47f1f3c460babfa8f9bb823b3c. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZWDE2413782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d0311a0ccbb2254a7220970ed208451a4a131dba04c5bbe9f5a45337c96feda. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T16:39:24Z), 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/DEH742435227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7377e90f11019df7fa24fcc8b147e77688d79f6ac87b8fc31c02b7233b31141. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/NLCK42421063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd475b0264234028a22c10675120bdecad8e79ab199a043ffbd83021370893718. 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/QZTH92329686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06d113506c41201a4ad9faa201a14b50b2217be71a07193d24b7a8eb3edeadee. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLCK42232050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f856187132dd2cf2e02cde61b9ee81b328b962620b030cf43bf0651c3fe061. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZS632384594.