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 0x5b12565d3e02cdb9d30c3b32afc0bbbf92084dd09b4796a293d8b4d1a7e968ac. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a8d8052c-fb69-4153-98ea-0f54c1524810.json and https://artists.proofprofile.net/proofs/artist/a8d8052c-fb69-4153-98ea-0f54c1524810.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 0x60a5324fce59745d2d339f2648c970ea3f87e1010cd5ef2440962819c53374f9. 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/QM38F2000036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab04903abcd1323dd6460b58f28c45165ccc0be650c6a6fac4521375ad0cb72. 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/QM38F2000037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970688b55d0177c993feb8b7e8796dca2fcfae68dcd6d516d1c0218a05756302. 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/QM38F2000044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9324b907b4d5ae6032703811f5d24c16d2d2c966c68205ff67a4ed8741eab3a3. 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/QM38F2000049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8349fc85285b917c983d659df87a79e698708df2759c63cda5dab45748465e. 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/QM24S1924402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x045bb1eb5b9ec6ce97102cc4e8120b0d6b9884889bf36fbc248b566d5a685471. 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/QM24S1924406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c8749e27684bb0716e79d5b9883d56cc1c464f36a448eab84b9c2d3c2945e97. 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/QM24S1924111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19f6ca23ef6c6b4d686f4c068c6754183da00a236ee667888aec5a3b921f523. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZ5FA1751961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a51811d384152db3cfa20454b7b4452669e080c26fa5ec21073d4e787d70f4. 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/QZ5FA1751918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5acf689dddfcf42eab89247e60bd11de778fed67b3fbf49478dddb42cf6843f. 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/QZ5FA1751964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf22560402e6327716daeb9b1aa92de570abf778286232bbc89bf2a462111b67. 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/QZ5FA1751967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b2d3647bf33dd377fbd947d53df7fe50b73d9c50d4f9212d3548fca6118b28a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZ5FA1751590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1742b70a90651eb15712ee6083b745abe2aa99cafa1af008659c4350d82c382c. 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/QM24S1907751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49c9a6cdae6c6d47de644afb09b90251a651b0b2939c6874b5234e8a624fc93d. 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/QM24S1817587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48777980abcaec13ee2a49024f716ca05cdbcdcc6561b744c47a8d6be948c2fe. 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/QM24S2001424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6415d8b1d75c7b40a49bc0714e655b10b903b1751c630ca03403d84c789d0732. 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/QM24S1913774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a51811d384152db3cfa20454b7b4452669e080c26fa5ec21073d4e787d70f4. 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/QZ5FA1751918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x710dd5555d4373acb1ad9834807e21e7c85f40cfd60a1fd06ecfaffce03bb121. 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/QZFZ71938785.