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 0xe3c043337a73d11dd8a7c619440aaed341fe72cb802e5393bea58fb94f7a6eee. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/76876768-c8f6-4d35-a534-abbdfe23cfc3.json and https://artists.proofprofile.net/proofs/artist/76876768-c8f6-4d35-a534-abbdfe23cfc3.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 0x6330c805907c5719075dd9e05174108d796f19db8757625759c60a17b94022f0. 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/GXHG92548069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0be4a67ec14115bebaff5118a581ede478c0cd7b138ac5b5822e2deab402d94f. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/GXHG92548071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca674aba3e0cf56de63fa5aa97ff0d54a66d685ed80dacc1e4d99279203dee6c. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GXHG92548072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbef1e5c871814af92ce78e931ce3e2ad60677f437903328e227084e3be4c243. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T16:23:52Z), 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/GXHG92548073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffa77650be3c3f05fbc53a15d461a591f006377c95dacf400b8b047f2e424929. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/GXHG92548075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196cedd864fac6bf88d76bab304c0623a1a13ead64583b3f057b611138aca238. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/GXHG92548077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4032a71b566f979ce0b29c39ab125feeac5ffd6703d976bde550495e6896a1c. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T18:47:29Z), 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/GXHG92548078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fc114196b73588e20dc444a27bb53a647fadbddb204982f2f069d9aba59ddd8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHG92569550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x532f99be534e924d51567e6a609bf127bb2dd01570f391aba72e80d6f1c71982. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/GXHG92569551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x125706634a7400eff8dab6a1abeb82b912dcc641a68c5e335ec7e6bce480fc21. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GXHG92569552.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb72b6fbd7f49d4b7b99087ce827ab89573c450031adf6df7d1d9f8f27f735f5. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/GXHG92569553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf07c21799dff97c24e140b9097d08cf1a6c0d1f70a2ec9604f9edc97dad5b75b. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHG92569554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b50af79195c7902746744d2b76c416b1e56bc161b3044b39185e87def6fe1dc. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GXHG92569555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052a982106d52c622aa91ed38b97c46f24c45313c4d369083d8b2938a02b44ee. Chain 2 (Bitcoin): anchored in block 958878 (2026-07-20T12:32:15Z), 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/GXHG92569556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06f74fe04f26125d3f8b6da18e2548e212118445cf7cf3a4e7e0453f5f42ec13. 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/GXHG92569557.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ccd9acfe6f6b389a635ba727ea2485a62de07cea7d7fb7140f538271ade28c6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/GXHG92569558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346f8ea0d5e41393fe2ea6996ce289d42d3216bf0e435f85a31b1520dcd9c810. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GXHG92569559.