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 0x3f02aceead46aa743db5afe027e9b9a0305552300177ec107b538eb03fd8424b. 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/6f1192a5-20f9-41d8-83fc-49ccd4597760.json and https://artists.proofprofile.net/proofs/artist/6f1192a5-20f9-41d8-83fc-49ccd4597760.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 0x47fa56002f7280f9aec63adbc3eca82d2132513fe9f160cfc4f98f2308ea97fc. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZ5AB1764057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537bba44ecbdd8f408a74401cb4fdcce2f88d88f166cee8c38c56751389f9523. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QZ5AB1764059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f31e3bc338160d0e9bfe2b929ac377bd7f73f85ee1c55f61f9dd17f3963e8c2. 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/QZ5AB1764076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f75c31f5146a488ce49f8436709793f00f70600e235eebd4956220a43fb59ce. 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/QZ5AB1764077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaec08acd1611e413a6cb2a570c8440d62b0aeb495828a08f522efe93d73e17eb. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZ5AB1764088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9449cd489cd9d3e7a6e83a33c749bf30d13efa524b2e8cf16a7cf1e77591cd8. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZ5AB1861824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa1c989737b970c17a6b303f51bd285970ee04973293778d97d5922a21ec7261. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:04:06Z), 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/QZ5AB1861829.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab60fa26332474c7219a8d6b4abfa4f6b4313ebab9456e6e141cf1229a3181a. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZ5AB1861813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889f91846802d440ce8e84986f92d43c6644421934576a4c75f51540066ca0f6. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZ5AB1861817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f274779e6c596dffe152674f9612f3fbbad997689812dc4efb5d1e4502677bd. 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/QZ5AB1865262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cf2a457549fb65b10137d647c7bb6479926364a8bb1e1368aa4479eb8a77883. 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/QZ5AB1865265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc66cf62df746debcbdcc4a5af1ae0ecf9de61e84ab2f3b5922533fe5d7c2b8da. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/US7VG1733173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc37aa148d77e09dff34676408ce17a34aaebdd0ea9dabe1c31f6d0067e17c8be. 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/US7VG1733176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x958fd9fa286c7365e13321ffca2075be1788445063fe8864aa588aa63391397e. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US7VG1733177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0a9f5055361f6addfb6c35496f99be09fa3afa9448ece1409b03e79555c6b07. 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/QZ5AB1749480.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d99fd73c68397da23b90796348f40d852aae993843c611e83e096bba2fca4d. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:43:17Z), 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/QZ5AB1793975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66ba81c508a657a87f6b369e0f82ff939ff36b212c591eb425a228d010fed3ef. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5AB1990845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fec3c798d9d62164b67f2424e2097463b68e6b88ad7a7a5edc0154e19ce88e8. 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/QZ5AB2065067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6b9d30a1a07804969fdd95a936b702c5a9073f6f9e5f1b2b08e2cc8754e0b3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZ5AB2081642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d61474eb541809cef15e16241c44b3f79aa58625c8572a3141cf19cbea17b9a. 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/US7VG1807196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da6f36bd60bfbf442ab6c32d069b7279cc799f5b83c57bedb4a4450d5f6e4f6. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGLS1927889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56e465c5f5cd9a5dcc7525f2e7258b4c6862efe47b540afccd5f492f9db8ed2f. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/ESA012024734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf09690b0bf1a3949ed85b7c9358ab1bb6c645663032776a309f51645b4983cc8. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T08:01:22Z), 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/QZMZ92021845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x668f7cdb73120c653a61478939ec1d4841e800852c4b11d425b50d1453a7df3a. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:18:30Z), 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/QZNJW2392782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34cdc1d321aff47bdc933a65692f238bd7153a049351402cf5579c0c9d9f69f6. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:11:12Z), 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/QZNJZ2372285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x559f5aca31332e1dd30d8d1eb75c4654005ec3657383d1457548676771b55cb3. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/US7VG2450385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d3feedb1e96d241746a5f3bc0657fbe0cfe38f6c50712498530b3e632c6ceb0. 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/QZNJX2489810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae70ae5c60087647907fd73fd73aa5a4214e6939c4373dd1893f9ed8a23245d0. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTPX2466161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc82e6ea720650352ab7f03e7f66fb86cbb6aa28199e102006f131d19bb128d3e. Chain 2 (Bitcoin): anchored in block 956748 (2026-07-05T05:55:59Z), 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/QZW9K2422226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe26309b9053d4831258954b8e5142b0e5bcd7a160df647966cf86faa82675cbd. 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/QZW9M2411822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0c238d37194103b1906b83023e41adeed82be66df34b2cff70b67c333e8de5. 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/QZNJZ2206574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa697f1930c3b53940d16d160a535c5ea08bf1d5d7aae90d8c5bfed11537ab6. 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/TCAIB2467853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc45f541d8d986fb99124f352f94d784d021c2047e05c651f71a2bf5fc7a3d154. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TCAGK2246369.