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 0x2f3a710ba37599980785b2d552ace9698d40886a72332d2a4e14ef8b4e8b379b. 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/d0690626-e8e4-4644-905c-62d6d2b07e69.json and https://artists.proofprofile.net/proofs/artist/d0690626-e8e4-4644-905c-62d6d2b07e69.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 0x13b1af16205a432f60d942d8c0f3ff4ab2073dba9a18a7b23ed46063f4898141. 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/UKXN21949654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c9001a7b2bb955883c318c047f103800f05fb253ea54d9e4b21894689c1f6df. 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/UKXN21949656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67555e3bc74ee504cdf2e03d62cee2ca7548ad84b1b91cccab2a303fbf11d4a9. 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/UKXN21949649.
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 0xda5af3286222e1651bc6e95a75f5eb9f5a8881fef9facc8df9534ef839490fed. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/UKXN21949650.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499866f72c8e199df91a5d8a607030086a1f67cf63ae8e11096a77e191130b33. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/UKXN21949652.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2af26cbe3ac29f7e38af5f652f6a89125966ad3e73623eb4a9f38d51b0c2170f. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/UKXN21949655.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6b0979743bfe0e6cfe3d49d917c2b9d37c5b24a4cd4d7ffb95e824275ce0607. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/UKXN21949658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe467ed559b68c592cdf8fd69f9cdd50f604af5725b083e721c1e8cf78483512e. 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/QZDA42410433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x136e19faef1a67b3bcfea61a6c059cd04a7420ef40e7bc4189ffac1fa47f33c9. 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/QZWFR2356239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e6da2ba1b75e1b4bbb9595b7fd39438141da6b0cac88fe09e8a6201e9cd2363. 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/QZFZ72329951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37bec824b0c97067ef5af3f97b05bee329a66607152f700d0d9769bf6177d0e. 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/QZFZ72329953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa34035da76a613e390ee3f1a1d9a83fe73997e17a20673a79de0191ba9fc5a08. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/QZFZ72329950.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ebe9a89982171cd2af5cd9d69fa0f89de9a951799da0f04b9de43e3d5dfd449. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZFZ72329952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1891963cdb8111c10cc63b7085f6e3dba1d752ad82b34faab5e13b784379a110. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/QZFZ72329954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e3016d92623cb6e2988791b4bc8b6648daaf2d2c03e167c7794ad9cdfccd0b. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/GBLFP2095819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7d6b18ec933fe5eb561f4b760d1e129522d7e2f739c41d48f0ec0c4bfbe76d4. 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/GBMA21983511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda86b97445de832b9a55d98b27d15873c25d57e267f3a3c7e147b42534b9b361. 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/GBMA21973049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd1c879674df6934f555979fa26eef74f5d8d365f694bac34d7af54cfbdf7148. 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/GBMA21816492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x797c3a7fad44c4ee55740bea9561aea7cbfe6109366bec5495ca9bfd623d9b18. 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/GBMA21813329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5560897e61ae32f02e4fe50c9f10d5c323d4b619c965bbb214e7bd95cee66c73. 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/TCADR1839737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae21f689d77540aae05062fff9f5d84c710d794472e3d48eae5b84c0722d7012. 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/TCADO1821756.