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 0x3935584dd99487ef3a167a6a2f29ff87915e0e45828c5497bb34254333e5b810. 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/a296cbbd-0b75-4566-9c95-d0fd7bcd6ab6.json and https://artists.proofprofile.net/proofs/artist/a296cbbd-0b75-4566-9c95-d0fd7bcd6ab6.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 0xdb2928e06e3b886032c24bba8c945c42cbc66907458b7fa4d2838a699b9697e7. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/TCABY1438275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa119f8bf32fb92ac07a20f1bd8a2ee3cf8d8f01607d68b1d62d17c5ddd23930a. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/TCABY1438278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5bc47eab9395377ec12ce491f106bbc008a63a761c30eb4e969756e27249b41. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCABY1438282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x913f3daf02790504d8c82d129593ea75b2ca7130439a7a407bde955fc2d97f29. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/TCABY1438284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee4df0c431ed57f9deef44289c7df0377539e98d30b9e484bc97fad6e87be8f4. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCABY1438290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23cbf8b59782d89d9630061d2bfb96b944c6d9f27a0db8d0a84163f9783f170. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/TCABY1438292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8551fede2a34fb243e834273d1b6cc8b226721da34b4a46c8c11527c5f233d23. 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/TCABY1438295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3827a264ef299be60709f080ff489d363fa5e729e1ddb9454ea9dd345530b5e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCABY1438297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x810701169e1eae837af4da1e4d5d2872434802a2fb83bf41b70e793e63205f06. 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/TCABY1438299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4673dcd3772c9f4c3be84888dc251270d6c6a521dc2d12968b4fd79a54c6f8. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCABY1438300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87e7e9c490e641bb53cab7d86e5573b9e3450e6b63093d70237888857b5a9017. 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/TCABY1438304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba259759e4ae36a257c3e38c783c8d36252d0fa7fd96fdfb096ffa04eda1f25a. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABY1438305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa216853d8d5cf8dcccd1a18f5ed8adeb088bec347d6963cb73e1b5f5ec637046. 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/TCABY1438306.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94645a9719008022df210ae5c1a8bccc8b7951a64be5c17ca984edaa024117d3. 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/TCABY1438314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a6583a28b0762ab920a20fefef93e74c82206aee1f70799ada19a20263a266. 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/TCABY1438321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf45871a0c89dac631c0b4dcadb8c58a83603404f20a60ed56d1e8ed57a71c475. Chain 2 (Bitcoin): anchored in block 958695 (2026-07-19T07:37:00Z), 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/TCABY1438325.