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 0x45dee89200a6c0d70a7ac41c2565145eb5c7ec19fed1d608d9b5bbecce2b5a03. Chain 2 (Bitcoin): anchored in block 953842 (2026-06-15T22:22:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f1dd21a1-fd3d-46a7-940e-2e539a531419.json and https://artists.proofprofile.net/proofs/artist/f1dd21a1-fd3d-46a7-940e-2e539a531419.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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 0x861ff6a2b2d82eebcc0070a71abdffcc2b5d8c5919c6d0059b6de93c66cbf5ed. 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/NLA410813442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c638899993bb277e4a34620d1a0f72986fb981d1ce0b9b58e32276b4a1d2412. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/NLA410813444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439088007f635d8f589304d6b838fe7e5118b16e94542762cd69e4ae8659b0eb. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/NLA410813441.
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 0x2b5e676c8da8bec1d29c23a612d4874bbc761c9fee2b4878ccb39ef69d0d1ecc. 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/NLA410815478.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c4a7f036b2b891f92f60e22d063b5a8d8a528eeb96c588dfaa27a9e0fc90c2. 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/NLA410815479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ed05870001d74e2491b3c778ae6e0c16643ce1dbcc99951296fb1a0efbc59a. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/NLA410815480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51cdc7a142a86b20dff170fa2c3a3dcde0c59b0f3d36ab3c4d45409de2288c5. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/NLA410815481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaea0b0ebb9a217cd3e91a9474b6f812ad3b3762dfa59f7e8210e47d39649b91e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/ITC000852301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41e9b255d9361a9eba894f8ffe7ca43e8c58bbe3c3431bfeb3c5ec43bd4d495d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ITC000852302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76fe42b85089087628c93ba17dd274f96592e78a8f1332c27e8bb0bc8f443517. Chain 2 (Bitcoin): anchored in block 957026 (2026-07-07T11:02:43Z), 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/ITC000852312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ae2bdff6363fd14f409029e0cd1aa9767d449eb4cdd0f4752df7725d6c12c05. 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/ITC000852314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2caa68243b64baa2c2beff52b3187b3e7fc93fb5c45adbfed7979a199c285ec2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/ITC000852313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69cdbc895596a11b4c912ef86b868dc4cf52397339ccaf586e10573958a60cd1. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/ITC000852315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac34620737c3e5c237909036aa9ac3d88227f9f80f951fec7a4110b38aa2f61. 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/DEAM82000164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x791bb732d42952404f90a01d0deecba95a1a0547e32eab6df129d561426c395b. 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/DEAM82000165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e00c94d2c07cfb6e8b1f3afca42adc42b95d094e1a9e883ab1721a95ef395e. 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/DEAM82000166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b1ef9a5f14fc3afd2420662529e9126a93a030eab53f4c33094da4037c4481e. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/DEAM82000167.
If Music Presents: You Need This! an Introduction to Enja Records
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4deb19962aea6dace462029781010db7123bd4f4d8d1e1633117159acfb12a7f. 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/DEAM88700016.
If Music Presents You Need This! An Introduction to Black Saint & Soul Note Records – Compiled by Jean-Claude
Boatwright: Selected Music for Voice & Instruments