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 0xf05f7d1fdf177789e0f9d5aec74ffcdec0f14ac89b11c11e2b88273b1d76f787. 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/fd184cc3-b63f-4198-b7cd-3e9f087dc89c.json and https://artists.proofprofile.net/proofs/artist/fd184cc3-b63f-4198-b7cd-3e9f087dc89c.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 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 0x6668bd83bcaa300b98e372b5e81d102b503d3410ca8ff721ef2c627aa68a6684. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:29Z), 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/QZES72187175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a6897a55e31b299f89e5edb6fb77de468ef2ddfc0a7f9a4b0bdfebca843e714. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZHNC2381785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76b64f842065f87cacd15f9f6d8cdfd3e17e9c73a4b269e04c594ddfc4598ad5. 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/QZTAW2302593.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x862ba157496276114e0daddfa7328f9c5938870515cb3f7f00fb5d328e442acd. 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/QZTBD2332355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1d1c90ddcc1030a942406d94e558953bc9db7cc4501baa8dc409fba30828bb. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTAT2460951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a9690a13c58e4731700d63b01740f119c70f7237978b0646f31f8100a94ab3b. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZTAT2497282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea49bca20bfcdde5cf6a1eb3dc447a98c361bf15926e61c0bc479c9d65d236a2. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/QZWFH2405247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf43226daa51ad50e6d06f761c79fa49cf285f3427e1a9822699efee1e03d64f. 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/QZZ7Q2458456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dbd6aa22df741ede72c4c4b4c2d148c86c4a0d155aaaf49268ea6a994432237. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/QZZ7S2446318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0dc988672572bcf20f4a98deded6307111f3e5728589f3fd262494d2a451fef. 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/QZDA42541566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x113626c60f5130a3c8fe2c8906a0cf6c259876d21202e7914bc17f7c8982c46c. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/QZDA42541573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe014258e87386acd04fb1dd667160838e089ca0edc2e2b600362aadee469f24c. 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/QZMEN2559059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd80f074e8b2342fb97cace66d95d5909be36d050155f43403e2d7a37a7e00. 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/QZTB72392021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fbe87ad0cacde5996dc5959b0c755b69ed9de59a3909db6a94c20901fdc36a6. 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/QZK6K2456766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04bd80f074e8b2342fb97cace66d95d5909be36d050155f43403e2d7a37a7e00. 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/QZTB72392021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1fde6ed9ed893ddf1afb3c0fe01c2f9c3ff8a4a6d7df0516b1423900afd148. 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/QZMHM2332177.