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 0x827d292075b1ff534f5346f0de9d1cbf2cadade9256fcb5ca5a534ddca933adc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f978ee9c-139e-42ae-b6fd-0ad3e4f314d1.json and https://artists.proofprofile.net/proofs/artist/f978ee9c-139e-42ae-b6fd-0ad3e4f314d1.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 0xc6899b85d02c000b7cc95976051e1de94f749351f32c9d9b614d1c2e5521c1af. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/TCAGC2285600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750f9a9b2e1fab3a4a6cb000b7664ae385b8a453d40eab3c13b3caa29f82ceab. 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/TCAGR2284213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4430b0a4440ffe33e9d5fd9509324eed807159346aa910cd49ddd871f9eb3ff5. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), 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/TCAGT2314217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65d5a414ab81660e02d33107c483c447caf884c9945f0f160ab3522185fdf29c. 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/TCAGT2361149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6acafb5edcc7b3161f952f94033a61ca03530e386cb4d4f4c2daed24ddc5cb63. 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/TCAGX2314234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395d8df9d86424dd5b94aad67416350b116c3d2596329c89df5ade3ac30fffc0. 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/TCAGX2372778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa2926608368155f2ac415da1b24dd97c9f1863152017311cb9180c8730e78e8. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/TCAGX2372801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x280945d1e4f62ceae65b9819366f9bb43852dabb9d9513ee39a8d1a70fd401da. Chain 2 (Bitcoin): anchored in block 958126 (2026-07-15T11:07:01Z), 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/TCAHB2369894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd68dfe886f7cfbe7c2de52797640adc991203bea4ad3071cb5e02b43b2dc2da. 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/TCAHF2341507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7653f3b5199b69753ce60723d4df82e7641716ba063e1f2174f0cbd2ba66ed5. 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/TCAHK2360240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626234486c67fd8d94fee19f4213c7e96d41951044eecfbaacb0c33fc91f0842. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T15:56:48Z), 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/TCAHQ2315137.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb583af102d6ca92896de1349778d0abd172002e9fe3e10c9ba79989718f1e66f. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T10:57:27Z), 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/TCAHT2308435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068cf40dc927a073a1ffa03a7dc7a1e98c075b8c61ce8da1d50b3dde156b53e5. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZWDE2412376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59bff31b80be473c8b3392e31901f070e5c7b6fbd81a89fa3ba2fa671bec5e3. 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/QZWDE2412378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f01984fed81d7f00c021b1d6bc67f263b89ef23ea3afa089616db8ddb5b54e8. 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/QZWDE2412379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd5b8f689444f46744ff2e157f5f43d54d24af4aca2cc4023ae658569ccc1016. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWDE2412380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31c1f23d13cb0470da22201b2077e2606aa3bc45df93cb546ac977f946772e6. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:28:56Z), 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/QZWV32460329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27a52df64307aef86d290f99725bde465415a341ca0483db7282e25a1a6f4e4. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/QZWV32460330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc46d92f055ba56b69f59ebaddf3e8e0051259026766bb970d70765eda06c8a6e. 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/QZWV32460332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc12e457d841a96d790fb4f4af0fe45cbd6533d869ca35fbe28ab2e594c3568c4. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/ITXX32400306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77959feaa12cb8c791af80f22a5e22fe504abe60a082b19cfa96fd8c91da2ff8. 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/QZTAX2433560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3cda2efe4b8ed3da9a66d9d6a179495aa12aa55dc8dbcd8f07816130db73634. 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/QZTAT2437703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ad5f9da51b3874723e9ffd9363af554915efdd0adf9191df3d3f6cc02f507e. 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/QZ5FN2529372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c90aa57c50708cdc6ce353e95877c56d61bf687f4ee1658b8c5e7f9302a691. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:04:04Z), 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/QZ5FN2529373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x414d92d398ce457da48a69c586df8ea1a966332ed932a58cc9cbd56d3b9eb176. Chain 2 (Bitcoin): anchored in block 959015 (2026-07-21T16:37:22Z), 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/QZ5FN2529382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d3a130c54a036abb4cf246b4b225d357210538f09b7f819c3193c1baefad3a. 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/QZ5FN2529375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e23ca95cdc9e7d633dea77e4545ae4162534eae1a5c92f3a848d707baedf73f. 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/QZ5FN2529376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31a8ad61ecae7796177df0821c4bc15f8a2da295f2883d42345f851a38119c9. 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/QZ5FN2529377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2deddcdce1260466f00d77d647e3eb28265ea625dfe9c1d1d9e46783b7beacc8. 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/QZWFK2405932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9998b08925ef03ccaad3b91ea2a5ea65bb439735afdb387238bcd9cba6d17e. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:24:19Z), 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/UKZGC2500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62138534e60579c111ad952eaf7b26c7fa4218f06f7afcbe83a8f3defdc37ce3. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/UKZGC2504871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6695fa7f455cb7750115009ec788edf294117b03a42b9484e13a52dfdea3401d. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/UKZGC2504874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2463ce294c6dec481f3749c87f60974644e156ebeee33bfb55fda01a751e5fca. 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/UKZGC2504877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8c84e83fadb1918ad446348de7168258c739c14c8647b70f8bba3d775c2c1c3. 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/TCAHG2308132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0450ebf034ca0a44e9520ada8ea84291e0748160f90de9d548d3d859c07b657a. 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/TCAGJ2271939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe31a619c8de83eaac23acbbfc04896faa4f5192951890f9081ce83a90ae88ea7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCAGG2250744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb30de63f374f2839a8f828edc881a38b822af7837be6456a73d01a8b9f96828d. 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/QZPLS2480048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x395d8df9d86424dd5b94aad67416350b116c3d2596329c89df5ade3ac30fffc0. 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/TCAGX2372778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75afe20c3ec1dc27b5d69152f183b594c01532bde5ed1b25f9e8ec02334bff2b. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/TCAGU2355415.
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