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 0xabf631df66f53657573f2f8c9dfa2889ccea935d7486007e73f7fafb4874ec75. 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/fdb8b34c-0673-4e0d-b70a-fcb181a05e5a.json and https://artists.proofprofile.net/proofs/artist/fdb8b34c-0673-4e0d-b70a-fcb181a05e5a.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 0x7222f7b8d9985cef3a119245a72394d26ab94c72c7ebd50cbb16bf30290dd6dc. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/FR59R1860154.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7511b646d7ee98bd0d98a4995eb67c07860c91e6da147829a5caacb042ca043a. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T21:43:49Z), 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/FR2X41999842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efa3e0cf8fa2535753e005044f4a334b61e0bd4d3680f70b453135b4c105764. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/FR2X41999843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x430ad2f9c6f16abca825d6052b12530e2460ab917684fcefbb2b331bc5b2be79. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR2X41999845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aceb4a6ac497d5009d9f844fe16548492f29a9b05ed8c2180d9d4526151c43. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/FR2X41999846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dc10acdde07cf281708f8ff626fd47e1ac81b37e51d544da1238f807b17269e. 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/FR2X41999847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6230b9ce60542007a2b6b8259989c83d47fa8cf7992a0f8a1b7a45fdc3a0517. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/FR96X1904022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd281f8c5ca2e3274ad3d5346047bdf5696f46a87fdd332e8dd7ab0364a841f52. 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/QZHNC1977115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49009ab1a893327a30f33a53d64c4c93f23787bda7bc1e3b6f1101a70c491a86. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:36:49Z), 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/QZMEQ2003684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ce82dfa44cab3796cfcbce6daec613b311c88bedd5044a9f7c540d989472bd. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZES62157951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f3a5b1c830866044d658ab3818f43c451f8316e9b171bfb6ee7932b88523c2f. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZHNB2189802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x719c279ed9e3493d541c784bc8857c739e14e0518500275086fac82128f652bd. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZFZ22367917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacb5ee33ae70e550f62d16aff945be75897f3ab27da8e1fd85bbd9b24c9c97a9. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QZTB82374869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x587f796e3a843248c8c1813e05593c2c7f6f5bcc4c75bb7ef40b9f30066a01b0. 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/QZMEM2492243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa56fd38e29cdb2d6277828e2824eb35ce208d7a12abaaeb0f7e5c4abb7243. 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/FR2X41810493.