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 0x3f91487ce741c3a7bb00e70fd63e1d48416c0a1c3b80d71232ff27dcc721a20d. 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/83cc8030-c18e-4ae4-bbad-bbe200092458.json and https://artists.proofprofile.net/proofs/artist/83cc8030-c18e-4ae4-bbad-bbe200092458.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 0xe16c18893f7eee5e2f068b68f0cb190e91652af842b3c1609f0d84c2dd36422b. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QT3F32500506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e2995ad1cd70f17b3f60fc907fa6103cf9865b088080c2dfb4a8ab74d59a704. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QT3F32500509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10ab68d904f50a8b277606b272f97315152eab77323c0a4a66b37193f8a151c7. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QT3F32500511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03aca1c256d6cfa6abea677fe00a8565b62713a6e51aea7c7d19c0f7ba44b7fc. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QT3F52554445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aff2fe7a4bd2bed10a716e907374b2b48245e1192fb301aac167ccf7bc9ee93. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T16:29:06Z), 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/QZTB22397625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51ea2cd4d641f883d1d36eb32b35e2902229be32a458795754b1eb9b3ce2353. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/QZTBC2364701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x059400a5d5c2b06367b00885afae6d8178f426a9937aa6bf090579457febd064. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T01:08:10Z), 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/QZWFL2330287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e0a1d1fcc5f7eda32b46a9bb3faab8aa35bd3f6cbc39430bd6ef91e52612ff7. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZFZ32450200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15713e8a29c5d56d5bd89de65dd8953cdca90f3ec3398e0f8e99e416558303bc. Chain 2 (Bitcoin): anchored in block 958063 (2026-07-14T21:07:34Z), 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/QZDA42439807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32a2f311c2b62037a0478f674452086c3fd2308b3f8f8aaf6c476cbe17308078. Chain 2 (Bitcoin): anchored in block 958212 (2026-07-15T23:25:50Z), 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/QZDA42439809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e6b128e1515285f995fdd9ab9f5f83a0739f07336f8dd8d9ebbc100b501031. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T16:26:53Z), 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/QZDA72437046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc02b2155849af347c96af8c8ab5b4cd71bd1740af5c92653750549d7dfe97e. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZK6Q2462111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa887ff752b6128af95c194274f0406dbcaec9b46d3bb7d979dcbfa612ab8fe52. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:08:16Z), 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/QZNWW2444376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cc9b0c3b1b9b8c19145418df563902f45221a96a20a00c8f31e8e00cedbc430. 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/QZTAW2453270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268a0df9701b4017fcb23d953c1b17f076cc75f1ff81370930c360cd65f5a909. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ7X2464937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b7e50d575825e9d421d45115b949b9ef0e2f38d562c46f75cb16c17e0127f7. Chain 2 (Bitcoin): anchored in block 958496 (2026-07-18T04:43:53Z), 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/QT6E82517178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd3e76eb21d6869f68a2430aaaca8b9bb6e6fb13459cc557f435780497048d7d. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QT6EF2542477.