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 0xfc878347e61b1647bc7d1aa0924ab0e264487e47b7dd9edde69ba388755be7a0. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6f398d13-29ff-43cc-b3f6-000e0b2b830e.json and https://artists.proofprofile.net/proofs/artist/6f398d13-29ff-43cc-b3f6-000e0b2b830e.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 0xd6d6579ba41fd37264323f34a8adbfc0a2ecbcead6993538087bb3bcfd9e6ef0. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEWM92111411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2251c29a9802a19207756ec4dc2dd4cacb56c4d9fe472bc03af73ebd8a4faf68. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/DEWM92111412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc645a7e88a919ce97c96212e888ff46f5d8ddd1e13444af7ab0f9d4ae5b1c834. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEWM92111413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1384c7197219dff04398a466e9b2f4a2744075bfbcdf7616117b4aba5b638637. 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/DEWM92111414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb86300350beddc1a7838ae1f0da721b01e35150c2408f5cef090322baf33eb8. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEWM92111415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a6e490366fe05087d5d07fa87260e74923a8c00a9a88e7b768e7890810cbe90. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/DEWM92111416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5fad066ce387956e674ad2068f732232d16260d7df306bc2d3c9be02c886c2. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEWM92111417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4790e501729bbe9fa0c1a6d43868ae2cf80d828ef545de318f7061e77b5ec69d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEWM92111418.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb116416129742970beeddc78a3ca679b9b8b7e4a303aa95d001a504d40b93bf. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DEWM92111419.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37c4e2c9c598090530c8bdff16958b391924126181c4ae80c267e87dd92c5529. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/DEWM92111420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aa4e4363116fb2dcd9088e44ee5b7b8e63a035c7268bbf7bc94ad8c81856e7. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEWM92111421.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13461d4ca4c31e66037cbed959a6d2501144d4494d65a7ae271fc28d1146a853. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEWM92111422.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088eec3693a5d9e89085d8c8091019c03bb374b5e53a9b28d25999d99193a745. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/DEWM92111423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d3d835772a78ed34e9caa7a50d86c48aa2f7bd466cae9866d0f20b02a62f747. Chain 2 (Bitcoin): anchored in block 958975 (2026-07-21T06:12:52Z), 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/DEWM92111424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb628374cf764ca764b7c672a29e315aa83d2063751fda419a02d22ccd3b2a5c5. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEWM92111425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05bc51564509bd969dd37616d6769b9148da3f41a6515f9181a3203d8cc2d765. 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/DEWM92111426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fe7044f9265036270032b2c890f3187109ca2c05519e752315bba174af214a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEWM92111427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d4ea65750141173831d3701356712d3c4ef1e0d4d4aaf6834e47679931e4db. 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/DEWM92111428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77ec0df357ac4dbf331e3b199de6d55e5043308c54ebea3ebb6851272106c431. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DEWM92111429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d0e4d36f3536e8b94b9214c556fc119d5464904dc34b4fcdf81c096ef266387. 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/DEWM92111430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fb0279aa94d0a123656d48bfd8fce4ea0cb8a94b11dea9015a9f0bedf1eea6b. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DEWM92111431.