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 0xf6a199b637531e9e1c9921cefd92099c8dcec1e87f4f6780012bdbdfbef14db9. Chain 2 (Bitcoin): anchored in block 953713 (2026-06-15T00:33:41Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/80975441-62a8-4b12-a57c-c35a6305683d.json and https://artists.proofprofile.net/proofs/artist/80975441-62a8-4b12-a57c-c35a6305683d.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 0xd62f3c542a97a3c402270743769a0c2a8ece84d531912434580c7bad986a86e2. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTB42234818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5a20f942f28f08f899f5c43d68378666f688ba23d46b62407992d4f2661e8ab. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZTB52266148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd1815cc1b338a4d8f4d274bf9ad8bc24feb3961a9384fcfbb97a657a9e99e9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTB42234820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63029bb4a2f7630c5908fcea057a3ec408d40cf194c7305cee9fe6c0274dcab0. 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/QZTB42234821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18565fd4ad9a5e40cc178dc8b4766bc32bffd77a9e04be19cb9a8b6ba864f93. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZTB42234822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6afd6216ec2b7abf646ff7b71b62594ff4fa91e7169b1cb4bea0fb6e8af14aa4. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZMER2484333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb57d307650e50fa2170034cc1009dfa58919794dbe1d33892c8b2e064a80d6a5. 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/QZQAY2502700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bd0f599d035ff4336e25c8a88f7ebe3af74e0461305156f1287aa028e66860d. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZQAY2550408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cd3b1f8ff9b5e3100701e96e87d74f172ecfd9bdfb941b8fb5f646bb16b1ed. 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/QZQAY2578852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e1ca1a0030afa31b490074f4d2865c5905465faf49a7ae57e8aba53bf5079a. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZQAY2514778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7624e5d03ad449be1f6e2bbd5bf00d1f11e0cd771b9f45fa3085a2496a54bc27. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZS7J2575507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac71b56733226aba0b0772cef6e765b53a500e415d6a1d91eeb4885dd08b1b5. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZQAY2510329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9788a395166b7f62c6a8c74a4456b2606b1b3e027ffea8e4a703e9d2d20fa97a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZQAY2577365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033bc8998d0e8f9821a0a3a2a60599875b9e657c1ed44b664e5b877987894a76. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/QZQAY2512837.
One Scene Unity: A Hardcore Compilation, Vol. 3
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180d9a771b1199d77d2d42c29679a34abc934d53b019c416430a93c7351d13c2. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBMJG2303766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81c01b41bcd8f64560a156123eb0bcb42d4ee4f97e846173cb805f7ed366a828. 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/QZTAW2434638.