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 0xd1a993c0ba41632d1a7b8537fee1ac922b220136b5b4e9f780a91306920671e8. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/782828c1-22ae-43db-ab6a-67215bde7ea4.json and https://artists.proofprofile.net/proofs/artist/782828c1-22ae-43db-ab6a-67215bde7ea4.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 0x2ba25aa69e32616655afd571813b0528451da91e6843c14cce9e1ed58fed849f. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZHNB2342873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a943dd16b48f081ae4b472320474d360ddca47a50da5ec84cf4b50348daf536. 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/QZWFN2335323.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b35dcce1b1ff2c6534295ca9c5d16b7356a803add999d75f11611f68d05e806. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/PLF242211479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca8dfac3863480e8fe8492d4c458942b74c62a3d60372f6fd03470f03ea084d. 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/PLF242209909.
Bez kitu (feat. Paluch, Bilon, Lukasyno, Fidżi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec983f7b1b60f9b665dd50186f62108443d5bfe7f7c4b408faab9c1a22977abb. 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/PLF241906116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa10408fc469b9d410674a759e22fac61e34663692a5b91e3adab2dbded403e39. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/PLF241705090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd13667b06189a9e12102bfbd028e88808e7e15bd944dc77c1ebe6058314740db. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/PLF241906124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d54095af418ec470aadb04993ad6091ae73884f450accc818340112a5f389f0. 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/PLF242412214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6373d138ff1b1edf890d9069e1673a1e06cac4a08d34a426902710d8ce182a3. 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/PLF242412216.
Banita Team (feat. Egon, Kaczy, Parol, Chińczyk, Profus, Wuzet, Murzyn, Żabol, Fidzi, Solak)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c5889170ec3126b9038d490bb09f3da9202e42e9d0f99346728ae2f7f60466e. 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/PLF241704197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01dd16c3f629a8088b9d70d2347877dd9659821ffe09f41e37c7f483183e00. 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/PLF241704199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17230557a7ecda40b5a6e79c7da5bb090df8cef67acdf75e27f19ed9bd786d90. 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/PLF241704202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ca8dfac3863480e8fe8492d4c458942b74c62a3d60372f6fd03470f03ea084d. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/PLF242209909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9778b845a6c24995c379323592e3eb5aaeb159132583eb3602fc67bfed43d48f. 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/PLF242413613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0bede7cd01527ad57b0886a265c4abfaa00512b60c506fceb0b714fe7bccf08. 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/PLF242211477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008823c584b0fb4c1efb30fa63dd40bb77f1d64346c338e80cf4ea32b90c517d. 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/PLF242209940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8e88be412d962289ae2e717b45df3d317aedc9f31eea02de52b7eb1643a87a. 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/PLF242412257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7929a2de71e8da1387a880958f6b015d5829e32af899f028a9175aba33d922d. 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/PLC062413590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b13636026e094122893effb440cd488121ef8859b8c0f0e249e53f6a1b0c1bb. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/PLF241704582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ccfa4f0aba01f373086d5636c9052325912658c893d054d8a05a5469a53aa8. 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/PLF241704593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b1f7002c0219701842d3f00312bc5686cc4da12092545125655be6eac88e2f8. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/PLF242211139.