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 0x362656619a9792c93bf62bd8f3a618c3456458f68f988d39591bc68d47f9a862. 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/7d13a790-c897-4b16-9c37-de6f503b1033.json and https://artists.proofprofile.net/proofs/artist/7d13a790-c897-4b16-9c37-de6f503b1033.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 0xa07ad77eccc642a319125433bb919e816d52de9f05bfd608e1391585ef88677f. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:50:42Z), 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/NLD321900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fd82fb5d9a7de7da52f5d5a5be392fa44e8d34ed132ee2a5a2672238eb4d6f. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/NLD322300151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55a4b53e512a89cfe87aa416699cc21e7c3fbed6d6405e851507b041ae364e2a. 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/NLD322300152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb356fbf5c19a3a6e14d9bdd90d4634d78c786c15ddbc0da74ad54ad673408380. 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/NLD322300200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d69f84a37f63bfd5ba5b9040557e75d52831792bc68924ecd7540e1a2b8b6a. 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/NLD322300153.
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 0x012687741840383d454a7fef75a9c4efd40966652c6cc52051023d625926e910. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/NLD322300155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d548e625d0b98dd6538b20e07545dec3215ce327726db54beb8ec884d5b38e. 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/NLD322300156.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba6dfc991e046b389a6ac17a31bbab28f596c03a59c9c33ff6b597e1df7bd3cc. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/NLD322300157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff8376ed69add83fc79f42ad1f765601c41b0886ac61f61d804d0381a9a44c. 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/NLSB72400590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14e0b890f53d4d4af6e1c8f1438727f4c214b975dd6b97472bb6f3b6acadd71a. 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/NLD321800262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182e1cf9352886d8a4701e3a798a666a0f9777caebe8ebd98e9747d75f99f028. Chain 2 (Bitcoin): anchored in block 957084 (2026-07-07T20:41:57Z), 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/NLD321800252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3ed15ed27e422153041af079cd088e5a949a2e15a219b982bb50fdacc42bbb4. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/NLD322000240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae8c0d7fe5919baaf66a7d9e69bfa701b978b5bb57ee546398f4134713e1eed. 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/NLD322000245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0963abd67bf34528f6ffae0e4140280385ca44e32a7aeab18617e0d9af8455. 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/NLD322000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202ea5b9563488060257115a06f29adb0e1e43686823cba057c1cff20a32dda. 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/NLD322000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96a403f2f7fa77d93a827c4f9699b4b10bfdf80db3a350d4745c101254d9ddd2. 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/NLD322000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x841d36490ee41ce6732ff7b03ceb7ca7f053fb7563f104d40b30665120dd1b43. Chain 2 (Bitcoin): anchored in block 956859 (2026-07-06T01:42:12Z), 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/NLD322000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40af78fc87ff7dbc7cc0907ea141391a5f5c17e8abbcb1a5c52b2b8c1398c84c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLD322000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa37bcf6e562be114089a526b02cf85177b67b08575636e6b651a35c02da3004d. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLD322000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f0963abd67bf34528f6ffae0e4140280385ca44e32a7aeab18617e0d9af8455. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLD322000216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd202ea5b9563488060257115a06f29adb0e1e43686823cba057c1cff20a32dda. 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/NLD322000173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5ac11a3d0aa21b9ae2f57ffd38f3737ec0f6bfddab4ca78615ec94db22dfc90. 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/NLD322200109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d7bb4cd921d320dd2a23e593a863d72f814abfa813993b16264b9c61ebf6f70. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/NLD322000100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966f0d692887a77d05ceb31239cf8dd394f2fa871be1bb3cafd4a834acd5afe. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/NLD321800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd78649434a819d550d37408a0438d657fdefb43e2afdacc3f5fe90754e971bd. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/NLD321800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242daeaf74411af10e6db835b852924d3e0584f756b77794373ee020d2b13448. 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/NLD322000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d516a0db263473ba08b5440fd67c0b85c8bda259168fa8967589442bdd78725. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLD322000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184d0b8badb757d94a7687d611ac77908caabe5d8050975c606c90f5909ba9df. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/NLD321900052.