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 0xc47c2c23d1cf4faaef86abef72477074d8d7c014c3f0dfab5dd1f8572e550998. 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/b03f1e4e-82db-4560-b97e-eea4924abfb9.json and https://artists.proofprofile.net/proofs/artist/b03f1e4e-82db-4560-b97e-eea4924abfb9.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 0xcfd522f270b42902bc791d3768222a198b86993ce1a3bbf07d6aaa604dc159ff. 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/QZTGW2401516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb55f04cad64626cbff3872737401225da46eacf69ac78bf2e0903c31afa1bd2f. 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/TCADQ1888430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb00427a81d4a2f2fff07728f2e387875d415edb21186ebc2130f841cada51b7f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/TCAED1968098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc8ace9748e9acb32c948f8cf1ded95d4d2ae3420237a201e806fd81404ca1d. 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/QZDA42317919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c7f4e3dc80cb580b581d4cb69fc71671f886bfaaae893a22f8baa6dd66e70. 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/CA5KR2373345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaac226e065a43e582a47026171355112a3a8726b17131ac8fb2ca6934a7aae19. 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/CA5KR2374997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x286c7f4e3dc80cb580b581d4cb69fc71671f886bfaaae893a22f8baa6dd66e70. 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/CA5KR2373345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5a12f2315367f7dc3b9c9fa883cc7736ef05c81d61e14c736dc348e31226a62. 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/CA5KR2375402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbc8ace9748e9acb32c948f8cf1ded95d4d2ae3420237a201e806fd81404ca1d. 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/QZDA42317919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ba117c6bf0527fe0c227cb21f1ca685f4c4fee40ad94dbdb1afbe3bb3d7fe3. 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/USDY42117461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x417b629d32871fbfe5841fc19da35fe2288a7dbacfa2b02d17266c50e5f085f3. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USDY42117462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe533a7d1f038d103a6443f893191007639f00fdb3f5f7ec0e4e8830c8bc76ebc. 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/USDY42117463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42edda1a035e2a969941e5c18b9396e6f3080d17e908662f94782375a42f68ea. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/USDY42117464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce07b23a84ac23fd121300b4842a53bbd378167fa51be2afb159ea25de134260. 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/USDY42117465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa883f4b7a85816188150249bce79d8da2f1fc647ec30274de91d99702f301e15. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/USDY42117466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2de458b001a880f90008cd9081fd8af332b951d209205380154b0b07eb1f24e. 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/USDY42117467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37deb3bee5724b51565e4d1690ae828397ae92abe9256c78f11aeef516168d17. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/USDY42117468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb1f09cfea94c438038a9eea0d8cdc989c7ca11fe34305fdbee560934d44530. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/USDY42117469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe65183551be3e28c36c5c8f92b5185673a31acf79788d20b419aafbfc2e9cb5c. 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/USDY42117470.