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 0xea166d0b6f15c299de72d4e816a425c152dc7951d662768ab2efd0704fd32b70. 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/a1a28b95-6a0c-46af-a58d-c78704fea87d.json and https://artists.proofprofile.net/proofs/artist/a1a28b95-6a0c-46af-a58d-c78704fea87d.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 0xf943f748d43c86010973109c346d2407ab3b2001dd9dcefee6350bfc227b9ad3. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USKO11300789.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9cfd2f3bcc6c9c8a11ddbf5c98ee03fa80ba1dde3c2e83ac41633293de500ab. 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/USKO11300820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf007d05b75919e575fd84902ac5aa7361c54ed443eb5b76cc66f8fda2cdffa7. 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/USKO11300819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcbecf194d730651774ca9424e3aae97f247eb1941ce84cf65c4c1682e0ff0ba. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUR10000514.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e4ff97904883afde1cd6f8647520c5e463064db28d9821a77dc8cfd38df8a8e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUR10000834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc890e4da91f00ed538ae20c6eaf913b049b3edb380b293e6b28039ecbb4fcc00. 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/USUR10000832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7c10e7b0f953d8123ddda043c0591edfe6074db3cba59d5e1c9a61d8e551a9. 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/USUR10000835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff8b45b25531d60a9070c790db10ea56cbf835772615d059522d127277c49454. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUR10000830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcea21471535b5678eaa57584baae7cc73f08d20e1b2f484955a9e1719b2a8479. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUR10000837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd705c8af4d5ac4575b6c6f0030b628502bca92f8808ba393e5162d5091f540eb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USUR10000836.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xead37baaf442fd8d46786f46ca5bdb1445fc665a241be3733511b7fc85a03fa8. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUR10000833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x452095687855fb65f7d1176eba303642c0175c468259477a7098baa3792037e3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USUR10000826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe88cdad81626e2759219b104bec5140f2c8e36f2baaf25b2275b645a91e3faa7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USUR19915010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f75b05aa1f499272305321c3268f176082d3e1468157d9cff96c74ba3e10670. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMO19700169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30324d5fa061cb6cf72af530bc99b8cc9771dde95bf51d19786cde7aa8a6a736. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USMO19700170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab5014aa61d96a2ad2759f7cd5ccfc1ee1b8887fcd79582af30a8bf985bbbb57. 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/USMO19700171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc889a171e44bbb207d2aa56ad639a1ff2d30d50298f02ff9da5c60e2f789ce05. 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/USMO19700175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875f6136d032010bf8ab93755ce4db8fe767419a87e2421fe2a8740be2414dd7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO19700178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa4f42ad78a0b014c3bb9a398824751c07ef8730256f8c1cd84de998887d87a. 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/USMO19883527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2748dcd891432c6fe770e43f2089c87ac449c49775e0b9076c50674191f9de54. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USMO19883528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e3709395b513a918bdbaa6a217ff519a271abae8ad2ea28977c9adb30c87d. 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/USMO19883529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63e7433a01a05f44a9f3d5e6edeaa776ede8d13392995c1df8feb154ce1db84. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMO19883531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2ff49ea29b0a151cfef9d695bb6568abf1779108302f122c5c01efc4a4b06f3. 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/USMO19883530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e485e6d17230a4e588a473b706a50b55b038ae4baae385102a8af11093a88bb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO19883532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e5e362c5fc5103be4867ca1243f2855f29940a9d521d93db61dba93cb619fc8. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USMO19883534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10a60418c820490b7d894274994ef72b7d513392945454eff08aecaae45b73a4. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO19883535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec767268a440fa7e43613d1063afa2163beb1ea205b9b9558571eb1a746786b9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO19883536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cd59ecc917d6a0fa190c1db9a98b77654f95b62ba063a30a45edd392c4d6b05. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMO19883538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f75b05aa1f499272305321c3268f176082d3e1468157d9cff96c74ba3e10670. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/USMO19700169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1cc84be9268d8a34feef0a3888f9ba32efa9144cdccb050e7adc603fdde3553. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/CA5C82200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced228ad1aa3fb111fad3e695f27bec59e2ca8186a0d9fc5a0aee2c911f8d5b2. 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/QZNMW2103277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa75b28c682ba63f5aed374ab2d47c0cffff63f2b986a7e3d6af359a3dc05f3ac. 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/USWD11782704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd2e3709395b513a918bdbaa6a217ff519a271abae8ad2ea28977c9adb30c87d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USMO19883529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c381678de00ba33b03fb76d91def35b8da9aabb8c7e8ea52fcd8a6267ee5634. 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/USSM19920980.