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 0x5cfc3aab28dddd4d758022225c9ba27d157c9dae5164572b9fe83ad7a0230115. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/91968f30-aefa-43ad-ad9d-04d3684aa256.json and https://artists.proofprofile.net/proofs/artist/91968f30-aefa-43ad-ad9d-04d3684aa256.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 0xb90e33833a1e212e547792711022b497eb2a98ed455ec2a50c63ac8356590f29. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:34:45Z), 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/GX5MY2264124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x150f4f92dbf0b785255f958c2ed34386c459e69164bfbd8f0af3b90eb01d462c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:58:24Z), 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/GX5MY2264140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3517f0efda3e6e55e4d5f02d875ae5da77d1709bea1b8f33aea7e29eca22a581. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:10Z), 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/GX5MY2264126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf596c7960fad03a27147fbfadf215a3263eed350329f6a45bf5ff3d8f8eb4cc7. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:34:14Z), 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/GX5MY2264135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e103c9474e50bb54c54ad35fca246237a0533143b1e7e37b5eb8d8962f3c044. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:24:21Z), 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/GX5MY2264132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449119b392a71c6be1d96cb8c03c2204824644bb766523ea9563a8e54da6c444. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T05:00:27Z), 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/GX5MY2264134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9a118a093d590989409656146873b9bbe5f1be3707e58b48661b6b66815ea. 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/GX38U2366093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf2f44db9b23c659b04de93a1349eec649768aff1062fbfd1a28dcd3bc6aa8a6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:56:33Z), 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/GX38U2357446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6f6e1de8b3bb833657a54e0be1d596b15ae6295c7c7b9f4c71a8de8e1fd1b08. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:46:31Z), 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/GX38U2357392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0597517918df0e5e87b231b38b4cf73f2bb6af82dc1c78c41c090dd362cee52d. 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/GX38U2390748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x039185d67222de36b77a330d371096b5a007657f3db4e654afdf4999ef7818ac. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:54:07Z), 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/GX38U2385170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f8a852d6b32f1aada11d675a2a2e3e222588ea6080b9c1b06e53980999c5ede. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GX38U2390601.