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 0x93a26db322c7a94ecf1ac68f43f1673722239573ac6e0d7233395bace61d92ce. 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/4c7f8e6e-6bcd-4afa-9d75-38128c5fa819.json and https://artists.proofprofile.net/proofs/artist/4c7f8e6e-6bcd-4afa-9d75-38128c5fa819.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 0xc144e1831818eabcf691e3b234e0ede90b83a584322ba05e0ac94190e4eae35d. Chain 2 (Bitcoin): anchored in block 957576 (2026-07-11T14:19:48Z), 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/QZES72127256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab6915188a46f1c8a537c5372c78b0efd60b86b80f693408707d29d2379e382. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T17:50:09Z), 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/QZHN32108315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea028a88fad4b33a0ec2696e8aaffcf1b519d5c52ce5069115b147191d349834. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZHN32107366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd62de489ab93a103c1b9268b0e122ff572870ee121637ad011e5dbc2657587. 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/QZHNB2186803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58ce5dd007552d7e179b34c3aa620e9297905bed58a76d364bca1fcfb31a960. 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/QZPLS2182174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa62d3804c9026fb8be2f68b09ff8d4b4aba9035e0143eacb7709d61e2465d49. 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/QZRP52185302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ec603345fb3adc248308f3477dc5ed83c8a2746d5afeec15d731a078654d09. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZDA82233360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c06521e8400253e83e340871a042a9817a36bc4adf0b05a28461a18004b4521. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/CHF032397543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23dfb69013464df42fb068a500a878bfe22f3297de314aabaefd269ecf332a7c. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CHF032403086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc315d122cea1793ab0f64742c12026c44b59ad604bd81e5d2ddf3c4c23cfaebf. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CHF032403324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c2451bb20ff06407ab26bc5ec3d16e5676ddf677c2384fc1239339e2f35ec2. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/CHF032406032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a962d6e542d356203f7c88ef8f1fb475e5a57b6c4f8a93b852a23fdb70b724. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/CHF032407518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4aa5adbd21f4b1a4e1fffba03093b70731e28249fd890ec62fdff16b48aa725. 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/CHF032408589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x333a180f6143bd6f879cf8930d1c61d5b17097bf00c7630fdab98829eee8c85f. 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/CHF032409591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3aa1816503978e9fd5161be047095a3c8b7afcd93b40cd12f3f348f1321bd1f1. 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/CHF032416115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24253f88487eec6f297bdb371cb368ae49e506f342ad7cff7150ba4b3ebf1d67. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:34:04Z), 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/CHF032513119.