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 0x638798fad45eebe8f399c67fb278d7e5cc96b264d30699c8e4716f23fe6c9594. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/117e9388-2457-451c-b2c0-83df57d4ecb7.json and https://artists.proofprofile.net/proofs/artist/117e9388-2457-451c-b2c0-83df57d4ecb7.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 0x68cff5fe3df2ca1b96cf0e655d9bd7031600cec661f3e87da53b802d10caa210. 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/QZES91837164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52c69006dc52c2f9c315d2f2f25f3be52c5d0d4211c5c463ec57505f591be1cb. 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/QZES91837166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb11285bc0400944f41d6109d4d4927bf3b78b2e783f8c0fa1bff5ada85c8952. 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/QZES91837167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbca0360663301bc7d7c18e20fa26abd5bd53e1ab7830512fb9f07ccf8bf3ef02. 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/QZES91837163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7fb74cabe788c307d241a5189b22cf49d4776a1182e52808a2d4e9ef23fdd39. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZES91837169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8de1fe92232f9c56c51795486f4b6d99276dbd99f2c5b4860496948d46dee20e. 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/QZES91837170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe97e370c2f61719d9cf5426fe3a393f7e7c47feead3dbbba9413595a837f5149. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES91837165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5387314aed42ab45fbf821698ed5e80b32d1775624541812e4796201e35e483c. 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/QZES91837172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaff510cabd681e8f5531ab2b5654dba813c67c781c34d7f95ae357261dae3bdf. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZES91837173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe10a005ae71d05306c65a999c261bbcaa9ead372d32ec3ccb2dc911100064f42. 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/QZES91837168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc970105753de17c9d6386b3c338a30497807dcaa58913f15f315c758f6b1da2c. 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/DEN961631501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78564a75b956a92195ba6b78e07740e8943934ac9aed195733e055ee3ebdcce. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEN961631502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2916da051cea8afa71d23bf2a9d63dac3172b3e702a75594efa9a3c356ad0037. 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/DEN961631503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c25f41eecf789fd5fa53a7ed1809bc6c6a9fe60d381b98005c715ff2dc84d2. 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/DEN961631504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad317a425785f6abf67e9aa0cf9e73f477a5ebe536e2fba0015c8123d168899. 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/DEN961631507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7a51ed8033756c6f9ab31d42125854545f715132f1571e2b4ff9ed4e0fb117. 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/DEN961631508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152863874a5e52ed87c5109140f43522398be188a3ce2b6b24dc73b40293c8f4. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/QZES91837171.
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