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 0x238381429a45c6e59e56470937babe81fde37cfadd0cd1df99005bd59def13a6. 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/860abd9c-80e3-406b-b90f-cba79ae87e7a.json and https://artists.proofprofile.net/proofs/artist/860abd9c-80e3-406b-b90f-cba79ae87e7a.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Embraceable you (Remembering George Gershwin)
Ladies Sing Smooth Jazz, Vol. 4 - Blue Moon
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 0x5a74b6996ff728d07ce04015c5669cc3d3e1cfb8fc73030edaf0ee7e816d4ad7. 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/ITS042300784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23b44fde05c7d5c6eee52b18642eff4528e195f406ec0ed9c6e060251dc71a0. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T13:14:47Z), 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/ITS042300790.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0439e6f3c22738f5bea689fcaac7e980a62a03109d4c4d2fb6a218cc5262929e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/ITS042300788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x553e4fde69696c198b95df6cd79fa1de6b25631154be4d0f5910cabb5fb58bfb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/ITS042300693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd952716ecf513088c7a846bd98b3b5e7c402ca3005517bb3721d9b34ac956b. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITS042300807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54bd5907f34c2192a094dae1a887fe3ac26dade0fa06626336cb9544cc26e381. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/ITS042300802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8fc828269e183aff89f0ac61e8a162c65a643f6796fce869e37b02a2f0239b. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/ITS042500213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1b94273bae1232bfe084e0cb73b5b2d066c3346c56d2eb692a31f0e4fc4d601. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/ITS042500218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01a6f41a42104d0789e7eee9331911de63f50fe548f4632f7c1882ca0650dd8. 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITS042500214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3421c8a8286b2b7637df3c52ef31ed230d7c16d81961df8667e6a6117f543bd2. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/ITEDK2200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100c72d083edf27b906d6d83201bc4523358e7fa641507e322d7b6c68d834a7d. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITEDK2000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8218835206822738ed1f268068a47d306aa527c3c62fe97623e13a852a7a7d. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/ITEDK2000168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0f3d3f580ac18786919ee1d79449a144d08d7a24cc6dc3f7495554649c6635. 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/ITEDK2000171.