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 0x3f93ffe661b4cf9a07d1217c01dcb4bcc83dd1ee37c70364af99844cd4d0ce67. 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/4b0fa0c2-d4fd-4b70-bdb9-da1eec591d94.json and https://artists.proofprofile.net/proofs/artist/4b0fa0c2-d4fd-4b70-bdb9-da1eec591d94.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 0xe6a710178ec64201612553e2e81a7e1ce64f3f7dd06720e6f6b0a7cb0e558905. 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/BRFIN1500225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x784b11fefb96ce55f886d7e13d33940e8e9e459f3ac19d4af4c31142f82f7a50. 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/BRFIN1500227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e883676766e4e456f5ea4e26e2178f99b1abec512fa92daaa271e50f30bbdaa. 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/BRFIN1500232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece51d61cdd28afec7b0e676c7c9a2895b023818c72841798520a6bd8c547930. 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/BRFIN1500224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65f0e42e1629888d76e76edee1083ae2188cb28816d04453e5b30422c3ca653. 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/BRFIN1500228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea6e29df552a6e0b9cc6e32364b778ce65fb7d205c3915f7c890f6e8126b951d. 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/BRFIN1500231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b7258f23537f15ba5e62ec917cf27b1013fada655e71486cd3a87ac26328444. 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/BRFIN1500226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6559d51b0ba93db6bb7828c3123adf71b8439a3d169e6fecebc01e36bd5fcf9. 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/BRFIN1500229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x738db282c5074dcdeedae1a7695191712a9eef28242c6a77108bf07cc2c4303a. 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/BRFIN1500235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b067ef99ffd00bcaa31fceb4372f453409c7d23b5a537ef627c538d7a4953e. 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/BRFIN1500230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcd6b8174be6933d082a43c3fe139322045b77135d9b7fc941b831f0c3a2308a. Chain 2 (Bitcoin): anchored in block 960185 (2026-07-30T01:32:48Z), 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/BRFIN1500233.
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 0x1ebd6f4b112979cc28582306cefcd76d3c5e6fb1c9ea1961130db684c2e65fa4. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/BRFIN1500234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44161ce26b1c7620769ec2a283e60bc010570a6a649f2ca9460651d1c4abc1cd. 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/BRFIN1900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb19099b8b0bad25a7f67cb0a8dbc7d6d9db3af0548f2f83540b27d62f4e561a8. 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/BRFIN1900006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815b2fe831dc54bca485d342378c0d65fcc6954f3f7a4a10172d6d6d0d9795db. 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/BRFIN1900007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bce8a7e2f40d398f6489a876349a9edabca60bb538f0abc3d3920a063d75146. 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/BRFIN1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a5285c126db9bb82130f7ef7e66377e82cbc29c22bdabb58e8dccf891e54ef. 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/BRFIN1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc15c3ddd06a39923a965b816401097427ab52475ca04eb736604282384bcad0. 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/BRFIN1900013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17c0f3795be42cf04acea956feb0abf0ace3f0b105ccbd95dcabd2575943435e. 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/BRFIN1900001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6963d0374ab4e4679b915e15ad018ac3beaab3239a49eb6e8e6b446ca0dd93c. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/BRFIN1900002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33a19b9bea2ecac97a9e896fe92f10c40d39efef545c7eec5aae6a275482f875. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/BRFIN1900003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cd0877dce3739a3ceaf230287dcb64e35f45888dfed5c762d3f6e1ff19b3531. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/BRFIN1900004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5833d4583d29dd1f1245014afb98fa03b95643620a3b092cf1125e89791ed0ea. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BRFIN1900008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aee628d4efa3215a25981898deb96d3aa8ed486f1db31ca6c1ae9f45e15a707. Chain 2 (Bitcoin): anchored in block 960404 (2026-07-31T13:06:57Z), 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/BRFIN1900009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc18b4a71d69945f362370887a0a8fd5880fa4fd8481133c4855ff4b94392b0c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/BRFIN1900012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1f2cdde9a09ee930addbb63ae408892f37e15632ad224123c1a11cf62de2f64. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BRFIN1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67eb56b5da269811c5c95fd97adc5e5d0877d8d9ed82d44b1342165e67d1a29c. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/BRTRB2021439.