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 0x7dbb482dff7acb170b63c511f90bfa45e9cdc01ff445150e2a500f234e73ae2d. 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/74ebbfe7-87d1-4c81-8754-590ffaff13c5.json and https://artists.proofprofile.net/proofs/artist/74ebbfe7-87d1-4c81-8754-590ffaff13c5.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 0x0684e2b79119172edba9a62e69e980a16a769d7758248072a2fb6fcf3a7fca1f. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZFZ61940763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd1638a94d52071ad6bd1ba6ddb32d3b69bbdc6ea6a7c10738e720ea0ba9ab. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZES52138650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2ae30dc494ca5191696ee3473d0a170cfb8499450c1456aa6fad9633037afb0. 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/QZHN41981781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8eead620f97d09df71c31b593faf6ba625b2eb2d3330d0f453a3b244dc494b79. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2116071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd359e2c68150dc7a0b829962b951e7b58c74ca4dce55c18c4dc49f277ccce5cf. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTB32491043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0684e2b79119172edba9a62e69e980a16a769d7758248072a2fb6fcf3a7fca1f. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFZ61940763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11a16b51e4cc3f64f3fafea48641c241bcda7b5b81322512fb6cc38307aa208b. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/QZTB32417523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7cd1638a94d52071ad6bd1ba6ddb32d3b69bbdc6ea6a7c10738e720ea0ba9ab. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZES52138650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6ad09f9e3d3d2511692140a7c5ae70cc8877f97459d5d2eb81fb5cb52f8a3c. 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/QZTB52401286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a0dd416e49a70d8940a9edf850e394e95c4751785441cbbadc56bc6492f56f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB42446712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320741ed8ac29738cde2194863c0238aa8fc28299a9359d2000e97fb0e1f5969. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFS2489618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03159f562e3883dc0f65373111f3f4fe3c53da32574395f6779e1d48fe37ec8b. 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/QZTB72433984.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04dbb34b502448e00f1384185f8ee515bc258651cd78c306e3d9265132d772da. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/QZTBE2433109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5408bd96d2913258718160ebe18c9f084b4c8b3dd8388faa0be795538d63e117. 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/QZTB42447277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x946bdda82c43264d9fd98a4ca0c89de96470c7b7919b2b5d54b5ca41aa4fd842. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZK6N2317518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c8bd7fd9659e538897e4d4eb91fd2cb2ddb46d05f51cb58221380792c49b867. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB42442658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d19c3f72cd1dcd60654eacde63a921b80659a1a624020e4e30596419ffc36f1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZTB62444418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12af766e57600bd90b475eb83a9c738cf2815a8d6d484be59c7963a11846b72e. 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/QZTB62445736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bce214baf20644c3a30da92439332f8d8fd8657e95fe82c063fc8cffffb61b1. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZHN72531698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bce214baf20644c3a30da92439332f8d8fd8657e95fe82c063fc8cffffb61b1. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/QZHN72531698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x144dab3fd03a510beab0e7cbdeaa8e155e7b8fb7aef6abdda8d4ca6e5223bba7. 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/QZMEM2517642.