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 0x2016e4c3698f25a7b353a94755ab53db30fc406b466ec21448e733ac3140d5d5. 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/9745561d-884b-4863-a615-692db4bdadba.json and https://artists.proofprofile.net/proofs/artist/9745561d-884b-4863-a615-692db4bdadba.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 0x99f8d44ab3fe6e015a463fc0839be9a48224269b488a4791199e4f4aa8d802d4. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JPP302400505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa407fd597e185a91cc84c2fa8832a579bf9971890c4bcd8f27424db75e51bc12. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPP302400506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1ce637388b476e490ec36b0c1a0b66ab084c7516daffb882741bbc02852eda. 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/JPP302300334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14ef60ed25f58add5e24ba7ccc55d219fe6e03fae9ce2cf564bbc0ccdd4a196. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/JPP302400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe5f166bd71f584263f916e347eba322fd209a6fc2b71849da4f8ba7494e2e7f. 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/JPP302300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717d1b986ccbca27c3953745feca7071e572e598359f4703e66997e7dea187eb. 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/JPP302300373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfadc2a8c9fd289eb62160bd8f609582d9160f2f4d9b084372bc02dfae966ca37. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPP302300374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898ca263c21c54ef34cefebb0dcade4b3c17b9f756de03a1ff24084411439184. 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/JPP302400382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d92f615ca63e301828b20f54ec78f376377e639f7a850db69db2db29a05dfb1. 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/JPP302300375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7059a4447732ff7fb086ec5da229276ccda729713875e9853e860901a5f060b5. 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/JPP302300376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee61108f2b3022b2adff7428133837bbad6d7981252513beecb384e433b2651. 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/JPP302400507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd952f7f7f729755e3eaa850f1d8f3ea5183e6ee4abb8064735d13e9b53e551d5. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/JPP302200502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeea2d216d97705e95d56f6c8a66b33515f73a1871375899e536c060524c1de. 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/JPP302300712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9c9737b1c9be57384eaf37c7ddf153fc0f4305201aa7402634d00fbac481d30. 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/TCJPU2393288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4d70828158065b067c74ec02d8609ac2d66e786b494bb73e11f5e1f5f979ef. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/TCJPU2393268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6490c83093f86243cf7650164831a44db4b5a0745d42f61256d4f90ca5ceaaa2. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/JPM591001151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x744a738b17cd8abfc85db3ecb29a8bd50c79c71cd00118e0b8282a742dabb026. 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/TCJPS2216909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4296ed64a311f5c5a02ffafc6d540cadaa3f20be3caf7ba809eb8ad7ace5d9d6. 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/TCJPU2378150.