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 0xfb6c09ca03e7156f5ec9fa2ed456172d3b1d341c12f002c2e4662c459d564a65. 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/5647f8f5-f7c6-4b36-82c4-8bf817424cee.json and https://artists.proofprofile.net/proofs/artist/5647f8f5-f7c6-4b36-82c4-8bf817424cee.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Reflections, Vol. 4 - Mixed by Ambientologist
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 0x4c423b076af1fdeda30787ae74d7a0b88ce8a99a763a14a53b2056fa65b01018. 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/QZWFE2424578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcbeecdbf19c76812bb821a433c0c3bf1556cc240961d13f760d2103099276ac. 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/QZWFE2424579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc49585ec9c68259b3bf7d440d8b8c2bcb397840349e3d30612dc15a96cba441d. 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/QZWFE2424580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ffa30f2054377364be63c50fc076ccfdb955d2147193f7dca919dd2ca69831f. 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/US83Z2332657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196be97480097d232167a7f1bca0015ef3cf5ac99f035f379a636143718db953. 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/US83Z2332661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe0bc2827f6d714b70614b4ca5497fd0b7a2b8bc49f5a5b330afc1114b49efd3. 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/US83Z2332662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9a6c9d73395c47dadf77333601ab77fafa5c4790b6aefe847dbf07a4d1a99c2. 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/QZHN92398045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4201cfdb6f2dec59f6fb142e8e74f226ab3e14535a7c82696c7d5bf8ea6749af. 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/US83Z2100740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe30f5ab0f80b9b18cd12e1d3bc781f66c95341e63da3c98998e7157c7c239237. 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/US83Z2100743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x876a44952239031309df88fb314a5baa014a1644b16f389d901b636b42a968dd. 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/US83Z2030167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8467ac38358e126c1df066214b619e03d220894ac31e1252bd5ea8e06a1ae557. 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/QZFYX1929450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3c16ec05bed1c0ed6d2eca1b9f3f83fac1321cc4a095e661f0b8ed8bbce0eac. 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/QZFYX1929453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515a62f64cd1647f2e9d59e36260608d5a5b102d8e56d1f99aeb74d0f20fa0e5. 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/QM4DW1864958.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15069b8fdaf6fd8ac48d356c10259f661c8180c56a02118459924af852f36838. 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/US83Z2126486.