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 0x76786f7dce24776d18336af4e44ede345410d22aa6b6625656a252cc2f447eba. 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/c627ce4d-6d4b-40d6-93cc-580e7555f8b3.json and https://artists.proofprofile.net/proofs/artist/c627ce4d-6d4b-40d6-93cc-580e7555f8b3.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 0xf43d57ae1ca29bd7518756b6a1ea72b93e10cd6eda88f86a051dc4bd2923f8e1. 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/QM2PV1747684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8ba78163a4204d777ca742408c9a2613974b4868b93f5efd5a81124055661ef. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:46:26Z), 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/QM2PV1747686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ad56341c324d1ddfa6833781f3a65431ba8ab4d8e457e8be8fb4c55e4a71d93. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T17:52:43Z), 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/QM2PV1787976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x001fbfe3fa710c9dff7788753ad94e9f029eb37674100b4d3aca28b7efe05d08. 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/FR9Z62000099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c341e4bb1b42498207efc697ea39b49a46c108830b8849642de73c16c3c17c4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:02:38Z), 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/QZNWU2056758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd3055d5b1319752069765978a20b951e3e53a9595b5d33041cb44f2d5696d. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZES72188566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d46fb54cc980f3e1ec2099fe99feb6d08e1b35df8b97a70adb44e5e04018f4. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZHN32109698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d46fb54cc980f3e1ec2099fe99feb6d08e1b35df8b97a70adb44e5e04018f4. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:01:41Z), 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/QZHN32109698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18eaacb4004aff529eb987573e31fe8e8700257cd1f53adc47404c2103fe4d77. 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/QZHN62182750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcadd3055d5b1319752069765978a20b951e3e53a9595b5d33041cb44f2d5696d. 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/QZES72188566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b36dee976b3bade85585f09429c823aeab5a4f852d87aa36d6cde663c703934. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZHN62182751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cc4f8c22c837cfa5ea7ba5c5700115d550ce50539808c498213d529dba0a2bd. 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/QZDA52159128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c341e4bb1b42498207efc697ea39b49a46c108830b8849642de73c16c3c17c4. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZNWU2056758.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e65dec3bc5d0bc22870a40e71f37b835616655162e58d84e7479b6395453bd2. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T15:52:32Z), 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/DGA062335901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0952ac81884bc44056d6d9e83e5b2811ac57ee6a6975c066240a1de9b99db9. 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/DGA0M2417814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0952ac81884bc44056d6d9e83e5b2811ac57ee6a6975c066240a1de9b99db9. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:39:41Z), 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/DGA0M2417814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25e6a398851fb05bfa4492092e9c1e92fa4e23e8f9dbf4343bcf37b05fee080e. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T17:37:30Z), 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/DGA0M2417816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae5178b06a41a0f15196513206f21cbb4b58b53552f5101ddd48d1bf610431e. 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/QM3DF2275654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x000affc07be25f61607c64d88595d667b3979f126e6134a422f77542cf937154. 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/QM3DF2275656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091115721781cd0ea0d013752f119b3ed9a32fae153973b08d2b7fecc6e9321e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/FR59R2265780.
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 0x7733eb5765aaf9a163c9caa92a4b3ae815ec225c19eef7024ac3fa9c87e72408. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/DGA062253046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62e84c3d003668fb81f3b3ce95e0dd121a41c2bcb6bd0d0bf58e24a7bcae7568. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QM3DF2275641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13384dd7ba9d940d0840bfcce69053f185d59e107e9a6116bd68dfe2b94379d5. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QM3DF2275671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74fefcc65860b1267b7957bce5122307de7ec7c8c56e0682d7cc5db833c9896b. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QM3DF2275653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f8bd0cd3f7e0a6f0ac56a9bb41ab24456c16fafe1fb789af8737f079340b0da. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/QM3DF2275655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93983f299a7e42f2db33a42db75b6f9462439cc2cf9607e4baf2359bf3f2568a. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QM3DF2275657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a7a865f13ef64e60223c0d5f1333a841144e5ddbc2775697aa30d45bf469b2b. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QM3DF2275658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d27959157eb4b71d6b6e26cf937afa82a3a31c9f34957e36dd87743fbd911bb. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QM3DF2275661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f098586bc20dce5fcfcc54261f78446cb7eb3658b6b73fe42dabf6656d72e78. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QM3DF2275664.