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 0x595ea1a5e2380d05d7a6db02c91bb9ff7020b4c04ec6884a1b1d65f8f96185bd. 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/813e549d-24c6-4b5f-821d-684438e4b54c.json and https://artists.proofprofile.net/proofs/artist/813e549d-24c6-4b5f-821d-684438e4b54c.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 0xf216de551caeac83bc28ba857c67ba6ce1eecd42a592d748d4993bbf7b495fc2. 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/TCACT1652506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf96f3c5d6e2d1ec8db04846a96ef37ebdcf84a8c2dd3bf6c56cdb9c7f4c46809. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCACT1652507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc833dc9ce556a1269cc421ca0ab47efcefdee4ec27cc3b7ec822c627013af41a. 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/TCACT1652509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831aed795da990ff390420279629bee41a89b86b2324a6cc6b80ba47e5fc049f. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCACT1652514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x644002b1bca3cf63513fd1f0377bbaf234703712fe38eecaa88ed20d7622ff2b. 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/TCACO1614160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e7284c5bdf1cb241d004228aff63e97e5b6ea0497f27c7792fd3fa992e693b0. 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/TCACN1626303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x382a9352c03a03e1855a1da059deb075f1e8e7fa282cb9dbea564cbf68188b98. 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/TCACN1626307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb79a14f369d65e36ee65f0dcde26ac6a7037a71462c45b70ab1dba427d014f6. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/TCACQ1642642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0f35d91618db14d6a33bc69bc6e6989e1479df01ff26bfaf6bee9522ba8d3b4. 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/QMPKX1873348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x267366cdbd88c812d6e7e4d77201e89ba53b0d4dca4dd6885df55e6a178c4860. 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/USHM81799138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27b111cc66770f2e7935cd85a9a35cda88d4925c6310340b0d6b4bfc85333efc. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:26:45Z), 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/TCADP1844986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7cf4e6478f0be78ef3356d91af241922c2a0a662fca67a32f22da9c0c13b4a9. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/TCADT1840791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9ea31575382356ce43c6527c97f7b9776f57a3ef37a53c11e4c93154bb6568f. 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/QZHN41905405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1a9657f8aff4857c457034096a0efcb346ef6a586945c3f61438614a617d33. 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/QZK6P1944424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44a10cbd87dd3ad2e1768411d6dc8b0a76d3f83c13a1eb8e1e16eeac4db1d057. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-17T00:39:41Z), 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/QZES82134041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a5d062253e47b40e8bfa53d332c9f358f7f10bae564d2743fe435298c0f716c. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZHN92136536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x861e77e69e84c880ae54daca2cd35198af049f24f4c8087ba78922d5c8ced2af. 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/QZK6L2121216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c47e4036f5c2854a57cac445cabfc02188b56410e6d4aa405eb37016eee30f. 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/QZNJZ2173963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0096bb07c5a4e4a19ace1815f62efba854dddb472110373dbb08d5d8473fcf67. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:40:28Z), 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/QZGLM2272510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01b0af9245838b68fc9d63c113d58327d03854e6681482ffaa51e5495cd91ec. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZMZ92280671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab9f5c36f2b65349b1f3266db2d3a04b289c13972b3af7029f461ac7ef8316f. 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/QZW9L2282121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc2d663a5c6290acd64b7d6aab4f454739a3fec3077593c5f1e66abcc40e02f. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/QZTBF2465262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7939fc886fa9a7cbe34cbd1195ea76fa88f36920d3cb402870587625ebb9873. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:37:45Z), 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/QZFZ22593235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa389a9a343539b9e44d8c0272b1d822933ca126e73b5495d065c9de8f15ab8c5. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:03:31Z), 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/QZPLS2561342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f57372a1905ed531a00ddb22288672ac26172a6c8e62c051ae576c93810f6f. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTBF2539356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6898e3af1fa707670b650c66cbe98f38bcad7bbbbada3ece109c91d23908c68. 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/QZWFG2557986.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bbbc653e327466e887e02512981a54bfe9f54314eecacca7385593d5b67fcbc. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZZ7V2515616.