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 0x338a604f420710f9d7c17330a94d8ea1751253ed1139674f580eadb4c8bc9099. 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/da12383e-4fae-49ee-9d38-20d48ca211a0.json and https://artists.proofprofile.net/proofs/artist/da12383e-4fae-49ee-9d38-20d48ca211a0.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 0xfb4045e13d42b8e4c70ed5452f968f8e059abcd2094f46d2b57948f7a711f29a. 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/JPB621901274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91b9ffdb5af8c1b3481d4a47be7458e40e7fbf0bd28f01a49a9826d30a11afb1. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/JPB621901275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0caca2e9462f07d8146566936bdafcbebe0ef742528417d19aea79ee19c0b41. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/JPB621901276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0078358f6ecf3ac2c3ac280c4793dfed6ebcd3c680e62e2740f6b05ee5b03ee0. 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/JPB621901277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x327f43a05fea4c3f1a40d70e0276af2150659e4340beb86689ff36a942d4071c. 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/JPB621901278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2925cc97892426e7467dcc1f876c9a27c6276696a0ff9b7c3c1fa4c0efeb546d. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/JPB621901279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82c8a2720d9a01667236f57d801bbfbe93aa36493b097254fa9bc2bf17d763bf. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USN682229401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50bec8ab6f9e56a2c7ca7b3a61391c7f769a7919675be27ef35285cac96c3670. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/USN682229403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabccb2c86a8003bbb901071c9d0f4e2ff54c67948d7877e4535c33e8edabb4c4. 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/USN682229404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe211651cedc72bebe84aa4d63cb65e85ca59965bde7ead63cc8365347320c53c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USN682229405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc40742fd5e1f0b5f32c021319168016b351b82288dcf491a79b0d8943ed5c6a8. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USN682229406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07e97f10d530932fea168799db2ed2b85eceb2c2fa581f1ccd1a752b2bedfa2f. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USN682229407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f371313fb6396fcda9a6a3b9c2782ef0e0aba9492902de18ecd85a2483c88e. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM6N22480417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6f371313fb6396fcda9a6a3b9c2782ef0e0aba9492902de18ecd85a2483c88e. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QM6N22480417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f062ecc013f594824b012a20ab2dd1dd420dc96968125d169befb89874ca77. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QM6N22480418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3acd79bdc2a4a682139a560e31454255a70f28b912091a3a96b9121915b162c. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QM6N22480419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbff1303e481084732b60d918206bb0cc67b6e668507b429f35635b99ea043138. Chain 2 (Bitcoin): anchored in block 957741 (2026-07-12T18:30:59Z), 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/QM6N22480420.
One Scene Unity: A Hardcore Compilation, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839c2101d8dd1397242c23dcaf5cc4481c829c1f9d5db7b2222766e36ee4efb3. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/GBMJG2115792.