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 0x031bf89418c9f3deca24ddd87515ee76f7e0ad20f3821458a2baa97f59ddfe87. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e8172d4-fa43-4041-8c16-7a6e732d0a15.json and https://artists.proofprofile.net/proofs/artist/1e8172d4-fa43-4041-8c16-7a6e732d0a15.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 0x31455175d24c9ea2f1d9bf663029a344deb486c17cd58b98d2f4d7f9e1b13ff8. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/THW092100290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd02a5c12b98adf7163b09582a7df2194c80431072aa7f75adcf1e6ee20002d1b. 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/THW092100291.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd59b01759b5546017488317aec2717070df1239eae09033bd167cd1a5cdf2a. 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/THW092100292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8747f3755237403b9c61929d2d7317b1cae8bff2cdd15563279b24c7170cb7df. 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/THW092100293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d63ccb7130a3c42469c4aefd2e966d7424bec7194261949966b2e659bb41d8c. 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/THW092100294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21efea2020f62a68c20629f4ab255a3ae0c18ee5b884bb4ebf44f9b774fee6ac. 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/THW092100296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbb1f1a8eabb68463fcda91369f9c8515e4a2df814605d98fc83c0446eb87625. 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/THW092100297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14dfa888c211e3ce193c0be64b3c1de0b2b86b7ef826ca4234789a9c86e8671f. 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/THW092100298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71ab4ee0173207040e2b14756f27be576158c0d114533f71c37cf56d9b7c85c7. 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/THW092100295.
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 0x8375816cde1b182aeec54138a91e21ff2c3f8a01ecdf4a04bb1c167df1c2ede4. 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/FR2X41961741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc38aeee8a1540ebffd06abac2efd92be924b34e950ffaacb74308c1897b5bd5e. 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/FR2X41961742.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f2d306dd372578a8b181e25892a63fb45310830506a179a20e164427fa093fc. 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/FR2X41961743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b817994e594b6a5deb8a2df5b6b555945a0442accd2fd7f7837613b612b60e. 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/FR2X41961744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cfe1478aebe95543794666153fc07506b26439cc20879e222c7ed520040c636. 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/FR2X41961745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13892fadaeb91b5d64cc23fa00310672f76bf5adf9cbfe95f06922023632dc76. 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/FR2X41961746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc007f17de6796b670c4b2f22979e781f0978ec071396ee90eb444796e9084e7a. 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/FR2X41961747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f1830b22803e5b49ad8d0d19725766472efd30b6390a9b5145c39c6ca2f4e7. 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/FR2X41961748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94de1a5bd7189213e675533dec81ceaf790c385b51bf5eb9fafe045a94b9896. 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/FR2X41961749.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d52b88bcfb915f7a4b83a394eb0c1a37bfc2ef550defdf0d258643bf8eb08d. 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/THS082300201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x597c26b95b936a1bd650c507a208d9ce0c82373023725dd22ece2d74f9e94aef. 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/FR26V2029507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0946e4ccf6b352ca31262a51ff922486aee8cf3d282d12ed33f47075b70c1bca. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FRX281985877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf241126302a6c0300bfedcaba9267e8de2f89daa04a7103595792ce6b4c770. 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/FRX201803393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d2dab5f583e4ecde76a499f10143f91b8240d135c3e0f60a8fffb0aa15fbf60. 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/FRX201803395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf848c589e32a44c6691b682c4e980459caf12f56140cb70c987defa29f75712e. 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/FRX201803394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5705b3db8eaa69f613a2eb417134c1add83b21b3bbf31f7483e04f3f0489270a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/FRX201803396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3271c9dcb09e8e644cb3f884c789b75dff3cc5588c1fcd260859371346c41d. 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/FR2X41880064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58de422a69da07294adf3577ddb43ca10f4096d057c20f576204a13dfdc01d64. 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/FR96X1744423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ea273f4e2c4bc25dd3d9c7cb2622735728a5a40b17d66d08a7c0e82c3e1a8d6. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/FR2X41769744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd18e766cf73db0460c24dcfc2607d0527701c42435f67800a011893dc33ffe64. 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/THS082300203.