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 0x47c7ae9e259e1c93e4286f3650d6dec67a1eea26bb5ed87c2db1a28b0134f7d1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4a577ea3-0e4a-49fb-acbe-d367b0ef1a82.json and https://artists.proofprofile.net/proofs/artist/4a577ea3-0e4a-49fb-acbe-d367b0ef1a82.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 0xb9952e72c62c78fa761f39cd6c1075d3058d837b31e92f34baa5a6ff86899edb. 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/HUMAG2009354.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189c267209ebc6c91e385a5cad7335e72a67df96683ba4a29bfc1dfb79382e6b. 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/HUMAG2009356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c9b91f3b9ae88796ddac29354211b4e31fcb74979d7e15c9b41b3162363b60. 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/HUMAG2009357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fbbd16f55c4fe2a2c8369b976af9b7ad0f4b8beea3237c9526ee3d2340e426f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/HUMAG2009363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dfac1abd7011e51f29c0f822605a9e71944a32c8bb96dd91c5c77fc04d6653b. 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/HUMAG2009353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5adf37da6050d95a8b34ac0fcb21c688217fb8ee0ff54ac657f016b298f2e5d. 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/HUB001200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7ee9fe1f20aeb3225b21d1829ac1d8b2d8dcde8377852108d86dbb00fc04821. 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/HUB001200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a32aa897db89548fd8e3601b98e6e549125da76397bcc1add8e555621d23a57. 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/HUB001200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c3585d7c9c9eb4c3ff44998489eee6c436095d05be453662c7c1c2ad1cce2d. 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/HUB001200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddb7c292210e4d1a80e0da46f86d58ac88b851aadeb8c29dcb56bcd8ad0b06ea. 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/HUB001200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb77bc37187acaa40a38b3cfbbcf039d9405ae077b4cb7b84653b4ce22df44cdd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/HUB001200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07104d19cb324355b744afe02be4ed372ca36d56ffa1f8216c93f2b205cd60c7. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/HUB001200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ea7a53c1fc2e24f9d3334aa2b9e4b0893f4faea4d9374aefbce7c6f97257bb. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:28:41Z), 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/HUB001200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc38f994801c78f97bf96c67943f48cf28247c1b3b559dad89b8e835fd6f09e. 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/HUMAG2007453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc72ac1b8f558d68a2bf2da3ae29c56fbfaa00acb277178cd9afa9bc1edf993. 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/HUMAG2008088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb56d3361cf4dbab2606c7a024ff2f53438bdea107382b7a6c2d83b9711068f1. 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/HUMAG2008101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7c7ca25fd17ae44f08cfaeeacd66f7ecf5596c099f0204e2894ab3ed97d6be. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/HUMAG2008102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef52e969ab3a0b6da2241baba196da8294548602f400b927c5e0c98828783610. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/HUMAG2008104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3fbc47fb53723b0aee31318bf20862dae702c265b94ff45646ef5fd1ae1f51. 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/HUMAG2008106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d1ca20e6114ba711bad8ef970b5f69e46753b034ed9141ea9ba3807bcb5a85. 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/HUMAG2008103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f69abd99b63e29684a6b1e3a12c9284b21dbc4d1df1bd9df6daae057d11ea. 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/HUB001300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaaa30627d8e8c25337faac17c8ba365e4555ab9401f8ef096bb70b6b9424c6e. 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/HUB001400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cd8b77ea46916a66431f7d2923b6b379640106658368507748a54306c436803. 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/HUB001300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848f69abd99b63e29684a6b1e3a12c9284b21dbc4d1df1bd9df6daae057d11ea. 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/HUB001300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d64ad5daecc6d11f6a55afc649682a270faae54169a8671a9f9abdc516944d7. 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/HUMAG2011219.