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 0x3f2ad6ed2de47c89c579eb1b3d302a29a74ef270ef1375c51dd0dae59a43d076. 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/54247b83-9be0-4261-aa54-0edaad258ba2.json and https://artists.proofprofile.net/proofs/artist/54247b83-9be0-4261-aa54-0edaad258ba2.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 0xfa85d335725684461f84f356ea89f0b155dc6bef6c87820a52ee3de4a8addda9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/AUGBT2344660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ea55037adc74773cd4046fafb446f42fbaf79fa5445af5efa0a460bf5a7e74. 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/AUGBT2344662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc701830ffd8f51c37260b65b36727ccd316edabfc7fe14115424b8d09063fa42. 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/AUGBT2486033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe03014af2019a9a825149ad06709fc7d383eb9f49cfa8f4a63ee90eb499a284d. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T08:26:31Z), 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/AUGBT2485899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910372de18704cfe619ef71a2c4dc9c4781b332d9f1cd215364f61fc4b9c74a1. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/AUGBT2484249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a76c276abbbb7a0aa9c2d3457c31987863ca371d7c59e5c05533243eb764a. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T05:19:29Z), 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/AUGBT2485301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ec5d79cb6f747085c919e82835f0fcd75e7f2e772f8d24d5a4bf8d076b4ca2e. 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/AUGBT2485302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9de563f1e229096ba10fe6b7a1be84def64dd305655a4cde6693c3070930e9fa. 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/AUGBT2497670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59476bbfec2303d0ac4f2743100f895d0d3fc92b9e46c92747be72dabbf248b7. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/AUGBT2485303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c52a32b6d844ef3f10728694f4724b5c18cfacdacb983ecbba16ed1f25837e. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/AUGBT2484243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910372de18704cfe619ef71a2c4dc9c4781b332d9f1cd215364f61fc4b9c74a1. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/AUGBT2484249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fdc14dd1a90db38c367150786ba8fe79182825f9dce0bef5bec4785f9dd5fb7. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T14:57:42Z), 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/AUGBT2484250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7a76c276abbbb7a0aa9c2d3457c31987863ca371d7c59e5c05533243eb764a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:48:07Z), 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/AUGBT2485301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e6dd8292d9917279b41e5622f5f59061047313b2aa8f8f79721804338ca75d9. 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/QZPJ32429983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dcaaa8e46f193b0f7aff9d6d74a914b348b34841aad9890da818b975fafc82a. 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/AUQ9D2401789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf18f7e590c9f961cb2d90938e57e7a69c145f8d1351e9a48c1eb98a4768858c4. 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/AUQ9D2401795.