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 0x21c4d8720995c81db779efac933db757a2bc15f06b3f5a0103812924dbf21551. Chain 2 (Bitcoin): anchored in block 953754 (2026-06-15T06:45:19Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ad578451-9d42-4345-9fbb-1c5f6f955317.json and https://artists.proofprofile.net/proofs/artist/ad578451-9d42-4345-9fbb-1c5f6f955317.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Ximénez & Anónimos: Guitarra Clásica del Perú
Ximénez & Anónimos: Guitarra Clásica Del Perú
The Ultimate Most Relaxing Music for Strings In the Universe
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 0x3865ab515f880b5237b437cbb98991686fe3ca92ea323bef7646a466743e7ea7. 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/USSJ10700205.
Introduction and Variation over the "Marlbroug aria". Op. 28
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb9fad1fc9aee94d5f796b267d25aa7307c73c0b5a1a39c0488db7f7e4a66612. 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/USSJ10700216.
The Ultimate Most Relaxing Classical Guitar Music In the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37dfd8a5b92b74c97bf47ae4b83851a0a8e0e6d6e29f02ec8697bd4ca038cb7d. 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/USSJ10700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd96fe563cf325a45d5758826b7b0a901a53767fb7c1c0067f05e54ba51429942. 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/USSJ10700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d6391d6c6d2171aa4d2e2018d1e80345cee476d83a86293a1852982eb006ea. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:53:15Z), 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/USSJ10700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x155259ddd5a44c9b70e1f1c6e95c0f5853116d4794c3b8550c7842d7495f4cda. 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/USSJ10700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c8f0bc02c74b1c891ba82a2e35cbeb24f36ace3d3973b946f31d935ba8304f. 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/USSJ10700097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b33ab6b10e6bc34057ff748a32226135bf25f4c1862a98e75d0dd2c0db31c0. 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/USSJ10700099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9aae3b31d64893447e8db5132182840032ade021b30122f0213a214bd90f705. 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/USSJ10700100.
The Best of the Most Relaxing Classical Music In the Universe
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1a5f09461b43d1ce1ed7b746bc57493d54db18ce05e29750226f872a293118. 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/USSJ10400990.
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 0x88754131c94af256aa089e7816817dd4b5233b8ea30eaf31485fee83c247d626. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USSJ10700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0199c8b79c4a4fb6474f570ef6c23ecf5e9ae750a393d0dd2ca33c0cbe97925. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/USSJ10700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f072c58183bdbca6ba069005a510736c0a1fd66999376c22838cef5b0ed605. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USSJ10700092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3f620399546107f76202060eb3fd4a617a9f43a5bdfe00a089f473651746fff. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USSJ10700102.