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 0xf83ee8f5f988eedc501f70163e3ebf24902f6b46efe30bb025b1beacae3cecf3. 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/8294b366-da40-4ea3-8334-6de7bb197adb.json and https://artists.proofprofile.net/proofs/artist/8294b366-da40-4ea3-8334-6de7bb197adb.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 0x3fb094590b2cb378edb148ed745cd91bc3510a47cc0a6c12e2e42bac09b58047. 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/DEVY81700568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5451aa80d26fd57af1f9816c99708ae34c1fc2e7e5f118e2e4f6add582e14170. 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/DEVY81700569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1f3fd1e4a1aea7df47d509187907bf08a07ec7f5d2030022cb65bf3db876a4. 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/DEVY81700570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17cd5c238f3e8c64831228e2b56b3ba381009354e74892b04d858725352c6582. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEVY81700571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe61edaf22f5d639e2d1ef298d552273f88c81152208f03750f01eead0368d3c5. 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/DEVY81700572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76f882f950818d89401e08d94a7cb028380d8884bc724b99e1cb5979a851994d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/DEVY81700573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31f022b12b607fb5fd6923a4ae5ea6ed2d7c779c525f5f720b054963c27494a0. 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/DEVY81700574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf41aed61e096cb3672e0589de4921a6095b2dae42f3d59d8e2ec908fef1a77cf. 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/DEVY81700575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fd0bd7d080c87e6d70ad966703338772998a6f8a67766e70cd2d6121bb7d2d0. 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/DEVY81700576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57ef15a3719fbe03a1f117410a7ce23fa1d8a80903a78e4efcd82d9277b3cb2a. 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/DEVY81700577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b7f2d2faeda8000c0f83ccb5bc372fe475394bc86c5042f9e6626bb0eb2c7f. 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/DEVY81700578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x910f8474b1ae670028bd0c96a5b031cfdc965df23eedb4f1a4622a3cbd506c09. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/DEVY81700579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cac0f8cfbbf688efc99e14d69e308030493a922b79b7c8be2de848b0ddab80c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEVY81700580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x094e172002dc399de3440ff61b6455feba2d74ac2a03df3877d2e434ab5929f3. 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/DEVY81700581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12083609b62435fa109697b1070608319175d1d98d440fb1162a7c2719f1c529. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEVY81700582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18cb16c4d38560de6e918ad738e84ed441d7941e59571b050d0393e091fe056. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/DEBL61300235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8795d6353eebdc3c3890cb234a84d3dd7251048b17fcea118969bc437012e2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/DEBL61300236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8ac7e93cb73a3fdcc8dbbb57b2449466650695a622f20f0d52f353eef299e9. 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/CH7811707748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6040d99fbf49cf1f3ba103657e49a58f3901bc8245813b28a73768fd34facb41. 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/FR59R1617307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0892886c68e6dbdc4f2c0241005ea55cd860092a85d4a8c8ebfbd3172471256. 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/DEZ041003266.