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 0xc3414dbe74a1dfa4676d35abfa301528903ac266161067ddfed20309189b13d5. 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/e32526fd-aed4-4675-85d0-7d5231b7463f.json and https://artists.proofprofile.net/proofs/artist/e32526fd-aed4-4675-85d0-7d5231b7463f.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 0x7a7265e46104964f96a9ffd658667a96651ca832f0eb09618f11c4aaa967f785. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BR84B2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e60e48ab80aa73e585ad1e27277fca2ffe56105093fcdd08dc49d13727e4ada. 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/BR84B2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df006015fe1fc4ccb6ce4893a9320795b546a2f755257671e03a22c78129e5. 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/BR84B2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95f49ea920923b54ffdd0cb7a13e875018ab98eec618efcafa28f72061e3cf34. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/BR84B2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b60f41de629450f89907447e7f0e9ee4b3332e5fef3b39f4cb085542c939c4. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/BKAP32200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf88080ba08e6808cea9820303a0421b7933c2fff703ed352e146666bc762c6b6. Chain 2 (Bitcoin): anchored in block 958407 (2026-07-17T12:08:48Z), 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/BKAP32300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93ba44d4d73a8b4c75b7eef6a5eae8492e257a9bd9b6d5b49f7ae85551c23b43. 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/BKAP32400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a875fad6f6f5cec4869cd872b154e7fb0e0d7ae45e318043934ed333b9642e. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/BKAP32400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a875fad6f6f5cec4869cd872b154e7fb0e0d7ae45e318043934ed333b9642e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/BKAP32400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa8deef60127e3176ab49c5c999631f2e2ad5e47709ab2e1083969782758246. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T16:15:11Z), 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/BKAP32400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x506a1e6de2d5e11281ba99f0f995e29d9e67c33467949c5474e6be5452cf82b6. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/BKAP32400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a0dbb77edf6b6e869494d8b4924c15bf4e1179e3d38798c5821e984f4e1ee14. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BKAP32400022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04c88af26faede479a8e3684506f4509e13b01be7ec0361b5ada2b9d10d598c0. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK9XF2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6650e2629235430e26c70d079f847d4240db5c831907056e5b06d96f9ac90bb. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK9XF2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d2fb79716f2409925bb4b42a389ee9c1ead598197616e2173dd43bdb936c3c. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK9XF2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12909123e0f3f9ac1426b53d86b330addf84baa4be3927c2da97ad6df3e4c490. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/BK9XF2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8a8e23a03f1289b5706c47f96076a3c603f27d8da3545e17f4c051bdf89da. 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/BX12K2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41a44a82b83e03eaa87f055898283ce5814ef569c1f68931ad30a3c95f9dddf. 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/BKAP32200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6996c4ad1508466206548d0f45e80268da85389703b7b20d1079009387e2cf43. 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/ILTON2406174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85f8a8e23a03f1289b5706c47f96076a3c603f27d8da3545e17f4c051bdf89da. 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/BX12K2200027.