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 0x81b490d2445ad5870de2b3ac6250fda3d308c89b0c106f53f8a2f791ff95bcfa. 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/8c2b0c77-8791-4b03-9aae-fed3787e6ecb.json and https://artists.proofprofile.net/proofs/artist/8c2b0c77-8791-4b03-9aae-fed3787e6ecb.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 0xfaf8686daef662185a6e4d474de4978e8982f394368500c18c2ec9dc0727f3c4. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T19:36:19Z), 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/NLMT41400691.
Round & Round (feat. Lil' Kleine & Bollebof)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52040a56c164a905a853c5f94ec5d95e35fba88551cea2313debcaeda5f3bd29. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NLP6D1600002.
Pussycat (feat. Boyd Janson & Patrick Paul)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43ed4cbcf8f31bc6892d84f5d675aa8d4ac8a3e32a24c8f4a417a8bbad0657fd. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/NLP6D1600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75ed1fde9f6921d734d764b4c2511d525235b14b7abf464337eebe264b642c2. 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/NLZ541800641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6ee73d6406956848b4c4e0abecc2074a4b08d3fe261d21e3774cb14176a39a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLG662000087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32d38e64eabf37e28ccc9badb8a474c3b596e55deca05e9fd65e19c9d4b0725. 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/NLG662000361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc997a890510cdf49703f03ad66c34a44e6406a63874a49bca513ce1dc24d86f1. 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/NLG662000859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6d25c69a3078a2f8b6e55011c44bba8736560a12015c9e80eb8dcfb2c95017. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/QMBZ92496478.
Run too far (Twentyfive Soundsystem Remix)
I wanna be with you (Twentyfive Soundsystem & Roman S. REMIX)
I Wanna Be With You - (Twentyfive Soundsystem & Roman S. REMIX)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf87670c27f1d3015024e40055d09ec115dc0659868fe94160109711172478a3e. 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/QMDA62536203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb14407fd211a5b0dc5f12f94503ac19d442fad9e0a8843154e15afff4737a1cb. 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/NLY9D2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x798225b3622cc09c540ba41987968088b0acd35542e798ded23336b65c15cdd0. 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/NLG661800207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22fdb807d7bea9922d9880d6e47b1c7c157bfed4d775188bdb00d81f6e1007f5. 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/NLG661800338.
Sunnery James & Ryan Marciano Present Shameless
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f81a0989bd394cebf443faccf1d3913edefb4d54f14848cb1d6603fbbb5cde3. 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/NLF711804847.