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 0xce493412ef789926aa14b162a36501f3e31858cea31775589901c586db5ceb8c. 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/a03a9406-692b-4a8a-889a-1b4371351d46.json and https://artists.proofprofile.net/proofs/artist/a03a9406-692b-4a8a-889a-1b4371351d46.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 0x70afd70baec07ff84e64c376da25ed2d28cdbeccd28e46d98b45296cc066734d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZDFP2019207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1c7eb2434dcdb549caeef51149dcf35041a5c32261532bf101442db7c934e80. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDFP2019208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0e1a51231277c084732e07df4edbae4100f18984e005d02d2dadcdb3286cfb6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDFP2019210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a550d8107b8f5790642f02f2381a046912e5eff0b657a9b2d9a58dd1611ea47. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZDFP2019211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ba509ef9b7fdaa2e3f9ae8c2f8a1e31038f3185970b3ef6dbbdc45d9674c027. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZDFP2019212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe79a432a37f5350b78f76477d7bc2801c325a854ea3c651e6966554f8f44a229. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDFP2019213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fb37fc77b61a1ce9ca390549dba0ee96cf6310bb24abfd89099c63b34f87c9. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZDFP2019214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4131530b385f3a3752ff74065643a8f092e65b7d60eb3051059b9c2aba2ea99c. Chain 2 (Bitcoin): anchored in block 960241 (2026-07-30T09:58:01Z), 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/QZDFP2019206.
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 0x18a0f3803fc12dfbef315b7b46b3792378808e28cebd44264f402f6e83c30fd7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZDFP2019209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x987db9196d2a58157d236027172bae26e5964f6d707b16ff460202d3d3662f2c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZDFP2019215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dfbe4defc6c7bad7065c2848c8655a7ea2ba4a89bb808fe1aa4de03a97352f6. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDFP1989454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x622e975c5038cd612da89af73404bf3a5215234af2464c8af0a2926c37412416. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZDFP1989456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde44c8d29818b643e00d88df05ebd4755457bcd5f5f38658eb2f0a237a4455a7. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZDFP1989448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65af81e6dafd94f56a1402467736bdd12ae1b75b5b8f992f4a1aa8facb70b3f7. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/QZDFP1989450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe165a93117d6e9ddf106e9a48004f7ce61f5b723d71500308794dbc19dba1cd8. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZDFP1989451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3d86d288add09693c5244c5764c590a32e587d5128d614e5dc79fba6fd1b16. Chain 2 (Bitcoin): anchored in block 960259 (2026-07-30T12:51:24Z), 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/QZDFP1989455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb4b9a9755c6674d187a660c4a370e543e9f57f09c52859b68f9318f7be7574a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNWZ2400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379deda6fdaa0d043b9839377fc68bd6262ffca84a73375f3196d33161e49015. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/QZMEP2461754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2efcc4d5a667b7e107944d7a764f1931409214d0808c9d2c329804c2389284f9. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZMEP2461755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a7e415aba5d160b2bf52e9a948748c6361c8c32781087df9e00feec85084fc4. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/QZMEP2461756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4dcac7b663bf10fe769125d735feb2410d260170e7c26b9134c3cae4030e0fb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZES92428367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf7756aa055d268a005d3bd9b5dbcc5e04ae1717ff514a0535a8e2fe8468396. 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/QZNWW2306674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x858fa6e24f78c81d78efaca1afcff6920e8478f5473b91db0782c50d7f439f1f. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/ZBO4F2300014.