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 0xf43b870b3dd32d844b7c20bb6f8febc37344f0cab46d1bdd6c14dc69584181c8. 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/56bb3f4a-3cba-47ed-80ac-dcd1ef4918e5.json and https://artists.proofprofile.net/proofs/artist/56bb3f4a-3cba-47ed-80ac-dcd1ef4918e5.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 0xcb18fa1db40176d8d0c56286853713c39bd11284514096c1082ecdcde807061b. 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/QZFYY2000386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d97ec1ee0e8556fde324e5e8909f3658a78f19e02fa9f52454370015e4376f. Chain 2 (Bitcoin): anchored in block 958491 (2026-07-18T04:29:42Z), 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/QZFYY2000388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5f5fb42da0b90c83724d50117685438020e09db0c71ff2900bfd5dc47c5fc3b. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:55:08Z), 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/QZFYY2000389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13c0ddb30f224f705a1fdaf86dd44858622994e280f1bb5911adc79d1cd51ce3. 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/QZFYY2000390.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbfd31516d5b75123379bf0edbe44a96b4dd188de80bd337c50409bad3f66b36. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:04:01Z), 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/QZFYY2000391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x528f61db4710d8c48e0a0570d4406b58fcfcc25731f43c56417f5f308578a098. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T21:41:29Z), 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/QZFYY2000392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc85733fdf3ac5219b6da4abcd0956d512e6fe3b8430df5fb6fe9c694de2d1f89. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZMEM2014784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d594a965925f14b18b1d15f82b681d8ed02db516fefaedd0e239cbed19cdf77. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T03:08:07Z), 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/QZES52152160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x774a56dca60ca81968cfe6fc118ae155314b434cdba0d0633c27b6dbfdc0d0b8. 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/QZHNB2211504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca800fc251e97f5c75901d1d1040bafeab5a6934caec0c0497264328cbd18391. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZWFG2379052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506f0fc047eaebb02e40ae3ed668e5d396482459ef4b9b2475e0aa4bd4082f22. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZWFJ2487181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919493aac362c2105164dd191a34aa1e34e887d9f2f5158173b23aa281b8f5b6. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/QZFZ42511763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273f5dcd14d230f074d932c59cbb8a6af3192a12f269f5b2831fa900969d337. 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/QZDA62233123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe346db8ab2a6b09d24aa72f48e4fe36a26e0125276f8020c6ac43ce1f8cdbb5d. 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/QZDA62236276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa273f5dcd14d230f074d932c59cbb8a6af3192a12f269f5b2831fa900969d337. 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/QZDA62233123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efdc361586fa349b5fcfacecee1f6c26b11283dc33c327846c0b4949dcfc841. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/QZDA62236278.
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 0x90abfe96ece2916ef061f20a75af802b08fe4936f27691575eca394f23bde69b. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/QZDA52276318.