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 0xb27db50076dc26de856e5b120ab06d4a203e8c3ad51006bf9cb5c0d0dbb2f775. 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/f47303ea-e518-45fa-b79e-b3d523655418.json and https://artists.proofprofile.net/proofs/artist/f47303ea-e518-45fa-b79e-b3d523655418.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 0x2bf0cd52be9f42313d703d4a183be0af3b862cabf7b39b5a1d93249b5c446943. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZTB82295400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc86d24041fd4b4381b61f06256d32d8a3d1b94107df3878fdf2932da96f2f215. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T19:11:37Z), 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/QZES52341806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45fb276d65c67c568a28143229f80efc85d2497d5cc8791021e6dc85c766a68f. 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/QZES82325229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb40f506de198b7dff078e5964cf47f62d143663b23b837f51d0c687e07ab3783. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZHN72363707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba1ab1a4f249842b9c4dba989b8de1ff8751ec5387debe00d2c87e35bb27099. 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/QZNWU2380540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ece3e785e6560d117763bc66fcfdf71420bd8b0586373e95d4763c32360d9f5. Chain 2 (Bitcoin): anchored in block 958355 (2026-07-17T03:11:50Z), 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/QZTAZ2386773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8110bd4175986ce3060ad7438bae063dfc427fc4c7cbf8c33d681d5b354987c0. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZWFF2394758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c09f93e7c6390da55dbc4eebcc13c42212ded867eb1355610f4611f9df9028. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T19:15:00Z), 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/QZFZ72437711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b8373399034032ab1be00e8e03510b1a275ab9f5df63d603a393abbd001f2. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/QZPLS2411479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dc10200aebb5c6863f8d678b05ca49291b14a9731811b66f29e2fe5d20c51f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFF2449378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7015297f8029e2fdab8a0460167a58a9e477c650f777386ae34930aaede272. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZWFN2420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb290d8b75ff0f9f02b3a87118795f616e0c009135c3255344c613433acc6463b. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-21T09:03:28Z), 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/QZZ7P2428237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62dc10200aebb5c6863f8d678b05ca49291b14a9731811b66f29e2fe5d20c51f. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZWFF2449378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f03c5621702aa1a825d5c354fcd764f3a0a1331d75424af748f95b9e659bccb. 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/QZZ7P2428229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242b8373399034032ab1be00e8e03510b1a275ab9f5df63d603a393abbd001f2. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T07:01:18Z), 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/QZPLS2411479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb290d8b75ff0f9f02b3a87118795f616e0c009135c3255344c613433acc6463b. 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/QZZ7P2428237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7015297f8029e2fdab8a0460167a58a9e477c650f777386ae34930aaede272. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFN2420032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f7a9dcf55c1f5accfcbfab70422968bca9d492d39fc81dbe101554e3d79c52. 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/QZFZ72590702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20299c41b78c083556cee3a18726468e1cde63df3fde03c393dd1a755f1e89a1. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZTAW2542782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee47743118f257345b9970654f9b78234fedc31f2a2e25d1e8df9bd3cc6f79d2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFF2581112.