frame|right|Artist's conception of a white dwarf, right, accreting hydrogen from the Roche lobe of its larger companion star A nova is a transient astronomical event that causes the sudden appearance
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 0x42cc47fb9be193b619586ee485fa892c6810df65dc1ec091d8a338cac32f726b. 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/5398a650-53cb-4c42-bb22-1c189db3549d.json and https://artists.proofprofile.net/proofs/artist/5398a650-53cb-4c42-bb22-1c189db3549d.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 0xff213712921e501a0aad114139b85be3d33831fa3a9466ea11eef7eb599a2747. 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/QM24S1926095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8997c738af045a06b545f005d70e04034db8b2e270cd9af49ef6a16782d59339. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:06:46Z), 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/CA5KR2169299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d43f58c1549005b4ca5a5a2334350bdc0682aee19388a6eba3b1cbbeae976a9. 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/QM24S2105614.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d40e9c9b5972777a30429c7aa6c6e80d3d34c04ddfe5ff47c6b4ee85ab4aa1c. 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/QZNWQ2144271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bce8fe44aa458f795c6b504b2752555d3c6cbe214bb45f15c2f878842c09b91. 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/QM24S2200247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x521d0d2863d45019cab9862909d6a0455a46f54348dff893a80db8441fea7b36. 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/QM24S2200246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05331c6b1c2b0e39b372a30c362e0e9f0a67c2a72fd96ed1cb8dd9ff60806a20. 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/QM24S2106582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x957599d54448fbbf779ff75d2b3f172fa36672fa374586f35df5afa0f6f80860. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T01:50:26Z), 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/QM24S2200243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e47a2b028bc6def082f03189cdc1169cc2d8187c92e915888781047b14997e6. 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/QM24S2200242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d875eca4561e7d8a6f803978dd544d2bffc30d494789755f673d3b145875a61. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/QZMEN2250665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a9fede90c3369c17975460aaad501031b3c891887331d76b2e9f3de76b7b4cd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZTB22285943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf27d37b366290dd1f0c4195f955343d57e6fe611175057327fa7a868e2c62a. 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/QZTB62262117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54fe9dc93535e0ea19d006190b4befdb024f299d90e3d0ed5f6e469e5be6dc03. 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/QZDA62307939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c85df4661f1a03b75e66a8f4e6d1759a4c28cb52f07ac572790d3998d318c7. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:01Z), 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/QZDA62307940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e63d13e19bfb17b6667aa170dce886beccd3498713471cae363e47ce206aa7f. 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/QZDA62307945.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb94fac0ee75d9bc927ee22c39e52ff5b2db18605fc601f7f36dfb763cb02f6e1. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZK6Q2368303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94b15b1542efcaa2b593af8d6b1fbccc86f2ecc841ab28cf34d4b988c3ee8467. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T10:52:23Z), 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/QZK6F2327428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf57230e5409a83c8dbf06f3e7c69ff0caabf554811c87f1a9ed56e00b6743e7. 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/QZNWU2362085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ec6fec398b0cc2a5071b92a4641f5eb4581d158bc404d884045b68ebd93859. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZNWU2362086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9bd6c60852fe797d25ca5d4354dad4d4c5784dc08233b9c054761ba72228f0. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T10:28:40Z), 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/QZTB72310190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb469fd1a5d3b26aba216ee8bc47bbae9aa35cce75ac1eb45cf907ee0cd6ed018. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFZ22485671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0935891d2c513dbf742df5a57086786d25e2f661eef0088e8e88736d384b61a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:06:19Z), 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/QZES52468475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad4030947b01d6d52c9cfc39fac8f37837a1acc1a985da3a4fbf4a280f0b937. 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/QZHNC2475996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24200142fd865ba5fad43e77e37096c86d9be3800a968cdc778ede3f95c0ab4a. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZMEN2453754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82012762d1dadfe166843e7ec0e3655a316ef428361838397d17c85826107a8f. 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/QZNWW2422258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326cb51b6d705c83a012f5117806d4c4d15353486221accf97dacb8bd619627d. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T18:11:05Z), 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/QZTAU2482042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe4be776bc60d43575c81202596509f7ddb8fca637e162f778ac0ce82edfdb33. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:13:49Z), 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/QZWFT2403269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x530252293219cc71fa442fbadd4a49464a95600b8f736f19b8cfb96b6f623ad6. 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/QT3F22485065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2fbda47be2221762d907c604c70c78027cc99cc242dde103c6421aefbb7275. 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/QZMEP2239567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc3a7d587034efdd078470cb393b90630f8864c0c3c95251303f212bd20e6e65. 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/QZDA72277168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910d1a3601225f34dee3460112dfce9145b7f5a997d6b15513caf036c1387c63. 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/QZDA72246115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3049798c11c7bff6b848e40154d3e40a1476309ec5b9e112a87c262a1cde7e5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZW9M2321231.
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 0x746bb206585327dba96705d5067095e867362824a090be870dd19d5c668945bc. 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/QZTAU2207943.