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 0x8f78448ece61dcc5060c2fda3b169b799d4622b7377855900222672f7d187a76. 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/8d8783e9-c2c1-4264-9943-1f19f61e97df.json and https://artists.proofprofile.net/proofs/artist/8d8783e9-c2c1-4264-9943-1f19f61e97df.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 0x3e30c534d6b822d635a3e0b7ae7432d43e6eb00c2c83443ccc832306816d9ed4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZW9N2255210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02afc5bf3e7126eca00077ef835df0c6bd225db15e5f4cc9e4825bd629db4aac. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZW9N2255215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30d34b5ced0444c15152cd90305949e2a3d7367c930ecc320cba6c0aab935390. 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/QZW9N2255221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65571bc94692aa0a9ffb8ab8bb661401e6683acc8487cdf2a98cedf08b9e55c. 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/QZW9N2255222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2da0244fbfb94f32f3b5ec22d166fa13b6a6d8c3a7e8f39b22a0b49b7e009e12. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QZW9N2255242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f85c871428e4a15101172f014c6fc729e5ba8eb3e08c2d75c0f6e5352ff98f1. 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/US7VG2210235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e70adf11ad84a5e32d8a0433e8c9dd36f3818ab1ff3449ff6f16eec69d0e634. 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/US7VG2221243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6d8a7f094ccba6e7afae45e4131da9e637253045d42a7d8d2b6a9e0a01e2e87. 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/QZNJV2183566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8831afca57ac5b0c530212917ed008bb6ada40277cfc60dd351875fee9d48ffb. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/QZNJV2183573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8040dc54aeb102494eb50808ba7b76bac23238e287b45de37e59d24464eefd63. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/QZNJV2183574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb64147f6d9f3e3cd89f0f3176318faf9d82db818ac627d354722ebd6228a6c. 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/QZNJV2183575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf643bdfa21b16637d38b315c5300277c53d3e209ed518bc2b4ea115f09f39c2. 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/QZ5AB1840705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c86418efc31a987625c9962f4b151816b9abb24f9f73b82277bc85fb9a96b9. 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/QZ5AB1840706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbece2fab7bbcb43837900c70e134e1436c185661e4fa147f22d9895857cb5b60. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/QZ5AB1840707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00d94e3fb0826dcac838e8422b53457e82b37724f12279f70588eebba97e3c2c. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/QZ5AB1840708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2f7ebc8474392b490149089724ef0e83ed1b3ce90e02332898a8bc3cdbac47. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/QZ5AB1840709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0b58f062afc47a434f6f52cbc9c5deaf78efcb7dd4e92262df834fa1d8ce5. 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/QZ5AB1840710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba48c23c7987226e78af96af93a93132a9cda84494bb8dcd53a40ace30ee8d35. 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/QZ5AB1840711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde1b845bfd3e95c4da7900eff4bec5d5750c58596fe2dee228f9ed99affb053c. 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/QZ5AB1840713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeee9d1e7468d7f5333daeade45829cfd7d994fae3a022b03efa96b998dd10596. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZ5AB1840714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c17e310837bc0150eb2a9aa1ab56e541d0655d2a0a252f4696ae3bf7a8da4e8. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZ5AB1840715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f9a37305ee36298baf94be51db87c5b2b2b9fe1a680eeade09de2037d652a6. 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/QZ5AB1840716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce8be1d7edcb045743809b47b29f637a0b31fb4c19bc1555941d6729c02813b. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/USX9P2067621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0650d3abf402b27a8e951880215649994cf0aa7192ebf2e1f3ade09fc50dd782. 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/USL4Q2323349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d7ba5f9e3eb6e081099ec5d8b6d2be693cac3af769153a3067667700376ae. 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/USMH92392232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0106ae50df171a3ea7c3ce3a2638b94be9d6515b63ebca17f449e4257fca2aba. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZNJV2384199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510ae2345aa003d1a4749c4ef985223a12ecad71b334cda82e134987d7e972f8. 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/QZNJV2384202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe141e1403bf6da91b6f47479a6d69fd539edc1b1b77ecf198c0f51cc61fb4249. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/QZNJV2384203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffbac4aa6e777ba20b59dd6cd2b71c0a826fe7918dfae065c67968cce136f72e. 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/QZ5AB2377836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5788b942f3d05efcda7ca02b888d5b9ed0b265750f8840fb7307085f23a6d166. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/USCGH2337962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529f223cc7c2e04c77db516c55e50555c0246a7daf82f3ffedf940ce5bd1ce3. 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/QZNJW2287981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850f2f2ac6bec03bec264ca9da970c940caa1da74b22990fafd557958908a776. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZGLS2238626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044340f00bad33f1c20af51b7a349eac8923a79ff77a716df115a72240d7dd73. 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/US7VG2217102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5740bd7fc8818b0e013180ea19d2ae6955d092177d268034e2c8db0be0a44dc. 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/USHM82013656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcc2c8f6c17542d3474693b49e40f1deb3b24f94c330d748469f95091761136. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/US7VG2431567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc83c9b81f4bfdb15566cf8c6fd3ce6681407979dbc751314fe29503700a557ff. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZHZ41922848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec1935bafbe0c21f58f0e5fccdb7880896654cceb8a9c7639674bb1ad6b5b30d. 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/QM6MZ1870468.