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 0x68f65967cbb57164a98f36c5dfc9a72613e3abc610e90b9ba9afcc27fce7054b. 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/f6752c0e-e537-4ffc-b873-6b54c55dc4c6.json and https://artists.proofprofile.net/proofs/artist/f6752c0e-e537-4ffc-b873-6b54c55dc4c6.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 0x0c0bc73a414231af4eca9e571a8cff5542b82a992955d4974f16bced937aacc3. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/TCAHC2300794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca65db2238b887dfc4562531794e13d68020891bdc8e7b9ce43caeeec88530e9. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHG2380509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78843504c9fe13d0a3ededd2401778c9b177c325a41b0b403c641a03d6e4a87a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/TCAHK2329239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c99570cc80397aef655c70c3a07ff5dc67c4f5d4f8ff95d54c1ac8223156857. 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/TCAHM2353099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x776906134f3742bb19abc7e26ee9c314339a6c17597eda47e21dfd74abd369b5. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHN2346828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ad8cec8101a4a6c50cbface53adab755d63a9e5b00fcc2b9ca4cd76a0d42da3. 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/TCAHO2365585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0db584736b98d0b5afc9423f0c9c16ae4c426a7421aa1385767f9d71c214cbc. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCAHP2329059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54cdd575d0cbd9065f6867e277634c6512e4b48c6c32499b19cebcfd7f253b2e. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/TCAHT2315399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411bdf65e4c5653094738d2f0963ec1a4680a09ca03fd7c12b9f483427551c2f. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T02:55:48Z), 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/TCAIF2494013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12bf38ea3e35ada5375e70a6319b32172f7268d151ad1d56817f89d4d1484ea2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T08:20:52Z), 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/TCAJB2436701.