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 0x43f1ccaff911baf640cad411f8518fbb1c18a8bbc1524f085239dd470346bf29. 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/e80d608a-766e-49d9-a2ca-8eb22c5dca19.json and https://artists.proofprofile.net/proofs/artist/e80d608a-766e-49d9-a2ca-8eb22c5dca19.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 0xb7a8ad82597d4bfd9e8dadd03ad6fab4681c09d264024efa48a00e827af7009f. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN42108686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x796fafdf7bb58ae6446ca3b45debe610d5565ecf872a7942dab250c4dc0fddc6. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZHN72184685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69988957da64c5f4088327f40845c36b23504ca5937c133b8d2a28a645b3fff7. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZK6N2110464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e445dae5a16f8dbd266c3fe406c5bc3cb0b1297f9edba8cbb4caf5ae8b3bf4. 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/QZTAZ2295803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced6b60c46ec45ccae1bf5b8e549f3e07f44f5ce8b1ae4fefd30de1642f14f61. 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/QZTB22375196.
Nie będziesz sie tak czuć (DawidDJ Remix)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4cf433fd29dae16a73993f71d772d1b7755f351803f4e3c0a50167e2a857dea. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZWFJ2317882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67060e7363a8db415daf5834e7bc63a0349a0e361c248271f07e75e5ca00f692. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZTAY2442819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25f716cb7cfd9a51e02e8ba8cfefcfaffec7c1da769ec97ea1695fa6fde36688. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/QZTB92461821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67be56d4ed16380d49a5e36e80ea09e58a9c647323c9c0b4d6fb6b59c53edaf2. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), 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/QZDA82546382.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x318a0fef399cd257d734ccd5b8d994b75d8bbff4a56900084deb28ad57e7d1f7. 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/QZTB32559620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2078abfb6b5b27d551930c4fbad0210fd7ad950ee1e3b683686ec47c020db819. 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/QZNWV2558378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983efc1f864653dd17449d3306fcf55735be71c9ac5b145324dc7b62f460bf3d. 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/QZTB82597038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84b36d0a45500e8746e5b38e3addcbd86b72d8079359472865389a37b537575c. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T04:29:18Z), 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/QT3FA2534035.