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 0x6c32d0753579aaa860a04c4cde6caca2da2d660063b62022191b073dbaeb1592. 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/91226418-17e5-4e29-9a0b-1a40806832ee.json and https://artists.proofprofile.net/proofs/artist/91226418-17e5-4e29-9a0b-1a40806832ee.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 0x04c1dd21116ed219b377908740ec5d5ddbd6fae4e0baa98dbee5569d0b7a2019. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/QMPU51635640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2544662d417c7d799b649f30dd945d120d7e75c025105594f669e1e8372972d0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:29:21Z), 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/QMPU51635635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1f79a75026dceaa77fe3d625b30e72dfd23b03dbacd2788ad2a78c3482aec4e. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/QZMEN2032026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61d497d9497fb7d47b939d0865a96e617592e23385535c49a9a6a2d060d91472. 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/FRX452322104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86620014c6742a8bbfd30c363d0ef72f6bf605ad02ec0f59618949ec20ca3fe. 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/QZTAT2181179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43fdc5bab96fc7bd75bb5d2fa2ee1b531de0e9931b37cdf3bb81b01db2c97ca0. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/FRX762297263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c1c83474f196214bc83c4a9c351e527c68a7bee9f10dd73e999a5df1da8665. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/DGA072277365.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a2510822780a955c3543ae35798ad8d0de6958840ada7e9541f4d7ad7b5d2d8. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2309116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad32b8720592522a519b202c5bd901bb7280d9f9421d9ce5615f7aa2a0baa56f. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/DGA092319434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c3de88000d0bb1ad3c2df397db1a0d6dee5df8bee88a9bb0f9abe6694155c8. 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/DGA0P2300707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac26cac6e4366f6fbcc6c2a61c5f0c9b6fb95ad0a8cafdf33f8e254a5dcdca9. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/FRX452424257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc517aec832f9e58632da985225352a960f9c77eea5a15d5ffc75360ee3295932. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/FRX452401978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x769d14b1cab09ec3ea83a721ae89ce44c11cd5f49eff4239f20aa0ce863988ea. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:06:07Z), 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/DGA052465658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x771fa33894a75610e62a88e33b186f3de580cbc12212367e64492e4dc42b7bb5. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/DGA0P2460428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdf63a3208f55f9f80e400b786ec97be991ed2396b0b144a3af3e4fc8383f75e. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/DGA0M2417415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd08b265d22bfca93eb410f2bda083c0dbb577c1a45eaf3820016729bb0a20fb6. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:40:30Z), 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/DGA0T2407067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a7b351999cae4d1ec39a6db27e1250d90e68fb9bdef1c7036313208e3b0813b. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/FR10S2565346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be759d19c8b5420ffd7cafcf0ba1c6fe0910b4043b29fc71029bc6c0535539b. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T14:14:02Z), 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/FRX202573087.