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 0xb50c1c7188738c8f773b85ee8f7881b20b64e3f7d583774fefe4a7405b615eec. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5665bbc-cb4f-4303-9465-2370ef157b23.json and https://artists.proofprofile.net/proofs/artist/d5665bbc-cb4f-4303-9465-2370ef157b23.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 0x6da64ef95756931a31caff3a27e47b1f2b92e250b55e43baaecad9936b101b83. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZNWT2406207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdee78919f844dc8f43c8386c9fa1a1f068f3b36c99498a3a85fddd26e4d52d08. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZNWS2467797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30826dc666b17beca17ee743311540177291d8eb5751d65061e6571bea86853. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZNWT2411948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa70b81b2a1e77d18beeba50e9bf4e3cabed4a9acb2174ac9d466ec29c3bab20c. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QZRP52478684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75270d9ddf527b544e872332c80667f6c49fce8425f926c38429712a09a41d66. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZTB92470719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3892d5d70af12e17881aef8d4d1759ca93e4a74d1bc30565bd8a7dcbe569791. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZWFH2454428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a365d982692d35f06f961c51a8bd956e8a2c12c7e0729e18395fe32692a2a5. 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/QZZ792437132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e0582ed2296de45c81920fcecba8dab36dc4c119a7120ae3752826dad9e16d. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:34:40Z), 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/QZZ7U2488123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf075877ea34c5e762a337864cbc672c1baefea1a2c6831d095160f4d304d1209. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZFZ22584432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x246aaa9ae215048720c0687bf65439db7348070037cd4e950d0a0725a39b0704. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/QZWFR2584741.