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 0xd22da0fd5f959308a3b2d9a3b263999039cf5f819d92af0ce83a92809a818c3a. Chain 2 (Bitcoin): anchored in block 953972 (2026-06-16T16:31:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a7ac5b1-48cd-4246-b2a4-c8fabb5a13c9.json and https://artists.proofprofile.net/proofs/artist/2a7ac5b1-48cd-4246-b2a4-c8fabb5a13c9.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 0x104cde512beab06c4ff6787bdd7c75572fd12d9e1288f99cf2dea2a71cc7978f. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/CH0510400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92babca775878b86dd439362ddc65a20bb5bca23ca1cdaaa58b82402bcd3872f. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/CH0510400123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x416ec00e9c4d73abcb7926643870d67386721efec92f8f740437c5a601059b6d. 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/CH0510400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b90dad95cf9b61c7a10bd1c0f3f601fe9f995eb12304adcdaf8ff3f862002bc. 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/GBAAN7000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2393fbd6ff199d21667ea46f6591721a6a827decb1b756561e750dc42f8677da. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USMC19031709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeaa442194dec11adbf3aeeae1e877bef71f6b79089a14198ae83e9b3e9d130f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USMO10300927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x311252b9a8fef5715299a6c37195c8514ea3a88b312c27901e412c78068100f4. 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/USMO16490001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d5f8363504192f1f1295af28e357972995db306cd4b9a9d55e2f2be29885c8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USCA29000091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cdb7dacea2f5faa2d81b796352d97e992d4b76812c7580bfba6af9e48543eba. 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/USCA29600298.
Papa Was A Rollin' Stone - Single Version
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6791e359a7a028a9df42ad391d121cf6fc0af3bac38a2bec37b5a377e1c81db1. 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/USMO17200080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4bb7ab4b48198e30eb180b45e084b52ffbe8614a765d032acb3bac0c70719a2. 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/ITUM72201346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57abb375425ca25f5e60b22e56a549504fe0464d12d3f028ebfe00532c96169. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/NLE880200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11065d85cc29c188deb50e1d8aae0665a128467f6b34264160d2be9cb1f8398c. 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/IT9009502220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c14029ff07e230a0de6939c70a384346893cd93e193f1d9bdde16a8a5ec66d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/IT7009301870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b7f4b04d5412513e2f61223ef0246962b9e35d8a2b53097ea323d140bf90f25. 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/ITUM71501788.