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 0x145e9f12bfc2e3308a0468bb001f454f8261b3f8ac05ed5485812100bfa12994. 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/b77e25d8-9c74-48e8-b782-6ef02777c6f4.json and https://artists.proofprofile.net/proofs/artist/b77e25d8-9c74-48e8-b782-6ef02777c6f4.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 0xbbe4690225b3b30e5a58a53d4f9f34feabc2df59b88a8359fb3bd53ce01242ac. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/USHM21971212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec6d5589e319803ccb483102fb51822bf8214f889421e739f28a31ec12ef57. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/USHM21971213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x116207cbfb06828fc4905334c0e2f5f13fc6e5a85b958e6a71dffe07dc3f2e43. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/USHM21971216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf3cf9ec0cf911c0052336ad26f1ba7e5f22f85c46567c11606b814bf8b5629b. 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/ITM462100033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ba8e9ec544e3024d1c651e25daf3ac68f8126e1fa5629a8f1f17b00354809b. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/ITM462100034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d531dd7dfa3c3c2fca2f16b17870b971e07db077ce78902dbcc596bebce8a62. 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/USHM22234571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ebf2b1db64b1ff16852c6177c6a17d0eebe575cf3b1477d35d694ab223afd2. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/ITM462300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9705753103fda6d2f68167db16d710df313778e27a8a46f00ca795f5f73aafb2. Chain 2 (Bitcoin): anchored in block 957611 (2026-07-11T21:33:50Z), 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/ITM462300164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc84a2481d4682b9195e91670f20b12bc10636317de881b734b78fd125cccca4a. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/ITM462300165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ebf2b1db64b1ff16852c6177c6a17d0eebe575cf3b1477d35d694ab223afd2. Chain 2 (Bitcoin): anchored in block 958380 (2026-07-17T07:07:02Z), 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/ITM462300159.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97409a000967a13609610f2dd3043feda1af0156ecae7361e40b12d0d9c2f134. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/ITM462300162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18fdeb9c8829f6690334eab75afeb6ad9e120e2c7f8cea57c02702b5f61b50c4. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ITM462300163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68fb1087c31ed253081cd4057b357c713b4548baf1f8d2743729ea1ca600e576. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/QZTV32418217.
Rat Salad / Jack the Stripper / Fairies Wear Boots (Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b25c29afd6ad10f0bdd21dc7f1fac9c78b098c14d8a971a524b21f976a4085. 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/QZWV32542100.