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 0x135593a3ad4f85061025f4334c2d3b712de2094cdaab3a438c0781961db24608. Chain 2 (Bitcoin): anchored in block 953596 (2026-06-14T06:21:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0c0ecf08-86f2-43a6-af82-cc4e103923d1.json and https://artists.proofprofile.net/proofs/artist/0c0ecf08-86f2-43a6-af82-cc4e103923d1.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 0x34d20043df1c44a9b22f383e2c9f01b2d8d1526b8e4c8d31432554a63fc920d5. 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/ITH711800079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce021b4fcd8a633ce382c95b43a332dcad49759f41c12c77d6dcb578282c364. 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/ITH711800083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26608c0dd5de85cea00af50a8bfcf275d2f96e1a57dc20093278c3c1f6a1888d. 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/ITH711800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e89f607b5e2c575a357d2e027dc278c28ce1cca655929eba07981e8c67b51bf. 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/ITH711800086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215541d479f3b5a4747b194b0157ed912748f5472daa51979ac02286e1483e3e. 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/ITH711800087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a51ff490517ae8ddf73bfdddfdd7f305e2ff003e35b7c732c6825eb5ad5082. 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/ITH711800077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd27e3cbd5cfe27cfc20af3d517c58561362568eeef1fab9dca6d462aefce4a. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/ITH711800080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a271dbadfff4d7cdb0f6aa2f5620c8637a972679a2bfb6e3842b7e864cf99e. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/ITH711800081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3757a287a612f47d6561e90d045723cd7a4fe4deb43f9e1a19fd83a8259030a1. Chain 2 (Bitcoin): anchored in block 960419 (2026-07-31T15:20:33Z), 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/ITH711800082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3d6a0c6eaf1db9192b98e5a2d4e6ba89ea50024079fece949960cdb430b7fc4. 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/ITH711800084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc53d24d59a368408c2b02523f93e61e1f2f4293d2fb7e2710088954a0a064c0. 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/ITH711800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb035879a666bf9cfbea636925ae3ef3ac499bcf7fb8519a3979924c6f765a52f. 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/ITH711800072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44bec34e891d04f1ee091dd452e180df94efd11cda33f6ade9b89d918f35070. 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/ITH711800075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x686a5e2d80d2f16242c041cca010f1c6268ed83e08616584b627895c3b53c8ce. 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/ITH711800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77635b093cf0ef1d13ccc0366613c63f9f9ae8337776209ad19bd5a8c9d11ad3. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/ITH711800073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ada81304d81eda89881724b1ac86a601a4a6cf975eddaea37067dd28376a300. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ITH711700067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6b001407346c3fe025c7a2683fcaf40e3ffc2b0bd7f9854dbc5e6dc184854f. 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/ITH711700069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b2f73344f9e2aa4f62cddba0efdc2f0e801f656da7d58634aec61f850ad115d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/ITH711700068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3e3adf9bcdaf3719076400dd44c0fc9ecd354ebca1ad4ecaed8bd396b44278. 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/ITH711700070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce226f2166c8aa12f982749bdbd84155605e44b2334cd8dc56135546667c9848. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/ITH711700071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3781d57f19d7c7668cffef5c38953263989425e1361daa9dfd18804ff8e932b. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/ITH711700072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfff86e9b01404e722f87a4c86321e8a8a7ca30fbc7f566a4efd552ef7d58d5b4. 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/ITH711800089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b2822be3be8bfa6d07e9c9513aa324d80a75f6e647a1782086520c05445d47. 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/ITH711800091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe24296ac632ce4c7212c9d05595c71d64b36fbfd4c8514833af8aa9ced43e2c2. Chain 2 (Bitcoin): anchored in block 960277 (2026-07-30T16:10:47Z), 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/ITH711800088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfb3dee61b365ff272d752fa4d6cc0fe64a755e7e2058c7ef76ace602c959308. 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/ITH711800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3c78c5eb35e4954bbe5ed918673674b59ae327b27cbc4a939107d01a25ab6c. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/ITH711800092.