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 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 0x8684a541ce624708949f92f7f06b77cfda2634a0841c3261208f65f2e44cedd7. 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/49970e50-b9f3-4b03-bc8c-d11b85b948b9.json and https://artists.proofprofile.net/proofs/artist/49970e50-b9f3-4b03-bc8c-d11b85b948b9.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 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 0x34cb0627c453230d931e6dff1b75b65c1dea0b751a69292d915772450f768367. 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/USET70916401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9fedb4b17a15e3b726ec65d8fc1599832e9941fa9cc31dc1636d9d1d00f131. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USET70916404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84999ee0708434eb4567162c48f6364b7378b0ff3ea7168940c8292426f29b77. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USET71517503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1536f7b838150389f2f4818cb3a34ce2c95ca0aace70054b59de19ca70831cc. Chain 2 (Bitcoin): anchored in block 958600 (2026-07-18T19:24:05Z), 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/USET71517504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb59ceb608bd3c9643b1ff4350d175faab4b94a85a8ab3256cc135c516baa456a. 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/USET71517505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x353bf1ae1d919448c5e95f51628f4ca5f08ba51a227dedfcb5de58f15cb6df4b. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/USET71517506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x196710dc91973256f611cdf7c020d83131145ceb435b334c19064e8b8e071a41. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:42:21Z), 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/USET71517507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x557dc4e27b5453428484400963386bcaf6fbb02747973c653b6cf8a7ad16f8ff. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/USET71517508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47570e93eeb27dc3e172e9840439f274d7e250f4efa45b419ed316ef3dc2c9a. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/USET71517509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88fac670493fe4e7da78279d01e2b720f82b0e30132e77bfcc16d24a610bf6e3. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/USET71517510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99b950e8eb43bf43e28aab52ed157e66702272172d683b825cf1341d1fc8d40. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/USET71818503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf939f90c42a1f23792dd7eb2b1f2f663836b19a1130804bdcb3176a45668fe02. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USET71818504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58871f3aea81c2e1f50d801bc93202c7af6a03720bdc691b3def5f83d0810922. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USET71818506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbdd5a8968e9f6cfe90a3e1a2ef26d9a6d84e7bd0841fe14d31deea8f21785. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/USET71818507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7fef13aec315f627c08124f654bb70cc7f6708091bfc05cea84a65a73c2945e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USET71818509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03d8582a9c7f544997f9d4132480e61122f603cf13dd2c37fd4b80f5fb4cf607. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/USET71818510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8fc16366b587152c30b98d4213174ad9dca9f6bc4cc777b0bec1817e1c88777. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/FR33T2379007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7177dccff1e923176100d73e7e31be7727d444e52780d6eda219e2206817adb. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/FR33T2379009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7b3c12a7238aa0b3a1d13d1f09dd74ba3bd238a99210b2871e498c9012d49ba. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR33T2379004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7cc6697c9e1b14f1f51f0b4a1496e778b92e630ab9985948b5d32cf1d9982f5. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR33T2379005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecb828190ceec8cb0c290627273f59ec0645cc7b74eaa8ca23f283a5f1c75696. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/FR33T2379006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b552263150dbe7b7ee0ae710cea47c4868416d52a9fff39ae528335c4ad357e. 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/FR33T2379008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7177dccff1e923176100d73e7e31be7727d444e52780d6eda219e2206817adb. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/FR33T2379009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x237dd9c6a71414133dfc4134d917c93f066cd99b69f1265cbc6f3d5fbb141a3f. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR33T2379010.