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 0xa043e3f9d1691acf4b06cd2069e16223bc4add2b7f83759dfb633263e2c1e897. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/634ea874-db87-49b3-a624-9c5d1f5869ec.json and https://artists.proofprofile.net/proofs/artist/634ea874-db87-49b3-a624-9c5d1f5869ec.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 0x59381c11a3d88297405d775098579b6ca880458b5c6a1393abe7bc3047eb0694. 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/QM4XQ1500033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb22349fe4707c441920600581e95f5b64e1e8350b55402549f5e7d1cb8c23b2. 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/QM4XQ1500034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc73bec0c36dbb04a9fb49e586671c9141b7fbbfbce561a0eea6ffb8d86a3a9ac. 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/QM4XQ1500035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74001f36f466531d71bdecd03e693ade24fdd76ad455c366a735d41b24cae27d. 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/QM4XQ1500036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde3a45de0605dd03ed94e56fc7281b1dcd44f3f405791b511e3aaf9c5b68e2d4. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4XQ1500038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12d3c82e68fb569e86ce941f802dbb854995b2add55c9b26a064b3df1cf84189. 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/QM4XQ1500039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d16b03e0ad725f7d256607b264f010146f7195af474ad70fddfd67b34919fe. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QM4XQ1500032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4deb2e545670e0bd8c303f2089b01509f5d97a4be4f204c0d0859e2e1581bac. 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/QM4XQ1500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c22d883f2f7edff3c1db8692283bb024944f780be32e78bca46753a9f1f6534. 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/QM4XQ1500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3302ac718711bb62874206f7557fd9468939dc834565fe9d7ff08e84c5937267. 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/QM4XQ1500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01faddd3a2a659fde5af1cc9b76b3e9440dcc19debe07fdea9f928856e75e167. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM4XQ1500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4d271eeb4903ad43ab53c684409c1af45f1e4e00e068171c46fdb53398b3082. 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/QM4XQ1500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf764d3d160575c2e8a67eef78ca925c2cd878d2746ea409b725121765f6cfd89. 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/QM4XQ1500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04037a83bc7d56008d26dcf6d02bd114694ac9c73cc3063533a4e1f314698ce9. 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/QM4XQ1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04037a83bc7d56008d26dcf6d02bd114694ac9c73cc3063533a4e1f314698ce9. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM4XQ1500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c22d883f2f7edff3c1db8692283bb024944f780be32e78bca46753a9f1f6534. 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/QM4XQ1500004.