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 0x7eea8feeab7bb1aa22553351c017e1e5c4efbca99f7a93eaf06b273908298238. 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/431f0cb7-55d5-4ae8-967f-af1353a98e78.json and https://artists.proofprofile.net/proofs/artist/431f0cb7-55d5-4ae8-967f-af1353a98e78.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 0x0fc176f62b559a2753158286ca4932499b2f80d29adc44737180f70cc0acf05e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CH6542013428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6906b011facdbc609d86e8e943d2c3eab6e13e3fabc5d04076b55718c92784a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CH6542039211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf296b87552cb1c98170127a32efcbc4961aa3a26bb6043c26ce9506b6ea8b26e. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6542097451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b657e4c67d6a87db47b112ed2debe953e81036c869ef5be52bb14cb87dc32f0. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CH6542116648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acf5e229753cb035495d6fc221fe6a8ca37ab5c48cb9b4eb3ca81fd616cf98f. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/CH6542116649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4fa296dfa553a73ff3fa8d83e6854f5be9d2604ef297de494e5f31f6296eb18. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/CH6542283492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0157758a82d7a2205085af9a13445ca4a70cc2363e23a2ae69ce12485e20150b. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:21:28Z), 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/TCAHI2373126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3f801e3a0f0052391520432262e2b2a4aeae140851b8e7ed10e17b9339c792b. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/TCAHI2373298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ab3dd0a125566dbc5fad98a00f2d7f0c1c465152bd829f6afa3513a8a48314. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIG2424190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3f4c60a0297de6664ea4c0075e7ee1467706e5c65382149b4bcd0a580a975fe. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:34:54Z), 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/FR5R02400920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ce8aa3709844ddcf0635f43a57a367b4b77eee4815195c3a4168598aca833. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAJF2594262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdaf19b7fcf2a4cbbcb00cf2ad0d1348db784103a96c53c63ec049c9cea2225. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAJH2588225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a474e1967a0d1d7e2a75e281a06483dd1d5efa158593158a6a76e5571300aad. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T05:55:09Z), 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/TCAJR2571313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81bea9257c67d7fdc674428e5ee270a408897a1d07585f17c30556faceb94d59. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/FR9W12533336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2756b33e4b07f99e0e7a7ed346338a65dcf09ec780820eb98a8762fa1c6da6. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:40:40Z), 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/TCAJR2581566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa590f3a47e5b854713651ce6558133f32c7d1ba81de1be119878e1cdf4f6ea. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/TCAJR2533625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce0ce8aa3709844ddcf0635f43a57a367b4b77eee4815195c3a4168598aca833. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAJF2594262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdaf19b7fcf2a4cbbcb00cf2ad0d1348db784103a96c53c63ec049c9cea2225. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/TCAJH2588225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaca039fa1b03d9ceee08c619e6ef4e8687b23c3f33d00580478b4c2dee9fb30. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T22:17:04Z), 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/TCAJS2581864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8affcbe9d80d0eea7d23b13192844683613006abedc64edf59e7f8910f1e673d. 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/CH6542015597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce73732b5b38d360e946f3fefde584b58fb48420e34a02479fcc2809b52b3da. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/CH6542015607.
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