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 0xf9f1a1c66ac13726cfd0b228eb5f25f88438d71af3601628820a6f3622c1e41f. 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/b447f56c-6b25-45e1-9f23-900c1e8b36f5.json and https://artists.proofprofile.net/proofs/artist/b447f56c-6b25-45e1-9f23-900c1e8b36f5.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 0xbf247bbaea6f697c3b1243036993f4d4d95a80f4d69509dade56f5cefe80663b. 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/LTD761600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2be4e9647c62fb8d7fa000e57c4cf01acfa78d87937102c0eb03c7cb95576335. 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/LTD760100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c58d00809f9062da099899952ae04724b279613605603d08db1b7acbeb754b9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/LTD761600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb18f1fa36ec4bbe3ff388c5f8aee5764cd1479892564466e45cf82b834c0811. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/LTD760100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb165f24c50ede6380fd2ebbb2091a9cadeeb1e0adf9f58206d3bd5bd579a3ad9. 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/LTD761600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4af3ebee876b23ebb3e0ef816b8ab11bf1cb3a49aa47fa7e26e895af5c4b3cb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/LTD760100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73a7157da227b1eca93ceb1d6ec95241b1c83f35b0c549b01924888572e126a7. 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/LTD761600008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde5a9ba27371213ea50c1c0edae39c8f7abddcc1ce0bd7065e548a9df40e0679. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:39:15Z), 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/LTD761600004.
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 0x7ffe632b5ef4a9a0ec7cb7f175db39b1dae5eeea14395b4059b7f62a56d7b99c. 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/LTD760100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52666f792ec0cb8d8916777efee18d103a4d09d76ca2158432bdb2e9dc40e469. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/LTD761600003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a534ebebac796bf2f8a2e3baab53023eedcb070a50eeac61368f79aa17b21d. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/LTD760100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35bdcd40a03291b87bde5050698d736e09ea311fcfa2bf3954721de9885d7d1. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/LTD760300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d1838d42f5dfac1d829020896189778c3d93bfb267de101373e0c2d7eec9d7. Chain 2 (Bitcoin): anchored in block 960383 (2026-07-31T09:50:37Z), 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/LTD760600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc842c187946fefe6f77e71a96a4d200179fc965b64ab9bd25d2a33b55f98b1cb. 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/LTD760600004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a72f780faf85e9ce265e11f196facab6edcc54d8f057353b5a02decbe3641c. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/LTD760300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0556a16cd5c5871087ed084caffd575832cd02a0e16ebfe999782768e0efc883. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/LTD761600007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c18699ee1388eedb0b6f184b814f93aace390b0cda0c2d2b017c949cddbe78. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCADW1868051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878da277781ca6ea0dd4c3213a150daccce63d53487f0c101ab94a08b1fefbe4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TCADW1868033.