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 0x7dc39ca23de8429db53f6ff423bfc2aa08f6ae8ee71d7ccf7ed9bcbb184aa098. 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/36e75c7e-5ebd-4eed-8d56-8d781520a9be.json and https://artists.proofprofile.net/proofs/artist/36e75c7e-5ebd-4eed-8d56-8d781520a9be.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 0x570fd989b3384658d763210ce329c09b47900bfb76bd20d14cad22ad137f7f9c. 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/GBKPL1786499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729e0fd43f2c6761f3fa0b5b9dd6acf96cfbf3242e80ad6048aad6d23761c704. Chain 2 (Bitcoin): anchored in block 958368 (2026-07-17T05:03:25Z), 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/GBKPL1827050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f49bede6680add95f4ea0f8de5336050df2f01ac65e6b3deb2ab691d463ce7e. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBENL1902660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef5ff286097bd63e7431a7cf5cf303e330bc2e5daec45c3074eaeb935ce06b9. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T10:09:30Z), 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/GBENL2002669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a14d575377a860dc447fe5830915f76529334c098d0cce905661bbd3fde6c42. 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/GBENL2002670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad2c65f4cb854ed8da59b8d68182be754eadbbcd21fbe04529596ffed156e6e7. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GBENL2002671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae1f833c7b119b399bbbcba934256cbdbec45d222ca9f74eee6801c7e3b4caa. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBENL2103009.
Big Skies, Silly Faces (Roosevelt Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbad913ac8e167f4bdcb4929b08bf4487685e5aae424109037c46a701010012e. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/GBENL2103001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dddf300a5ba2898a2435ac7332d8e4c8a96098169d3f36c882a8f22ac2a6ca9. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBENL2103002.
Deep Down Way Out (Heavenly Stems Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x732ead239b6cdc865d22ed4aa3818750dbeaeaa219b2551bdc68669141826ce6. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBENL2103003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca3208a8aab506f5ded0fe88f6c19f48b3973653074b5e530107aeab5c2977a. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-15T21:24:46Z), 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/GBENL2103006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71fdc3cf0d680426aa412bca5017882edaf85ea2912b84c3c289c7bed9a17de9. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBENL2103007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37559e7b3be7f74baa513f675ae85d50fd6d59805fba97d7ad7f1634cdc1a9e. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/GBENL2103008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae1f833c7b119b399bbbcba934256cbdbec45d222ca9f74eee6801c7e3b4caa. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBENL2103009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fead412e07d60d1f5071637c8b3388a26de621ebbfcf4a85b4557b9fbd50542. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/GBENL2103011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db7b37e22f838ea8cec1f1d7649d7975699a15b95a639e3da5154a8f285f9d9. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/GBUM72401764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb7055ba66460a61efd226cd7c979b9a4ad24517c1a42518c1b536ba25961f2c. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBUM72401759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb1ebf392fa2c3ff135f2d21719a3ef273ad04eac157383563d8b67542470831. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/GBUM72401760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9b8eaf208f782012680846e03d9f3ee49f457f4dc095d89eafc5f3c5afae026. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBUM72401761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf753d5a17dadb789deea8fb42c4fc78d3fdcac81127c2f214b22617ad2439222. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/GBUM72401763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9860dc34f9d4f3e64d1b72da8671fe2e8b7dd40330ca45ec166216ca8c75dcea. 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/GBUM72401765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbebf7dde52cc489caa1959c6aa1f7023a19ed3bef042b9c000c2c81b116ce6b9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GBUM72401766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33279acd36af3250f91cbdecb2771a3cbd01b49dc8cb83b5f5414ddd2c4ac17b. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBUM72401767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdef37dd55cb534639e46c5cee7f57d309fecc4da5b3d8fa4efe12ddd0a416185. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/GBUM72401768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45ce35f74f7eb745bd7f44317f6cf41214c432e8892940b56c8f2e06403cebe7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/GBUM72401769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68414d75769f4ed3380e9a2649a552dcbc62d1b652ef1c0dc877ec04b3b23b00. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USA2P2475606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b7efeefbad3c1990b8114a62eb41f1b3c3af70ec11500e4e0bbdad129e5a99. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/UKQY82300005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b7efeefbad3c1990b8114a62eb41f1b3c3af70ec11500e4e0bbdad129e5a99. 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/UKQY82300005.