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 0x52e52b0f0886f25914e097c90cd1b50e506cf170592ba3ff463094f096ea91fc. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e19ab1a-1f31-4144-85be-e889c7aa27c2.json and https://artists.proofprofile.net/proofs/artist/1e19ab1a-1f31-4144-85be-e889c7aa27c2.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 0x81713cfb1f3e387625d08785015227377764e860332dff75cecaa0b33c65ad16. 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/TCADY1858530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6ed1df700c35f5109efb191698bfb5725f6c5b0df85efdc9aff5e4edc8caff7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZFZ62265710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f746f3a25abf39e638f83b3da83914317fc538216b6d7a5fc1daff1eb707b4f. 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/QZHNB2141378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b0f570b641230a6622a5c915924715fd1d83f050f2b5cc1f8754f2566d60c8. 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/QZNWU2081321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cb772a7b739d664d53980df7a66f1f38e3860b4b020c6f580e6d5d0d905e5c1. 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/QZHN72085823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17585140ec60725260c552f3a663e0538e3b63bc002c72e764e3a0a67aa6e60f. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZHN72085825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9af44d571cbdd0e3e3f07837d2d67a46e3b45e8069f599461bd34ba0d0cb858. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZHN72085826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a8ae1f62773892d68b629b9daa9779db1a9b3d0e1b94057f61ac346f12a64c. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDA72003556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe84a7a8f09480d2c47f668ac584a9ff019b58c71f6f1444462cf96da42faefef. 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/QZNWZ2183712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4531fabe3631750afbb6e956125fe6d2b0b050692b57fa018790478fd43768c8. 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/QZK6L2222085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0bdab663ccab8aa3192695c3aa750d66f6b2795f1c0dd2d3cb97cad2fe1b80. 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/TCAGJ2263427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x925aa51ad5fe8399e042cf52b6061ea4c99693f3c1b761bdc7eff90223db9598. 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/QZK6F2202936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14780148aeefef137c22f9498681f0dfcf9966538c9e1f2dbca01ec1fdb1c51a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/QZK6J2058834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95603cc15bf5d314c40ad56a6001d81619c4aede99865ad463e259a4300bfb3d. 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/QZHNC2266692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe9eaa4f015ac298adfe59c2c4c780857d615235ae285a6c480a36a0fd0adb40. 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/QZFZ22164343.
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 0xc711cddf905463fae4deef5325e1f9142fc38c0787553bfc18490df964b44472. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZRP42215838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4cecaa9de3beb1d1fef665fe5ee3e06d89a83a1f49258254f70cdf9aea4156e3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZFZ61934399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd025377456a81dcd2c405570eeb8e185e3fd35eaca20e8cfe823fcd5b5559380. 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/QZTB22419397.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13b9cea4e9d9e2cdc845e2169a9d0d3dd184f7f84e00325b6eb26b02b104a287. 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/QZFZ52058130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x107ba0d9d344fa175d1a55bdd3b1b7c13acc3caab44bed25024565d2f589d052. 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/QZPLS2487373.