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 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 0x9a079d07bdcd6d015ea04f8a09f2719739cc735a4d7d5e10a8f281b8da50d122. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4284c951-a91b-49ee-9bf7-3bb0b7db1f55.json and https://artists.proofprofile.net/proofs/artist/4284c951-a91b-49ee-9bf7-3bb0b7db1f55.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 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 0x4e8de2f62a298232c56aa9f1f808924e39e2e9245e4e5d3fa91420e1d8111e83. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/USCJA0609187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86968a22dc48689e67a6eb6ad8a6ffe56ac8fddd18a7c26176da3350fc76753. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/USCJA0609190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d9baca8fb646564fd44f3333007f275ad0c2c2b922bcdcbbd3a8128094884. 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/USCJA0609195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c63915c3f51f18568375dbfe36e278bcfb92183230f97d1aeec23d02146aad9. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/US3L61479704.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea00717c836f6e1d7cd733116c9e31d9a9957812ecb82b5a1127ac335b6f77b3. 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/USCJA0612012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c30ddf19311d87630257821765b2d675f8d3472137c2c41875a14ac2058c0c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USCJA0609196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c62543e691eb01bfd0e53f8ee7952805280de083d74aa9eb7a20a083417419. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USCJA0612009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfd60055d298577d2c90a2e678fa5867765e01bd26652ac8737fcc9fd9d75449. Chain 2 (Bitcoin): anchored in block 960199 (2026-07-30T02:30:29Z), 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/USA371432787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c58e00f205914a2a75c5102395f6726fcaa2e631e1078e81c69ab09c62b0739. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/USCJA0609192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x542e1ec5bcbd376bf3424c0496347426760dd41211a8beb19a7c5a96a070e5b1. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USCJA0612014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ff6fbee087966325d4a4e843ed002eeb421434751341521b056e9310a7b1efb. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/USCJA0612007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e8de2f62a298232c56aa9f1f808924e39e2e9245e4e5d3fa91420e1d8111e83. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USCJA0609187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb80247f6f586b05762faf49ec2e4f77398064066eac69703c0e69811e41b6bae. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/USCJA0612005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x507e30c188bdc013c13054c404ec06a64bd0db588d0cb46a465f38a58d528f33. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/USCJA0612011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed9b4342d09701af25b73ad1973dc0254f3378a286c26a91ef6684a6f5669532. 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/USCJA0602112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3967ae056b3e637ab0b0e52543edd910fd9c0ff74783f2c6ccde02d6719921. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/USCJA0609194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf86968a22dc48689e67a6eb6ad8a6ffe56ac8fddd18a7c26176da3350fc76753. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/USCJA0609190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6e8057662b549c6fdef1fef75cfa040481b1de1986eb91c0cc378a44ab7460. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USCJA0609189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80a2fe72357e46051cdc4f2b7110bf7e0748c6944855cd4370233c56b7950c15. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCJA0609188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d9baca8fb646564fd44f3333007f275ad0c2c2b922bcdcbbd3a8128094884. 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/USCJA0609195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73227f9b41c48e426f91ab175b4b7b51df1262f08bdec545f47b5b20484e9e07. 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/USCJA0609193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa11ee1b0a9a2edf83a9ac422f51d62413664bf906916c12a7c9bcd95acdb0328. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USCJA0611251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ded3da61fc6a011ad4487d24f4bfd046c2371eef815fc5fbe95fef9cad41b98. 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/USCJA0609191.