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 0x1ee7804382e359bca537224720d11895d1f50401c4e2f0246f95c55bf3e3baff. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4aa053ae-cf88-4938-8b37-6ef78123770a.json and https://artists.proofprofile.net/proofs/artist/4aa053ae-cf88-4938-8b37-6ef78123770a.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 0x3054b63700e1bede68a6f7d968d9fc7b781483adc22296c3741d2ba2806e924b. 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/DK92A6018303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf76700711afa8fbf81f3156ac1f158bc2bc38fa9c9ab745ca26ba5ca3cbab6. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DK92A6018305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8379f57e963e4ff4a164e0c765194de4f9db7c401753db877db47c7e82dacab7. 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/DK92A6018306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x639836e01f760cc695a53fbcea361261612b5d0d9a4199845705a52a399060a2. 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/DK92A6018309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1b465a08e0d2729b9e8269479077e249923047c0eb6bc4397eb44cb75d3ecdc. 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/DK92A6018310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8797ec51950b24c9b6bbe75a0e5ede787b55021d3c36e492d556e551f56a318. 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/DK92A6018312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf80dc53077c1e32b89c4dd2c7632bc897219ab9d80c812e00c57ad204c104f52. 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/DK92A6018313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb727ba8c92c81212004b4d197bd4fa877fa1f6c76c71ccd4a5a7057a68a6cfff. 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/QM6P42093976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e8c964fbf0cc1e5e322ac387adb5772e352d62600e360821d79bbdedb1bb42. 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/QM6P42093978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c1a75ada83bb9db6b251a46c5241a1fd864e431720412e6185e14bea693638c. 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/QM6P42093993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c6d030bc4d3f3bada4ae85294756492577dc46289e116246a9730c7442808b. 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/QM6P42093997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dde415ea708ee3d49f24b6594a0566e90ea351a3a301c3d43f9872f80bc26a5. 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/DKDH71500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87187a4d8f36958e6e93c16e7a66cb95ea3b283010478931464bd6c67d31ef01. 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/DKDH71500202.
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 0x88735c759ee9f6a9e5308d8fee32d02b38e8ae8954bfb6b4cbdedd046dceb24e. 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/DK62A0600609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a1da7761c19235a3a36cd7d2fd3a33ca63d5ee088c0cedb6b6e5411d3d93e8. 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/DK62A0600611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609abbe742f04c47f33fc8ddaddca3df2b2808228d35af7a605ebbd1d17986bc. 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/NOBZY0501030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf27675d585aa0ebdf6c050b2cce2725feb7ccda3e97d51f0ea954880e6eb4fef. 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/NOBZY0501040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b76dcb33189241af60391cc5350874c64a67af88b49ce226b23c345db7b790. 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/NOBZY0501050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4ef47fcb9536fc3e0424061e42524961b96d731189992f2a23d62424a4fc87. 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/DKHU71000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6738f967429773034da7e7403b964e3e8d590eca823dbca1fc0f2cc07d27c1fd. 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/DKHU71000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe31b652cc6e821e2b83b335b19d80814f187293fba3111bb3051415f7851fc. 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/DKHU71000212.