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 0x4b9baec3b00eb37795633e778b6640ee43d3e942e517fd43492c81b4a0707bb0. 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/1627c2d4-5e93-415a-bf1b-8561ffaddf07.json and https://artists.proofprofile.net/proofs/artist/1627c2d4-5e93-415a-bf1b-8561ffaddf07.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 0x4f68708d40744270a5284874f3156da287ac9d22216a1b6318f45e7a2426b7d7. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/TCJPK2046420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01309fe1c189ccb4879425871c3eba19c3e73bd42218a07c43a532d34e7827c. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPK2046407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf710e82de88bfa6e7105768404e4af1df3b165229da31f0109b4593913829cff. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T22:42:45Z), 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/TCJPK2046416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82979e3096a4cc66f521f1abd18b65b3399434afc3b5612fbd97eb210ece9b88. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCJPK2046412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x515e5bf1fb4258a18c9495653e588f1f5fb50f0f7fdf7b4b5e6c72e251630edd. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/TCJPM2040307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da14fb555987c6cfccad08b590bf0eaddaef426fe0f7795b511d78e6d26220a. 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/TCJPM2040311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51fa6a8fffb73c0830c305e698dc355ec10ee7999834ed10a5091dc1567d2a22. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/TCJPM2040312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x434d22823ed4a0c2acc72228c0d85eb1ed9dffb1f8cc527211b767efdbaf6994. 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/TCJPL2095054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf5c53213e3ef7eb6862e1f48f61aef709ced966da0491716de96d26c5d509f5. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/TCJPM2057139.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03588583aebcf01d0172eb16c9cd80bdba2d2bacd658cf2747042c469aec9753. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/TCJPN2002757.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a4be56cd5406108ba844b73352f637ea4dca923599100f977696f4450e456. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/TCJPQ2134822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb1a4be56cd5406108ba844b73352f637ea4dca923599100f977696f4450e456. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCJPQ2134822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x627d988bf40130108c4e937bc2e177c836135403e05237e72bdfba66429380c7. 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/JPPC02312796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3300333f2e80af6902be958f4c1900324f7c986bd7ad66865958e6dfa93c77dc. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCJPE2524462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06974fe6deda0127726d75ec43e534aac3c283bacbc6ba0f99ec6c1b11c98b35. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/JP92N2528923.