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 0xe91129507c861c1ae3bda9671f1fd07f7edee48cd0ad7e569875cf16c1c8afe6. 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/5096010d-fc5f-4512-a2ac-bc5a2af2c1eb.json and https://artists.proofprofile.net/proofs/artist/5096010d-fc5f-4512-a2ac-bc5a2af2c1eb.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 0x45dc37aba0914f943b14d9b83604945e70660b0987c8d5548dc5a7b43e334b87. 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/BKDFK2400127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb712e5a38e0da1ac6fee42970e8eddc0a95f0727ad77dfa94d1a66132554a9f2. 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/BXKG22302781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2444be72eefcca8c8269a2f5e0d1a98065171b75d4baeb216057fb0a34e9de2. 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/BXKG22301540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1c40e0e5ca306f6ffc6ed60119c2f9c0852c977074f341c467e85e4b3062cdf. 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/BXKG22301277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fce46003e20e2682549cda3265efd78dc32c4968daf5982ba4d17882ee2cb59. 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/BXKG22300757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52e56cd6b0e9c875866fe9c6acfde9827a4ccc512e9c74a79594db00b0f40627. 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/BXKG22300675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11c9d510138c6cffe4bc40a98ec7da6363b9310eadebcc2a896a316e95ed958f. 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/US7VG2360302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ed915b3767ea2b6de526e77439f476ae7a7c2da4d67a0f72db4e6aeeb18bbe9. 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/BCZY52200171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5e76b2ca87217abed50b81026c11086193ada96771792e0a417fa3ca22d1615. 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/BXKG22201436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde355b0ab7115e447497e18eba46f8476b00152756b9b58b336d985d37100012. 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/QZW9N2224262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbca033a46c3903ff4c9acdd0f7a5e847535db6a7010a3093410472e1844e7a7. 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/BCZY52200113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7191985952752935786c7dc9497a69e47efcc88a85662d4a9f54f6b76b1af536. 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/BCZY52200066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc3d0d798ba692f986c6258278543562b3cb57b3d25faa47c14fae1c1c28aacd. 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/BCZY52100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x977ddf0c7bbc00da402606882f2f021715b5c6e0a94c05337c72345f5d82c082. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCZY52100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe907f36be07255732a6c42166453edbfa44ad06a41006e52e3bcfa12cfd8791e. 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/QZNJY2110812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x921df3ce4351fbd5da91f79122e8b535aa9fb603cc787f10bff6310d66a27b0c. 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/QZHZ62177413.