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 0x7074784aa7b7c13db5ee92506adb052dc812aab9064e4f83fb13b4540300b739. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fdd13b0b-86ec-428f-96c2-1a5f50467815.json and https://artists.proofprofile.net/proofs/artist/fdd13b0b-86ec-428f-96c2-1a5f50467815.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 0xf6e3dc827a640df5efced06beb797ec3ae53cdfc1c03a1ed4647de23ac8a42f2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE2H51000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535781badeaf37c269dcfb7d7285d87fbf662b68df99167175cca9e44cad53fb. 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/SE2H51000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a0f6e69d0bb32dce4338c7c8009099ba182cb2242b0dbd01c5b304fa7a77407. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/SE2H51000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e7a1fa6ffd886e62d3b53f82a0ee7dad4ca7b170e21103d3cab817deef1bc0c. 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/SE2H51000116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b386fb9575cb5573a6562940e205f9707dcdca633ba7989cc67aa644433a1f6. 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/SE2H51000101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x535781badeaf37c269dcfb7d7285d87fbf662b68df99167175cca9e44cad53fb. 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/SE2H51000102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4960cd0c9b7e7ba6ba79dc6b8a686612d5d740b619d05ea57d6e36b902e8447. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/SE2H51000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eee3d14630d922f98017765ceb087d319cafe29d0577a28c317e7ed839f0f3. 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/SE2H51000108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02e30cbbd2ecbcb18e77b8af6f7baef89a8324eeb89ff78286720ff5f779b1de. 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/SE2H51000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbb65143bead37b6c18f548df0128df24a70de1ed2e975c9df803e1718d75e8. 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/SE2H51000103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9893dad582ad8ca2793e364c1055525226b25a3c73a849e491bf95d038403773. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SE2H51000120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65de79b71e277bda846ee92131facbbc313d052a2bdda16913dad8b8d2da8f5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/SE2H51000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf05ce59f5c3ce38ed27798b28c560f37ede80ead07bab869345be97791206a45. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SE2H51000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf2e8f5eee00759fc0e5a391335b3c638c865bfdbbf7fc384b739b2500bb166. 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/SE2H51000113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37f3cd674d05faa87715ef9d9eed6c0330ee76bfbfe9e13359546534131d1464. 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/SE2H51000104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cbab0c7e8002bb2f618adca28c79d1db6c376fe4090a821a2ad97ad264b5753. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/SE2H51000114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dbe8a563d75dd88e560c2d42eaa4c5dfd972251cf50a5b0fba93bd7c6f9a23. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/SE2H51000105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431fac38c599d02e1bb45527439378d609769d8bfb2528483bf227b7ce8d60c2. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/SE2H51100101.