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 0xff4a2bd185a47a530312ff4f57b3a78f6e8d7176a0a7e451d4f7aadb27d23166. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fb06a6ef-e377-408e-9d28-400078fadffc.json and https://artists.proofprofile.net/proofs/artist/fb06a6ef-e377-408e-9d28-400078fadffc.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 0xdfe53f9e1f2fe36836daa4bc0f251c6b682ecf8cc95dbd3c82f3fdbd96add315. 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/QZAKB2411556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc548ba2e01ce1f623931a6053982674d76009886ca43eea6c8d788292151545. 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/ALA082000372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b20c2995b8ee9c3a98c3cb5f640d7a2972ecf272350048dc2a7a69252fd34d. 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/ALA081900190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c59b279c36606f5a47dc565a7eef02bf6c4cbbcc66d43baad1e29d6e142ea77. 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/ALA081900191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x468174f3b6f87f87053679738f8548ce32c2adb58626dba5f9632025adbf1c47. 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/ALA081900193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1629fec15e47cc9149c1d368b0f953dd2c4bae9ed96f685c4dde0be1674365f2. 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/ALA081900194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf530d555cf95ed0f2211249644d7f105a91dddd6fcd44f5cf637c1f12976a5d. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ALA081900178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x419723e3ce57e5c509499158729bf65ef8bc1cb19396555153585531f1996189. 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/ALA081900180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72151a8cc460a74248bd3d294d44ed22bdbb2be3ed3c7b6b904ba0d9494852dc. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZAKB2461706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d60cb77c2c92a7e63db0e565d304897399febce3b8dbb19be0b0eae5dab13ba. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZAKB2440886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05fb955eb4348e7d71eff092aa9cb51b67412c637e28ef0ac349285ba5511585. 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/QZAKB2436759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10511b0131beb0f17bd90ea0b25571bce6a700928e32a8016d741506320fe215. 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/QZAKB2379963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ce68d7f839dcc35a9f19228a2240389028d593b7e0497052cb135349d7ac031. 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/ALA082401831.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3232400674df3b68cc35715bac6ac0916ba6000c7de6d3947c25b935ea2ca7c5. 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/QZAKB2369039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff9632e2c69eacbe655a034a1b653e4b9dff16eec3a006aa235ddcc9ed0c762d. 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/BGA262339091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa94edb6e6f5a6167c96e1aeca1ccc435c2fbf60e5eede9e49be7f4a1fdf18da4. 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/ALA082300016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eedf27eb60f8cf55b8709a9125e9afba5e4d306da2239c1faf527807dc01526. 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/ALA082200366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6daad184d752903b8d182b068de5d1f87b280d80f575012b90e164bc8016eb5d. 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/ALA082200199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85dbf3c7d8880eb9e241761ed586189d9475c7de11a093281c361d335e7b25. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZAKB2376986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb709d39379c245e190eacd1de0f2b166db5f88caf5414bc67918191a2dcb53a. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/QZAKB2379439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2a9732ea2e13525a2d6ca90693299c64eddbcf840084af9a357881a692344ec. 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/ALA082000329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6032890531f797ac8478b36f29775526b8bd47ec5b7fc58fede6ff50ecf0d6c3. 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/QZAKB2379159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc3ca00138186fe7634f381975a4f1213e06639f98d5e1f18baff894b0ad0f20. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/ALA081900203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a4f05b6965ac70b5ab400e8369c375c102bd030b5f39a38312294df8f45fe7c. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/ALA082401797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef87f2979ef86aba068f72ee1febad45c1dfc1622f113ae2cd0e769c2d09e850. 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/DETO41813615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfba57df6d997906dc882a93b580e335ca778d5296c7a94a10a0f6553121a8cf. 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/ALA082502498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9265a091d54b39cd01cb1d451fe38e560e8fc4c9c461e10c655bea9dc6091bcd. 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/ALA082100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d98245988b0f6a0551e7bfe39dbfe2fec4530cc9227d18e511c4d32ef791037. 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/QMDA72448851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc10125f11e41518ff94f35e44abb0e1953792a303076b4736e979248c8fac2fa. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/ALA082301756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe01a4e04e17f9775e7809376a262a56f3a4308bdb93365ad034c7cd8b129b362. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/ALA082100301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf91e3d04611240e53845b01e2d342d2d7ae1e27104965771985c6ae9536927cb. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/ALA082300003.