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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a3b833ff4a70e7534f0d8999a734fdf9baa95273c173048acbeb3c921f6877a. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8e018158-9846-40fa-94de-00e967cf9f16.json and https://artists.proofprofile.net/proofs/artist/8e018158-9846-40fa-94de-00e967cf9f16.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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e8ad6b05d5ae471f1e5c6dbec590ead524477746b4cc6bdca6b0bebaa7e0a8. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/UST8K1869806.
School of the Gifted (Black Stone of Mecca Edition)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d296f96c35eabc7ac088eea4f2b9c59ebf48740ce97f768c55d8c764a553434. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22371728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cfe834a92b7dc15050371c6bee456f42d50106398022e0452ab39fd44b61988. 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/USA560825628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4362d7e8b920d692c651e0357b67e063dd78e4ea24c5aeebecd4dd798fd434da. 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/USA560825629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d75a1fe83d2939fcb0daf9108a315ecce366c81485d10297def63233bced92. 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/USA560825630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f69ef0828c82875def21ba1235dacba5dd4a82372a98703275f03618e1736c. 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/USA560825631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5145282ea63c9b58b048393c7e8fe158d0f21e6031dcb351b446c38b3ab9160a. 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/USA560825632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9429aa752143ec37d215e99aa0829a115e810972c992e843061160229332c5d8. 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/USA560825634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926740431e7c0219a4d53900eb5efd036da5e296c0041a8f2a59a3233c52dc0b. 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/USA560825635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60e7075b83b1752a1749c3a1661c06a135e6c32c8ee476a69d483019330dd35. 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/USA560825636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e22016496ff7e51f88b241c0de0ef0bb7db9400652f896bd9bdab4030c12ff5. 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/USA560825637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab40dbab1b9178e840a7ac86b483616da878a85ca6b11f933b7be4aec9e4ba2b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA560825638.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89f910d2bd4b84a617994213d0e17ae7ed89b110a518259c232ba5b4c20eeb89. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA560825639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f429facf99e0948ded66f9edf40a2950ba131919e0832cc331c148a6bfdc5d2. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USA560825640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b7c8ea958c6da915b1802c50e2aaf7f550cc6c3e1da4b36b346b6bd24811b3. 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/USA560825641.