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 0x91bf382303d31c97c5812ade4c5a91aba1bd6c80daa34761e15b89d784e91186. 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/0eac151b-92ac-4c11-8790-d3ac3a0a298a.json and https://artists.proofprofile.net/proofs/artist/0eac151b-92ac-4c11-8790-d3ac3a0a298a.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 0xa093aafa6dc012fc8e00c665c4ac0519be9c18faa142197992c9cf1bd3374635. 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/USUM72021747.
Might As Well Have Coal (with Baby Tate)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107db31faa1f113ecff93721d7400b2b412493f3e75784732244b968ccefec23. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUM72222046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d3d3ac9c7863016c3210ee37312ef646897be0d2479b878d28cad56c95cbffa. 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/USUM72222050.
Ghetto Christmas (with 6LACK & Summer Walker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aeda9cd4b6891b893390253d6655f472180180853d18bc104000ba6cfefaeca. 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/USUM72021751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x017b51575ac202ab16a08a912df8b4fb65cc5c8c1693877ea24419e60083485c. 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/USUM72222784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1b779620ec1b40013bd71e33074a3f68de363fdd8573a7ed7e704366fecb8e. 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/USUM72222049.
12 Days Of Bhristmas (with OMB Bloodbath & WESTSIDE BOOGIE)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c0203656fc82a0194d203c539caad002720eed34fbf006da0bb81e097b7007. 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/USUM72021742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f8341291a35fe5cb9581dbbddc6a835cea2f594d16c30686bdbbfc4c1c48a0. 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/USUM72021744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18ada1538c0f1aae735c542067c4269ac3e6e5fe6c0cfe32442ef12bfb6087f. 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/USUM72021752.
The Christmas Song (Chestnuts Roasting On An Open Fire) (with DRAM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ac60b195e8c5d8238f1d57121e06ae08a9a65fc50a05852827e19d7240957. 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/USUM72021741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26272c61c4cd25f146f59d2e36a5fb9e1a74da34dd061946d425da780bbcc7ef. 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/USUM72022009.
Feliz Navidad (with Young Rog & Shelley FKA DRAM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc18ada1538c0f1aae735c542067c4269ac3e6e5fe6c0cfe32442ef12bfb6087f. 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/USUM72021752.
The Christmas Song (Chestnuts Roasting On An Open Fire) (with Shelley FKA DRAM)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca2ac60b195e8c5d8238f1d57121e06ae08a9a65fc50a05852827e19d7240957. 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/USUM72021741.