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 0x74d16169ac3e55ed5b69ac3d528ef86cbcbdae2e65f6010e8e1ca5302b41cf9e. 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/1e765221-0ae6-4568-a34c-37e76f9faf06.json and https://artists.proofprofile.net/proofs/artist/1e765221-0ae6-4568-a34c-37e76f9faf06.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 0xa24c422f0dfb6854c1d827aaf446d40a4a8be770470fd45a35e0063cc0d808d2. 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/QM6MZ2037470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcddffeab486684bb5615096b6cf682cc45f3128dc8233dc6342ba2fa4b7be753. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QM6MZ2037471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80e6dc78b5669aea4c49e108046a62eed2fa217dfa7d270e93cc38579aa756d0. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6MZ2037755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd925e0443c595411343ca8cfd5ec096e3a405fef9dc99f66594ea33e41943394. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6MZ2037677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2604912e28f41d818859e93c697e2802ac36c09efa37cb268c20eed06603617. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QM6MZ2037655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a73d919badb4fe1ee4248f364801d1f422d4c482aac571ce4d8376f0f6ad09. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QM6MZ2037667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0020056aa1335e2a7668153749fb98e2e2c8c48e6a89223651f30aa6427f3d. 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/QM6MZ2037761.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4494a27bc8f914f371cc01643b1668f565171d738672e9eb37254a7438511798. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/QM6MZ2099873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbab8179a0a2ddfa4b2bfad3f558029ac0638119aa56754c09971e00ebf64436. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QM6P42038421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4abe0cbc22ed332a7feebc3c7ec1dce9210ca590ff8f4d880cc4cbc69ffd2a38. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GRSTY2000275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4925c54d63f5ec9abba7d7e499d6cae5b01d795163968c1db3cdf6e79927f877. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/GRSTY2100126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7894126e37101e53ed93cda9b455c0bba7e60f7092e601db085fae259e244d62. 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/GRSTY2100800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe1789923d42e11d72fd1b71fe75b5215d2dbcf4fc4834319cc5dbc7702e65a. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GRSTY2101064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f633b420916148f60bc63cdda48e4fdae7ae5d8605ece54b003cda2e5d6f5af. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/GRSTY2102116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0b8b97b4e36927ad1b09f01ce52a2d693ec7fb5c0fafa8c471f03690e4a3617. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/GRSTY2102117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9b9ca4845db8f796feb778fd1678c5a06a42786f81cdd8c349cb7e1eb3290e. 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/GRSTY2102121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aeb47b2a22ca2b6e998e8b149f9c851602c91ea65508ff8ea47329e850ef4d0. 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/GRSTY2102123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2693bca0b3bb039e6ee1125fc483e53372b06757c8debcc03ffeab78cec29495. 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/GRSTY2300412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c78e431f65e8349f3efe10cf6289216aaf5d54c6819ddaae862486121431550. 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/GRSTY2300658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5da6af5c2dd6aa175c850f7bc1e070aa0c60e7484751c902c3a6ebb5a6cf83d. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GRSTY2301429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86eeca54d335e50ce5e5e8474f3bbc32dc90eda70ac3a0c0c362972eda0d19dd. 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/GRSTY2302381.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fdc9da707279412f41e77102ed668d668424ba607ab2436bde39123f879aaa. 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/GRSTY2400737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4501489206e2f2deaa493c76ee169f8d3825c17dd26393cfa7e9e3c28f5b5417. Chain 2 (Bitcoin): anchored in block 957833 (2026-07-13T09:36:32Z), 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/GRSTY2402406.