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 0xa8bf07e5a3c4ca88c24bd99fe9a973a51b08aea8bfe9cf0aa3311280c62199a0. 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/188d9033-8d17-4577-a89c-be5f5bc64138.json and https://artists.proofprofile.net/proofs/artist/188d9033-8d17-4577-a89c-be5f5bc64138.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Clayton-Hamilton Jazz Orchestra - Live at MCG
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 0xd836d80c340128f8501c4eb89f712195f9b2c994b4ce6888d21d939ba0ac39e9. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA580501701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb178c3075626a3b90659e25bbc1e7f1cfc7abf5eed06b20b950c819ac757af1a. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USA580501702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599f96285ed59a78a939170f94a78ad4ddcff7a603e284b72db8a07083d6b8c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USFBR1413201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389f45cccc6fd780196724bfaea05681739c622223f705ef380f3fbfb7fbaddb. 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/USFBR1413202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20bee5db18775708676cdb637204906500e7721bf6ea5eb6398c2d7b3dcbf0e0. 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/USFBR1413203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x415205b9414f46f25de23e43a3351bb5dc5082148403660889911a99c1be84ad. 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/USFBR1413206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd804a9dee1789078b156cfacdd24b8005d4acaf2601d49ec447cc6c1fee69f9b. 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/USFBR1413208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae16636482ee92a1372c00d5ff7a72a7e4835cb73c14a6a0e397fe5a40a9874. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USFBR1413211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f46d3e08b59ed2739b78bd8a6a937ad89ff378f5003ed283d0ca8173b7dcad. 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/USFBR1413213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06daf55b4635350ec8414268d21532d09387a8d3fb531e59504de1089b4cb635. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USFBR1413204.
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 0x6b32521b667153fd0842f55339d8931f3a64d8ca92b90a9b6caead75d27f12f4. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/USFBR1413205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb71c89565773d6b21837825c075d1b1a81b5850caf6a6dde59cfe496e73b704e. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USFBR1413207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25b25a1e40b272438823d6ea6ca40a08c480ffe7a80b3645b95f063cc8c0d8d4. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/USFBR1413209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d9d63aa8bedab2591d33e9b6f11168f67ef91e954b4b5d0bd387fea9ec67eb0. 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/USFBR1413210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ab50c284986cf0e80b7ec1531c021b7a56ef75087b0bfb09a7347d5b544cbd. 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/USFBR1413212.