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 0x2b97a8681cc059c7458332dfde76e579a091ae78c47c6a25618424718b33d8b5. 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/911d05c9-0557-4629-91c3-8b25520f9c86.json and https://artists.proofprofile.net/proofs/artist/911d05c9-0557-4629-91c3-8b25520f9c86.ots, the client at https://opentimestamps.org runs `ots verify -f record.json proof.ots`.
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 0xfeb4e1dacd5b135a67f178df2bf9ce521b4ff4086ae0819e0a64945bde3ed7ae. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903630 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32cff1e24fa179784364f0601c72416a05a84e7973db993b8311a40c8fd290fa. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903631 — a six-check JSON result.
Native American Church Set One, Pt. Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf8d8f786bfabf667aaf52639000f31c4f29578cbd27c53c2bff0e0ca5d3d976. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903632 — a six-check JSON result.
Native American Church Set One, Pt. Four
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d5cbca1c40facaeb4fa2c3e108c9d9aea6d10c5757ce53f5388b1d6b857e1c5. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903633 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7799c11c764d701ad1370965dd4f9d7ecb96f8639f3420af054648440b3db241. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903634 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824165c75148d59bfcd62f6e9523c2850f8021076e0b241427d7f00e8dcbcce8. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903635 — a six-check JSON result.
Native American Church Set Two, Pt. Three
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x894d11093cc2d7fcc6d70d3782f55be54dbfa6c9af4ea5be7eb27cdf5dd04048. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903636 — a six-check JSON result.
Native American Church Set Two, Pt. Four
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61e4ff4b51d6390fae13ed749a7459f6962bb1dbac711e3f17570b2955c1d314. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903637 — a six-check JSON result.
Native American Church Set Three, Pt. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad40a8a0b7cb390647fdd175e12651d4d4b032859c41a1570e4f6f568a5200ca. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903638 — a six-check JSON result.
Native American Church Set Three, Pt. Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b5c834e58645bb5799f208905647319e09039245e041d8298e1c4fb67bf483b. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903639 — a six-check JSON result.
Native American Church Set Three, Pt. Four
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c72f728bf914d298a478551de72e5e7e3c2ac7258517fa4facf81092dca3ef. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903641 — a six-check JSON result.
Native American Church Set Four, Pt. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63eac8c607bee888ba31046ad27ca0735626a4655d264cc6f2fc7d35c5a1db40. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903642 — a six-check JSON result.
Native American Church Set Four, Pt. Four
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9cabd49f9032e9908ce2ffc106e9231a94a4eb6e5604f49df78208373f9370. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903645 — a six-check JSON result.
Native American Church Set Five, Pt. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x374fc1e3390624c2382881bfceafd1c1b0896c2dd5f9f1e2de1a06a8bf920047. 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903646 — a six-check JSON result.
Native American Church Set Five, Pt. Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d07f122ea215c179314569f881a78972b78f48f96731804f10614758d282503. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903647 — a six-check JSON result.
Native American Church Set Seven, Pt. One
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x432451c541ebcc509d5edb398c61cd490a721f6c58112be449189a388d364107. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903654 — a six-check JSON result.
Native American Church Set Seven, Pt. Two
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a96ef463fb2387517bc31b563fd0df6f881441b0d3b96bb8911253792201ad. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USCGJ1903655 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x954143769577d0766527f8c7091583387be6f00d30b7bf41bdb1dabc55c670ad. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42030962 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd528c9e0bebd1bc752701b0b5375ae707a9f257a234b8827fb327065a0ef76. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42030965 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcc83274aa7bf39d89a1c25870c2e76240ca2a32c4b91c6673fd8559dfbca7d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USDY42030973 — a six-check JSON result.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ed0441bccaf0f82b21c94a5606cfd4e4f3b485c0f8475c536f851891a870194. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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 at https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USHM22360894 — a six-check JSON result.