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 0x7df0e01863d37a5543acfdbf82986a243496f3a4ab0d9cc40b51309a5c4533a5. 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/52b7d503-b86f-45f4-bd65-53303dd69c88.json and https://artists.proofprofile.net/proofs/artist/52b7d503-b86f-45f4-bd65-53303dd69c88.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0x48af79f995ef10fa23e5e18077f52ebd87bc467cdeb77830cd65d28f275eb78b. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/TCJPB2485910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x260970c3c771a044815f5aab23f17f3999f516c5131944b9f223d2fb613b95d3. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/JP92N2414910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86216facab0b0c926a02abb2226d8b8f94608834912bc6961087c64ae57dc0a8. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JP92N2414911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131860f32599596ab7709d648abbaca2dcff22dff1f448c6e18c0bbfbf6a7fd8. 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/JP92N2414912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcd1ab017cd04a9360079dc718d7c1d531fa93efe2b1163cf9192ab852c8d524. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/JP92N2416271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d38e0d226aaaf746504a773854650385eba856c384d64ae4efd30264d898359. 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/JP92N2414913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4316b714ffffc31a823e23f8a7db535e4b63f0b423b333dbe1b3cb203f5f8d85. 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/JP92N2414914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a90109a91c8f7fec15320a3389a91f74a1d0190e87b0c5f5adfd69bbe09cbd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/JP92N2414915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cb88cd5013d89a86d0e39d0edde08bbd6f0a2ba8b5c767b320a3d56abfb5a28. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JP92N2414916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0485060f619b6926fa78de6722a76efbf9e1a0e1afcb793b256075adac04ed1. 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/JP92N2414917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce33aa45821f6decc48c7aa4ecde976d7f7caf056f43f015b5c8ca245f5a3e73. 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/JP92N2414918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e9524bf5435a21873df9e33e40b0cf62b4f218e39779f05d07d104a9cb12c24. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/JP92N2414919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd82181e9c653bc63c26ffe2d7ee59c7d283e68ce8892097ccae073d4667b47e9. 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/JP92N2414920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e46c652d3dcf4b92276ff81f073cef857a6cf6aea64745c93d8bca83b0cde0f. 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/JP92N2225072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7768c1ab49f929aaf2cba9040c9afa1bb96798323784c1fd7b2ecb791c448908. 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/JP92N2225073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b25c3824a4048a30eddb95789f41c4cf785f8307c930f0e05d376efd489ab0a. 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/JPB602183805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aed62c8aef00ad84c42c9246d0b01b9a76d8dde9b48b8c6f213822aa39f948. 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/JPB602145814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7512f2e73829ca56eaf67205dc61aec81c6110f4aefe2f571abba69ae60bba. 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/JPB602170077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737c2a20aa0a2a6217823f783fcd88d16ca5998ed5d9f8ae4f9ee421e6a7d70. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/JP92N2225071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e85ec250937b5cce0939ce6d8f79cf3525d7093de9f15226b239c2676217a. 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/JP92N2221917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aff30c233643a25aa4247a28c64c35b03d61bd7a9de5099828af0113d149d2. 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/JPB602178611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c68aae5ac39c859d80d87f15a239c163607bd12e05ae12a51f55eb819f171ca. 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/JP92N2225074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc40c509573a0113a19680fb91a0d5941d7d51d357f69676fd73bdeadf1cc5c0. 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/JP92N2225075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7040746945e6841c86c395fc1faa6ec9147b266f2f8a98af7e8e55ccc10b0408. 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/JPB602199533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17397fe363e9677bd84fcfe62ff7557ec4bcde98c00671f49f6873850fe8e597. 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/JP92N2225076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f10525ba68d9602d813ab7e29faf9750df72e66a36ef9a5aec36218abbbb10. 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/JPB602193012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8231775ea89317543ca4d1e57578e0971082819266e6a66a4ee36293aef8f94. 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/JP92N2205587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131860f32599596ab7709d648abbaca2dcff22dff1f448c6e18c0bbfbf6a7fd8. 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/JP92N2414912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626f258a8080032d79fd0224658d7a39e60cfa2d9a1afa7c25aefd31c3b8912f. 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/QZSYP2359901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246095ac4170b489aacf52f526b3bec5d2c7bc11bcd99d03e4c7adf27e718c1e. 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/JP92N2318545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8846da780e3d9636a27df11aef328a7e84d97c13747b874f237e0ccb56750cc4. 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/JP92N2262153.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3737c2a20aa0a2a6217823f783fcd88d16ca5998ed5d9f8ae4f9ee421e6a7d70. 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/JP92N2225071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3e85ec250937b5cce0939ce6d8f79cf3525d7093de9f15226b239c2676217a. 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/JP92N2221917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8231775ea89317543ca4d1e57578e0971082819266e6a66a4ee36293aef8f94. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/JP92N2205587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8aed62c8aef00ad84c42c9246d0b01b9a76d8dde9b48b8c6f213822aa39f948. 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/JPB602145814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7040746945e6841c86c395fc1faa6ec9147b266f2f8a98af7e8e55ccc10b0408. 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/JPB602199533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aff30c233643a25aa4247a28c64c35b03d61bd7a9de5099828af0113d149d2. 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/JPB602178611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7512f2e73829ca56eaf67205dc61aec81c6110f4aefe2f571abba69ae60bba. 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/JPB602170077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b2468e7e4a63167a5791411332ce17c1abccdde75e935a2b5662494a697c0df. 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/JPB602165265.