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 0xe379c313ea3368cbef1d3e04510b0d9955b0c327e9ccb8726dad2676f7371595. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/009f0176-7384-4f61-b792-0a8f520ced61.json and https://artists.proofprofile.net/proofs/artist/009f0176-7384-4f61-b792-0a8f520ced61.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 0xf6d7d6b602a0ecb2208a6c54b80d180fca33f6c7deb0885e14110502c90db0e1. 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/QZNJY2472636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc73822dfde2d7a9752cf5d86977d8a2a1073033e2c0a8ee859dcb23b90db301. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNJY2492200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae3acdc466f1f34031cad3eca72a95747c4ffa8e95646355920532996314191e. 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/QZNJY2472655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a0f641b0ab8a63a6dc777c876f5c81989e1788b46a688c26284f2076527241. 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/QZDA82468680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa99f2ab9da63851e6560c46dd1d615fca117a0eda19cc8acaf0801fe12121d02. 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/QZDA42430345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7729a12b0abc5cf6b152ede76f95b186a50f9e1279f16d6b9505ad6b8a168a9e. 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/QZTB32392587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6aa64bb861b91f560966d7b615671821bee0e4ea624651120b69f345cae6222. 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/QZNWW2398033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73c2de631804941cc107ddf43a2bdbe6583cdafc3f7d4775003123361e9259fd. 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/DGA052225412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa170c32f132f23fc0b0939c506cdbd4d3f3b46b3ee8c63357dbb7eeaaa9c7c3d. 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/QZNWT2252825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e980d44dd3e231be7f459c48ef1186f46c619769db2fb75eaeb76c5650d42a. 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/QZK6Q2219217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754d339c79fd0e835ebd3e4d75e9d585207d49408ffbd28e443799c4bf7c40ae. 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/QZDA72200120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3567693f3ba9a4cb583d087bb531f38776b574bf4d6b526e80679e8afc8ea4e5. 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/QZPLS2127272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeca7998b3931a74c96db244d57b8e324a922bab665b3cb32d1457c41d8d3c25e. 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/QZNWQ2112628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77fde0a264b760550553dc013463691c434687ae5e071a66a6c88a5e79cd651c. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZK6F2173187.