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 0x99ca6d38e747e301eeb82f318c63c432ec18405cea1e47441d7196ec2a5e6bb2. 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/7e8bbfed-36d2-441e-ab20-4fec2d805595.json and https://artists.proofprofile.net/proofs/artist/7e8bbfed-36d2-441e-ab20-4fec2d805595.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 0x25992b77fa631769f609c26cb4a9fb48eb885baaff05b3eea311c87a054c7863. Chain 2 (Bitcoin): anchored in block 958666 (2026-07-19T05:00:30Z), 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/QMEU31813652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2556dff1afb459f8aa206d178db6ba154ff11664c8b6dc446b9cd6acb2cb8887. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QMEU31911185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc24db60316323d362573588e23dd63e8ca409896c00a39e5476318860b19882. 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/QZES72011202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7486d87e2cf5e582cd904a7ee2c84b274e5fcc6fc442cbb8f3af6827900423. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZK6F2042249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e25b510599e7a48e1a4b43190d0c00d5445b8b82b91de1b8b74645e2a730fb. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZNWR2086439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05520797f3d5263ae69152e919238a708326075435296e2fe8c581e44301c503. 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/QZES92131879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05520797f3d5263ae69152e919238a708326075435296e2fe8c581e44301c503. 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/QZES92131879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a03d4d2f12acfd481b195c36a3dea1df2f718a07e22b90144b9c6a46634f28. 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/QZNWX2138926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a5909e97e62ecc9268877d7803c0d4f2535e5d735533096cb3515f927c185b. 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/QZES92266138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9048814f1cef6585740a577d7f91aa95da9a6ce4b423a6d396feeb8571cbcfd. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/QZMEN2338343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa561ee3dff7e9bbc657cb0372c0339e57ce6a8c5962e994d777eb1369b99de5e. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/QZMEN2338344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83e735429e3b046d3ac2c8cb6555f34c9dfa64f2121c753793265902ce530c29. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/QZMEN2338345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdde69a5dff4ebee79e5239df20e83008886434691c45b98ec1b055617734446f. 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/QZMEN2338346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd67fb68c5582e33f281d9f160b056cac582dc9917acfa4407c1fefcb9e2af29. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZTAU2383143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6abc5a91e6f0d56ddd798017ff62564fdbf5aa79208d7918390b1b2e33183e9. 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/QZHN82454943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a640b931953c2187beb4bf184f1359b3e6ebe9190a260586d3aff316af9c2a5. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/QZPLS2421002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31afd9ba5cfcf18c4c621bb1fcf0cc54cafc5efbe1a2db694c263aac489f11f6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZES92507359.
Indie / Rock / Alt Compilation: August 2023
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd69aff484477401781b343a6bb3a58c6406f0d2a43ce8d622aab7692e773b4a9. 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/QZHNA2379814.