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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6504faa9fa68a4584d25143d4e0396c12ab19d5b044162150f2324c65249f6. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3de664e1-2055-4333-850a-1d0cdae3af3b.json and https://artists.proofprofile.net/proofs/artist/3de664e1-2055-4333-850a-1d0cdae3af3b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57ec4549816fecdc56ab210c4314db619b811f70575e5a6254bd506e735f29b. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:05:09Z), 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/TCAEI1932430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ca821e406ac0607db7c3fae8508f8344d18fa07b897ee35415db0bfcebe070. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:42:48Z), 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/TCAEI1932432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c430a1abdcc2832c5a66ecb706dd82048357d862d3e00b52ba7a72be5b9f56. 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/TCAEK1983649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x252e4d21e78f9ef2535e50d2ec6653985cb33a904c3316bf5e2ea9a3cf1dbf81. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEO1910441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943a54b06ae73860f1a7972d649ee4bb0409ab9b495be8135d573502c17f87aa. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEQ2084320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6940d3a958d05b8798b60ecfa2303f447bb544747177b7c01b99ff248cb26f. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/TCAEQ2084334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf90fa4caf31dd442c13d0ea2c4677b2e5650427ce1849dbb9893367afb2f8b67. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:42:46Z), 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/TCAEQ2084340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c4b38542da72b0b7207bbaf72006c299847171635835c50b6a3e6655da81e4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAEZ2014678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a0cba2b66809c186b0b0eb465875d07a2f122ac39d4b82a30365a4833106b2f. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAEZ2014680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe696029119e8a4168e444286c38a05d631bfb8d0f8d9898d2ca903005239c82e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/TCAEZ2014681.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90a23df2cf1a16770a8038fd558dc6df1d1fbb9058da5764bf60301537d25af7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEZ2014685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a01b3370aa3bfa87525f0eabc63cf2e45169cb9b4c993f7f77ded5b590f62a9. 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/AUNGV1700486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb67c76cd1631b10ffbfe6a204f54e5f2535423217ccd6fdc3ab033f233c9ccf8. 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/AUNGV1700604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc9f0d3e1c07aa19e95ee69aec4ca192b69b2516e6834a088a5b86dc25762d1. 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/AUNGV1700610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a9ca972be06883081f2189bf0f2a10d80ab817ef02c3dc7fc46ea93af9ca81. 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/AUNGV1700483.
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 0x0be363666c1851ae836884446dcdf58499c755605796ef305a7c68df14fad314. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/AUNGV1700492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a43e0819f135baf7014b946681292d3d3f0bd261af1b37e2b3b8bcd38e759b. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUNGV1700494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbfac9932ed9b1a5bcc5d8c463f450ebaaad9018ff001b053baeb173df0b238a. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/AUNGV1700495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4be0aded42a653ae5b04e30e5adf53f2a1bcb49a5646cdaefa20ed869b3066ba. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/AUNGV1700614.