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 0xef81e8d6c75897527dcd766fb66e24953a572bab3b5e45f7a2954df86366768b. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4b966b51-d251-45b8-8c9e-c1b6a07f08d9.json and https://artists.proofprofile.net/proofs/artist/4b966b51-d251-45b8-8c9e-c1b6a07f08d9.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 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 0x372d9b322bc16303f68f656ddb11b6c84eabe58b04087cc1d65a9d6f65796ce8. 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/USUYG1285700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9abdee3ff946c69442943f67f5eafebf4d462207f96b3cd72686738f672ce484. 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/USUYG1285702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940592f519abf16623af081a7a7585690ce5976d8b917078789c5e11cbe5b132. 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/USUYG1285703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044570fafdd09396357cbe1d6f6120be0aa9d3ffc93bf7033764dd224cbf0e71. 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/USUYG1285704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b5ed278a0c4894a9e77a3c03e87f6e2129cf1fe63b3742ad8704a0ef83fd8d. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USUYG1285706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a67b4fe779cbad5db9809a22e15445c1ca105bf85b0b575257e6f63bd08b61e. 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/USUYG1261921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab5ec65c2cd09f8c163e7330916d4798ad15426f270d312292c58ff5dcb6b07. 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/USUYG1261612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a6dc2a1dfc11f406c9485c4e0387535f7f411755387402b1dc4cec7ed072cd. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USUYG1261613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6436b162c9ecd995b7a5a4bd31cfce69036f4057ebcdf8895d01d2f02582ae48. 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/USUYG1261616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99718a4f3253f5d0f91748f7997a040e6b694a5d6d59d270db04c56b85a61a50. 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/USUYG1240054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa593f70341f1de1f372748ecc387be3dce51a9340a6f1a5f3cf684055334795f. 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/USUYG1261618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb79d4323c4a20aa4f1d6c31e666d71b32f17ad7b7fe4e93942b3f76c0e7f492. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/USUYG1261620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5648d8ca1f54537b9b223fc636c733d3cde7c491bef99163ae39dd2f5dafa3. 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/USUYG1334539.
Paper We Chase (feat. Spunkie & Young Note)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798456bee5988b965812bedec5eb9c4e97ff4f44c2f19ab375de7b969d4cbf39. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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 via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/TCAEC1903234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b2089ad9cde48aa22480922dba8b90a0c488038a185304cec664723d9806e81. 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/TCADU1854914.