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 0x23d618d39bf6f988ead0ff41641856d85a7e460d48c602b40d821c80a3f4f6fe. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/9ae1120c-fe38-496f-9f73-8bbc81534d1c.json and https://artists.proofprofile.net/proofs/artist/9ae1120c-fe38-496f-9f73-8bbc81534d1c.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 0xd31033a2a47ad4f5ae0e7c493167b034d77a748fa7f5a8a3f3d4326de9a7a4b9. 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/QZTB52391446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f2199ad69a4a124bf450830a9a45fc96650d613dc9e918fb3f66cd445d9db9. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T12:58:49Z), 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/QZTB72378679.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38882d0f1220c06f7b14ff883246fd8f06070a0cea18511a4c97a34d1ba7a748. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:39:56Z), 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/QZTB72389160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x745fd8dc21dcc827b988a4cbf30f3d42987ba5c5c0c2bfe91a02f3c1fa32343f. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:31Z), 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/QZTB72378271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb979f5da9c5b9c105ddb758daf830586ed2e407d9dc1c200a72e556483c148ff. Chain 2 (Bitcoin): anchored in block 957892 (2026-07-13T18:21:16Z), 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/QZTB72389149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72bdfff839a836914696df4b2b95904db62b606f5a705364a19566393886897d. 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/QZTB82328439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35754eaaf5d0c63e6f9fc3007aebb38f005af1b413c50d288f3bac13d0bb571b. 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/QZTBF2319085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2450d795abcd912b4203ee7deedbcaa40a2e8a7bbd096a44b5496013e5402651. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:09:32Z), 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/QZK6G2404917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c0f7e5e2f748e77af2451d172292f3886754286646ee4c64ea298cb96a38559. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:25:53Z), 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/QZK6G2406608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed8f74314265fc52faabd90b242a4871a66a7b07dd89ebaae7e088199bc8c9. 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/QZK6G2406629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967a084f7e1bddf78cc0c4280f63ffe04dab4ca44ce3f3365ecc79c650839895. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZK6G2406605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7413eb32926023c7ec25bd15f691374ca70acb11ea0e45a1de6e7db5c434bb30. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTAS2497309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd851d0cd02ad74558f1b73b2a67417b671bcbb913331b82921c3390550f94b38. 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/QZTAT2411623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf687ffee8bf6ab159374ba97c1acd137bc96b8026880ced5970cb3f7e38810ba. 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/QZTAS2498660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e51d41751026f3179afb7c6baf0adf0cad1251f1e86c94d4c68a11a9b1965a. 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/QZTBB2496084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53e5203e4b3035edbda14cdde897ae1eb85939d6b65d33fc86df427d709a16a1. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZWFS2438344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dafc191cc924809a55325a10851a38cc3562c55b1a42a8959dadca7045fbbb0. 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/QZZ7R2425476.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b85f2abcd5adeafbfc0b283f91e509d0bf42feb52652ae2ee055c2b95cdd85f. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZZ7R2427599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a5b9af019748a97c3c9be3d792232912a7dba687901e97cbdae75eaddd252c. 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/QZHN42534066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec4c6e633e1c172cfb18610551df7c98530ecf5e2df6a9cbd7ad49e0cd926f4. 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/QZES82518014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae2b31533dcd49fd83f84c0636865ac5cc0ae1289f61f0980885843b9554b12. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:32:42Z), 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/QZHN52556154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9165d432a796a19b1d96660fb310284c9c8b3b6bb92af0b7310fe18e945b7f7d. 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/QZTAS2495785.