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 0x7f6d8b6590205f93bd1b22f838ebb3e51ba797e97304ffc5aa800602f2087943. 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/2137868c-9bea-4a4e-8dde-9cc0077b594d.json and https://artists.proofprofile.net/proofs/artist/2137868c-9bea-4a4e-8dde-9cc0077b594d.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 0xb6f1412879fe9e00afe32c142463f6c1552779c9fe329d638da008020db1f006. 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/TWC019402840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979ac93613d83b8227ad0661f9cd9f5377dae7d95849e5d94bf380563d469308. 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/TWC019402860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d9779291418bf046ac45eca06f7600c6dcf465529f3bc3226999824ed9041e2. 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/TWC019402870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e50b3fbe9ee725014809a003fe3c89bc428aeccf6897d04f10a1a97608549d9. 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/TWC019402890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x056532f857ad59d266ec036f7e340749033c87f37ae1e3384f0f56c80cf02a08. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/TWC019402900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030830dc061c259d7a293c4db698e5b8d555b4d06d49ee4a6d4dfb936c862f01. 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/TWC019402850.
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 0x12a7c410fd77e7420b8483a6531ef906fe9e5b54188a8cd10f1584cdffd8c903. 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/TWC019502020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4edafc281bbef3c9cfd3a9ad8f5a4907c463cb65dbcc37b1c14b82388cad61a9. 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/TWC019502030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52b7fbd5f168f1746b0f384acf0b42c3d0ab5bb15c33b1617b45556872c25a67. 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/TWC019502040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe57c30021508deb3b3655959e3f415e1c426c60196bb102d836aedfdf1671b08. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/TWC019501970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0faed86a7328e6a53c05c5df4d19c77db49326e1c700f24e9f5f1d94801d3c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC019501990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f663acc297fddf06dea7b9fd96da037caedbe9f75975d4da2cff30997e68371. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TWC019502000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba148fba8b3f191cf36368d7345c7094c37ee10fb27a1cf824b649801849a277. 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/TWC019502010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d53534c19c18d9cec80e9f1b4862621b0dbbcf5416a993f346396d95b3ca9d. 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/TWC019402070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2d7061e1048e939b35758cba866938c7930e25b8a530396e71b6d0fa11d410f. 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/TWC019402080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bbc612270102842d90a4f343ed3bec99c4b432d7afc7288ce10de9d69c0f6e9. Chain 2 (Bitcoin): anchored in block 957198 (2026-07-08T15:54:54Z), 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/TWC019402120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02977e78478777f6d413118e61e4d544047bce48220fc33f9976ccbbcbd7f5a8. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/TWC019402030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29f0b629c3f555664ae446afdabc710f69a0bd8cc13081b2e46307d9fcf95438. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/TWC019402040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb9de6b0bdb83c54259951b056438b63c91062b8d2e6d63cbbd1cc5665427551. 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/TWC019402050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc9a43b41dc3f0a8b015e9a05cfca5970167c9b9d8dcdb6cc3cea5d8b2f754b7. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/TWC019402090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x004a957da897d32b08edf63f62d8691d91f95b206a118bcfe4e527cebc1ac8e4. 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/TWC019402000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ffca107aa399d54373b54652b5c2d79d028da5d87c9abf9d60312eaf600fb83. 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/TWC019402010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24b719574672aa41cede183e9854a39f59a5f19d32d482d1632408ab26d501d3. 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/TWC019401960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2267181931f7eb6d0079ea62591df44a6ed43d50b4b4d4960c2343cddd79ca0. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/TWC019401980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a2988e63092e3a40a2f7ee39af1d7f6ca6d525869f71cb6cf5fa154494aeb63. Chain 2 (Bitcoin): anchored in block 960298 (2026-07-30T19:26:00Z), 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/TWC019401990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2dd42be8fe9bb4ddd21a6785da3a8424522869f61b0ac5af51bc87acf7aa7c4. 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/TWC019402020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe83a9bd2b27546ccb02dcd0d61398757c800c48f791b6e26f41cc8ce829d8fda. 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/TWC019303860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb25d6153b0d45d751b1afb6cb4aada0baa26b18dccb2c06e8bb17324ac6875. 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/TWC019303920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7910f0b87fb608eabc449d1634fe2f38fbf93305cbbdc50c1d8a06c39d50f859. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:33:33Z), 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/TWC019303850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2547b631cdb169f44d4e7b516f49300c3129da39bf688a30ae47e6c21fd2c88c. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/TWC019303870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92b792737799e3b401ade2bbbc44b55aa9a558bb106ab9aa1fa57f27e70490da. Chain 2 (Bitcoin): anchored in block 960268 (2026-07-30T14:53:07Z), 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/TWC019303880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d9f347b3302bff6633709a288f2d1276a9e9dcae29e2fd0a2dffeb70fcce7f5. 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/TWC019303900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f3d0dca011ec1c6599ec1df428f5c418bed55c8e6e1f7a58f32a252a2e479d7. 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/TWC019600550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x827342bffb15148b53b2b9c5a3e1480d14db013789085717bb3dcaa8a560cb1a. 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/TWC019600560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49e4a747a2c7416b9a70a92019de057dd073da5277f3b4c690e4551c65d7214b. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/TWC019600520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4577c744fc211df7527180416d5864a45c690b2955ba407b771ea0022d594871. 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/TWC019600570.