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 0xe3952d7a3ffe2e62836ddeb3e1e018fe5f5e6a8c8aa48145e5737b6ca8fc8ad2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4be3b598-c80d-48b6-9606-6ef6705ad64e.json and https://artists.proofprofile.net/proofs/artist/4be3b598-c80d-48b6-9606-6ef6705ad64e.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 0x7146281f52cac3ea68ecaa9614d8b7b5136ebfacbff893c18ae3b71f22bb83c1. 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/BCBBK2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47dde7b445b41d70efe91d088bef7074f9db7e96b52b37c674f45e3746209023. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKTTG2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38d129571fe1a992a905efd85b54adbe7e801858f4ce87cba1e0248954d732c5. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BKTTG2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411d58fbd9b9e8365fece428a6229969c6659bea0d399b230953826571a22e56. 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/QZ5FN2214548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f9981d84bd6a28bc6dc2b2e0dc7064ed4c6f727289ac46cb8a2e0fa834854b. 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/BCR6R2100123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64952857c62cbe8e6e8e610bb34a46f119e5f5e94d1f1b6878a002c7fab53ec8. 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/BCR6R2100120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x047a9ee1bed0c4f78fc7057219b282d8b355fc1223eb8d0d219f1806046cd460. 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/BCR6R2100119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0668e422f81b2c50cd5853f56c1b5860efdd004696f254572ed9076ed097bc5d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/BCR6R2100087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23181b1da0eed353bb109253471d988c70abce73980b3928731141eee1804859. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCR6R2100058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2477dd3b78200bcc50641c0a668381225b1f78db85abc86f660cd9f2d1280125. 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/BCR6R2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7ea423b51820392003214bddf7593477051c0070cdddc56c1f37308130773dc. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/BCONO2000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344d5cbb7a49f125b856a64c99fbe3437b5d922c4f2a925b832087f2e717576a. 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/BCR6R2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c95bf380c730d78b4ccd3c665e96f831747065db31bd0a9f6d0622cdf012e69. 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/BCR6R2100026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8da8d0e95692422468b69bb1874f1a9c49d3b4777f85b2f986b109a220e3a26d. 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/BCR6R2100023.
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 0x3212668ff58f59bbaeb0c5d410f36f9b31de1f58f79ed1f2e18ef4b91267bee9. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BCR6R2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x819d57d75fa73abe2b654b3e9ac132b47b0dc37db2d61cd401cd01b018fcf97c. 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/BX56Z2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb0045acb9a4d3e7f32f5c0123205b866df2e4d10b7ceb8ca89115f3aedf506. 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/BX56Z2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6db9fda7ec6b814d8465c7512238352b0db52750cfd78a8fed4522782d86658. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZHZ51956357.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b97293ded09e8c45fb9bbf47a93675bc5ec0e889d530c70f412f118757d38a6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BX56Z1900001.