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 0xeac147bfb2bff6e4bd350871017dae298a34b3e6565e5455cf419afba9c0ebde. 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/88b87b32-d7c2-4921-906c-af4534cc5bd1.json and https://artists.proofprofile.net/proofs/artist/88b87b32-d7c2-4921-906c-af4534cc5bd1.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 0x00a32c6cd5e27af0c756b2d86dea5314375d32545039990f20bcefd8cbc227c4. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/QZS652314769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x199afde1c893a55a0f21a2dab9fbae6f204bebc927df5631ade153a1ec9afba3. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMHN2388202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2715ebbce5841c19297af48b545b3d65b0380f8f7dd0ba0ecc3ba330448812d. 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/QZMHM2379277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b277b91c35ab7c66da8f6bdafef4061964c4b68a450c982bafecd90a6503a6. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:42:05Z), 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/QZMHK2392377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08eec8359e3079e3c71bfe342952454fa8ed8ada48e39717c45a1527450ad31. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZMHN2304302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc41f6c3af02061948ea2d600cbdfadb59ac275fe303f8f26ceaad6576f9accc. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZS632331048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b645f5773df2346948971f2fa6e09b3e8ca254fc334bf0b543742974c1e0e3. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QM42K2365166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22d58c12467d2ff07aa0bfcf9b165ec0d60185845e597d0f5a4670d5d3ef1a09. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZMHM2376540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8144c608c3b830a414bd9901d869f398632c47ed1dee8daa9059378d1160ac9a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/QZS642334709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7f0deda4245ddd770a2b4d6261a364bbf4d119c3047475154f23d41fc264072. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZMHP2308380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e82ac7488d2de30476668cbab8a42ec0e9241b2549e7028440781565b11e24. 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/QZMHL2315560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc877927be1660ee48a3fbf3a758453e2b45175b09cc04f0f62ba45ea7fcb8df5. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZMHN2359294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be5fa6ef6f1aa1626eb675223639cbaf96687856b9dd165ab5a3756f4cbe538. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZMHM2394824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb75e405541877287df403cece00a795782c0afa36a14190f40056948c17d30ee. Chain 2 (Bitcoin): anchored in block 958987 (2026-07-21T11:33:49Z), 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/QZS642300208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52f5d1ec7b1370005c7b3d52b5de4131125284dea057111b70e462331388fd7. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/QM42K2360720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06603acf1201e44ef756be73402e42b62d671d7181492d1474954c768f26183e. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:53Z), 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/QZS642383035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x462b4d7bbd3a976a8ee1dda4ba365a10912bc853742703836b7898882402f049. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZMHM2373669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d237acbc9f323708d4ba5ebb5d028ea2673c9fcb79e6c325993e8656cfa50e8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZS652312221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6fb3ae1bbffcd53456a73aef55c9732d5aaaa19200082d1ff012afa1e103db9. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/QM42K2332154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b36e33297db66f67e610e0d5dd8c52b5150443ec1f0be57ccb0291a6ba4dbf1. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZMHL2369170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f55939d3244401f217d9639837ca1b6288c4bb6017601c53d5bf3f2e3c782d8. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/QZMHK2362657.