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 0x4b66cdea2c0b2138eb88307b0993754af5645315d47154628f0a81d6dbdac340. Chain 2 (Bitcoin): anchored in block 953592 (2026-06-14T05:36:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0476f72d-4a6a-4ee3-b63e-3c7a2ceec675.json and https://artists.proofprofile.net/proofs/artist/0476f72d-4a6a-4ee3-b63e-3c7a2ceec675.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 0x9284f5885cfac28fed4a576dc32e2ddf5acbad222c6b3c5a640b0f2fe76ca3c1. Chain 2 (Bitcoin): anchored in block 958111 (2026-07-15T06:58:20Z), 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/QZDA42279264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec40f1f5e7ae0b5be794d53a070e7d4a3deca88217fe003640ea0e8dae892d. 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/QZDA42279265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d66038b5069daba199c49f21b9121836d9d1ff35ed2cb59f629ac2f2541793. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:26:12Z), 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/QZDA42279267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6612822c9b1c37dcb5844b15b8374c6f0df076c3e17e2c755fa1edc0d1e8ccc5. 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/QZDA42279268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ba515f52e9302323b3e27d0421d9eab781dd6146820e6e6d7baab88c5cd3d0. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZDA42279269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6420678f7428548828deee73310ab87e6e33e5fa58a753c2da4b0be579e021fb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZDA42279271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a49b80301849b57d15c7c1f323813a17c794cb2cd5f8160f4fa7d2a86e7ccb1. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZDA42209484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x626b7e9d957212bc4d437325127da28544ebf07657430a54cfddf0a18ad7add3. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZDA42209486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e85d54e88bc538682e8742746801d47f3ce6d47e19a565b92e3692b3fe8f8cf. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA42209487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71145b6849639ab0630626422ff35f85e8d2397d14c974f7dfe843303a6d940d. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/QZHN82253498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc498ff4c871633c0d454a4a3a892731a7ba9b894f2be0f3e1b16c4a7d20a3a4c. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZK6H2245033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x195eadc8a36f05f2f6bd200dc95183b247e00fa8c1cbbdf5ce88d886b06adbfe. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZFZ32371735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc62cd266942be1261febca3ad6252d1d813e672b559d05eaee0e1c160f71a8dd. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZTAS2334413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ec493c4559c8037e0f985707168902e369ac43d34b40236862547db9aee2f9. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZPLS2472347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b684a12d21253a9647e4c71a7dfc0a8b057d68d99040f25601ceaf323cda7fe. 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/QZK6H2550313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe046d18921771f0723b0cd8596f7f4d7bc06058ff03cf85d80402b00c627c1ae. 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/QZTBD2545884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa14a05c8dd156db23ced3bf8324456e7158308e033407d97d9bafe1614f88113. 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/QZTBD2545885.