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 0x91b50ffb968c57806deedfd886b77bae5001dd1b8367131fde5e54c67f2d56eb. 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/77032594-7f0b-41be-8089-b56f693170e3.json and https://artists.proofprofile.net/proofs/artist/77032594-7f0b-41be-8089-b56f693170e3.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 0x86da3f536a96427ed4653969072c98693b99efeab04150bbe239d7d4ad71116a. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/DEH261007411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x943b56691185176d753420f3367382ef3d265276ad4f24d1cdd2f82e0c3103a3. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/DEA591331001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e36e8bab6c071c58110ca47e0328e3b56d7bccfa75ca4245d48b24b91e06c81. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/DEA591331002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x393424e3f3877dec970f207f8a9672e41d5ecec6e8dc95b87afde1ff308cf70b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEA591331003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x923c6d4787327f6b6d7f3283595d1785ee715855c1e2909187132f8c2ea38da1. 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/DEA591331004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c95311833b75087419c2533396149b2357b70ecd3790e06b46c7024e6864dfc. 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/DEA591331005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb49d6ea0169f0e75bcbbe87fdb556314955148af29d3704bafeea7e3fdd0f1. 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/DEA591331006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa00f88138463395a7b2109bb4e9c99cdacd45b44266a074d4a6939b1431c666d. 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/DEA591331007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ba6e954cd90d90d8f839ac1027a121cbc89dd3c90db30b4d81773422f7fc73d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEA591331008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad51a20de4bbfdf1ffdfd1237602e2553497cdb303d575cf0dfb356af77e452. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/DEA591331009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55b7e73c5c470ee2bb81bbf753715f98e42d1825c79cc5873fe482443454b048. 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/DEH261210718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x164e53aeba5609d2731a25ded362b7dfe7e3d382cb01d53d73f1b89e9b7e1777. 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/DED992500060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a3e072489ab39fab097c2dc042768967a31a0968f2112c98e91a1b144a44877. 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/DED992500057.
I and I Survive - Umberto Echo Dub Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c21a645c021e825bb7be1b33937036e6cb39909459fb9d6d353940be757654. 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/DEH261410302.
Komm In Mein Haus - Umberto Echo - Dub Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6747842b00fe35dfda47c2a463ca8eb29ca8d0d82ae5e94b5bdf6c597442c0. 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/DEH262217709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9cbade6183362f7b795f2965f04a8a36cdcf0887d2059c071c3b53efcf431a3. 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/DEH261511009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19dfaf29d12f3adad0d074e8c07a708d920bce0435e1b64474481dfe0fc6f3c2. 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/DEZ651703777.
Under the Influence - Umberto Echo Dubmix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b37e55c80c888e45497da34644e81089a0cdf02a1089cb438e85c820042bce. 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/DESE82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7826e8128abaa13b5ae3f1e663a58bda4d23f9cf97ece5921a5e96a53b1ce209. 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/DEZ651720070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3a1ba041ac31fd698ec7067c196d96a85a3da8bdd739bee9202474f184fd984. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DEZ651719501.