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 0x2471658eeec303ea4f0299f6b8096373a55cc1d6c13b206127de8535046c628d. 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/52127dbc-7799-423c-be06-e18025ad3128.json and https://artists.proofprofile.net/proofs/artist/52127dbc-7799-423c-be06-e18025ad3128.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 0xad6bfe18929f94091a548bde3ac580f9cd3caecfb458631ab60228a087bda9c8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QM24S2006042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c90472eb3b26d4b8db8aa3b97aff3153f2dd583a67d93e256e472192a90a216. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QM24S2006492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad6bfe18929f94091a548bde3ac580f9cd3caecfb458631ab60228a087bda9c8. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QM24S2006042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcccdcc278aa84f27a4bc7073c548af5f0b5a39d604ddef608b5d109d652ed6d2. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:04:37Z), 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/QM24S2006971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4a51392513ebb918be035ec3a4596589d3efec2c4a2c82958e66b40471073d6. 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/QZMEP2186266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e2c1f61eb3fe4045a44c7dbb09cb123f4fd24e323326eac05ccb327ad3d8c70. 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/QZFZ22296856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x016ffd8f9f266e4182af07e0467835d8c995e5635fd24097b910d3009d31cf71. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:15:34Z), 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/UKZGC2407876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4cee9675ee774c57f233749ea84365d33266347d3c34b8c3c7ee62f921cdb4a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/UKZGC2409784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9277e0e0568e7d253c1243a2c7dbe0fd6118af1aee2d2e11127533c06e680fd6. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QM24S2500742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77d1e562bcfad86f292c0240262690d2cd111845344c934535c3384c6f59375b. 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/ZZOPM2003339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc819f4ce50b544970fd16269e877adad9fedd5bf5392cdc9b7cfd4c3bff1113b. 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/UKZGC2407419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74129cd0fc7d5caab69fb9794ed7d7c7c79bfe573c23d017aebf478ebc9b51ea. 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/QM24S2405968.