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 0xa62effd08d8d8f4e67f2c10896e8a7720244dfb109d332c858795e8ee7996477. 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/3060bbeb-e316-4225-ae7b-645ee755c4df.json and https://artists.proofprofile.net/proofs/artist/3060bbeb-e316-4225-ae7b-645ee755c4df.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 0x15e13c0e2ed2fa2871233e5fb02ac65c9f0853d1a004a901439850387dfeeb34. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/DERH82229503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bb96d59241cb155e25e23a858944070a6117af590a5833901f8316139c9b6c1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/DERH82330701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9529eb13ee6c3274b8c019a2ec9796d09d40dbafcdd839485c2d35f9478515d1. Chain 2 (Bitcoin): anchored in block 959096 (2026-07-22T03:48:36Z), 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/DERH82451507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78fa4200412e2c638fdde482329ec0a3151f05545c741aa8665665bd244b693c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/DERH82451508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x190835f94e84078d2a0b385d03c4d967437588d54c914ae9f229718760ee6f1f. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DERH82460801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cfb7ec15b34ecabb3326547a13f30dcf9fe03213563dd797d50fad16dea93f3. 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/DERH82462201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a8ed3c1fecf2a9c178281ae6a9950571ec22600fb52198c40cfa2b34cb14438. 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/DERH82464301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f7b6ab76ec73c3e90fa5f7618df1f280418cdd3691b94fde1ede97f75fed7ae. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DERH82464302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a98ad01751b1646fa4da1ebd4dfeb900818f75e3156c307a8adab43af72e6f. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DERH82465002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73374672651dca03979981ad43c29ffce6fa127cc3713be741e9954e137987e0. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/DERH82465004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f1f3b9da145d3777a44a352bab8af731d479f8eab991b83c45dcbf12b0ddb8. 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/DERH82465009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92dd6fe88437e5545fc1ed5431362bbaf3e0a5d72c605f7b73eb0e467fe9ce5a. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/DERH82466201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x270b1ba6c120bbc2a7687c17dc8a44d0854f81f088b4e71ce8f0cbe610d3e83e. 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/DERH82466203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30dbea3c12beec293d907d6049bfd73f959d570e4cf5bcbf3251f72e251e9622. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/DERH82466205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53d89774ce26ed8797c366bb8c83d680643d0f06619ee36ab53435f0cba36a46. 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/DERH82466208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e3e1285fac2695a5f57c9c4d69d432eed1255417028113d650c70888d2db631. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/DERH82466215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x896d8423e1aa9bf4205b5900de783dfbf26028be27900a48bfbaa2ae94410eb3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/DERH82467103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc659f5db585c2f4255ef23d3ddac7b35610469b428b13d6fe3fafec3a026c893. 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/DERH82467104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346681601ff813618a25c16025be8109cc444103e135d7826b1f7917e9919356. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/DERH82467108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefac638a323d5c6b6bc588b3682b3a9e3447dd6ef21c32039c678a973778b5c6. 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/DERH82467110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0be96b14bdf49fcbd6eecf89d25d1aad40d1c75ebc47089c70bb7377e9b382. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/DERH82468801.