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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc8f8fb7bd8d2850f86aa6f20d0ed05528cc2d6efda43c223be62009519489de. 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/d3ceb115-6190-4900-bea0-718acd602fbd.json and https://artists.proofprofile.net/proofs/artist/d3ceb115-6190-4900-bea0-718acd602fbd.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e94d782560f1ef8a6e03a13170615c6fbf9fec7a74ecdd763c6db3914cbdc7b. 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/QM6N22326859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x489d4ddb1d445e8b97c23b0355165771633eec32d8b9156956cca51f60280ca5. 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/QMFMF2202825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7ac36ece9fdbd6319b1678f73560d46bf7451c36fd8c4a178ab8354851bb74. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBKQU2431756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ad3b729f90e553154e9a4069669eca934ac2d3c9fbcc50c3c216983c59afdb7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2431755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb20b3db6884f64c2881406506e0354888f1afea85013461a8dd1118e55d9a096. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GBKQU2431761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869c1c43aa72ed93c2a8345437484358b891522b7745dfac78aa50607cc72a46. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/GBLV62318042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822f871ab27ad3ad73727a643312d4049cf5f0eb41ec95984402ef4f3c348cc5. 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/QMFMF2309802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa96ffe8deae4a647fb701bb766390615a38cc117ec8ac4e1436cdd670c8ece2f. 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/GBKQU2358562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8818d8d3fd44d3e1c1bc60abb38bf2e2ea1631014d788c85b4396742eab38535. 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/GBKQU2356110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42c672823b6c37a1c3a23a2fc5e8719a50dae95cbab4d26e267e91c11df17cb2. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/GBKQU2356109.
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 0xf455eb37ad4335d89fbf33da95d924bba9453cca610856954f2aca72ad4f1de8. 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/GBKQU2344717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf98c72e0793d81e7c6a9cae73d8350e04c03e4eeb438ec874db5bbd205db69c6. 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/DEXO32235399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb421304ef65ea147e6d43eb3e931c2a8a11bef3d73442b30829e7a979ae5d6f6. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-22T00:51:58Z), 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/DKD3Z2109487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2c14e59aed062e640df2dc4645bc824ae6b07442c934607d65bd8e33dc4697. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2200601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f18769001926508436e789bf3e101105040cc06d997d748824a1bfb94207011. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NLT2H2200435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcffbc7eaebb6b53268875761d67adcea1a3eeb0ade43010441d70477057ae794. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/DES232200110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c692360c2ea8fcb21c89831501a16e340b15eb295cb4ea0228fbd7e591e33f. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DEXN82294738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a9c43ede31519008817eb4f5defe992c96c910b85d2491960bef934aa6fdc0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBKQU2197247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e4c015f2424c11a6fbcea4c12c237bf38524314d6ab47b703e945bab4dffad1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NL1ZN2001253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5067a32f7e0f3049659a90859754a77aa333e4760279d3f87110682c0a8c68d2. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLYK92100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdb2dfc006c8d3fc908b7699706126ffaf2f84833c0ba2692d5fa7b23241c36f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QMBZ92262426.