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 0x41f201c5d6c79d435c47657a431eec8a1873c6606c95b21220867bad3e3205d8. Chain 2 (Bitcoin): anchored in block 953727 (2026-06-15T02:33:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8ff523ab-3a50-4a1d-801d-0aace7b57fcf.json and https://artists.proofprofile.net/proofs/artist/8ff523ab-3a50-4a1d-801d-0aace7b57fcf.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 0x00daadff3878f38aefdef2ea6c1f2432a0c4945ab4b86160c2ca6b728c251186. 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/GBMJG2305308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234ed6ffd0101b742ab29a6827eeee2e99ba97caabe9a4a018cf308c8f1dcabf. 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/GBMJG2305838.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e805fdc78f629eaf6b8ec39359261aed34d47f110a9e641ac8c3c900efb4f8c. 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/SE6QE2341272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8820ad52b6dfbd2a0beb105835495691e9c7c713429a052ebe590fbfc24ebff4. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6QE2341097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc252d68a43b74183658e76f2f2136064ae1fb5c39b23a69fde6e69179becc30. 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/SE6QE2341199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74e78896da6a26e02c976c5a252cf1b82883167f986ae392d30ec20f5494c96c. 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/SE6QE2342752.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8449f79e74ef32d83278dbf61b6bd533b8abf29eea772ad0717d68141961cfae. 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/SE6QE2343616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x826b0d5231dd9521b60ea9ab7d6314c1e1ab8c573c2eea58104f18495a34d83c. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/SE6QE2343595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfca3df15cdaa814b65ddbb4a51d989b4dd67a6c2b232bbebc2be87c487940958. Chain 2 (Bitcoin): anchored in block 957554 (2026-07-11T10:39:45Z), 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/SE6QE2343359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca0d725d5a7b7c910165e17481491a433dbd16d4d1112d2f772d47d2254eff66. 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/SE6QE2342978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e6cabdd8754af5062a3624dd216191b5b9e7641aaa4a918745180dbb629f0a. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/SE6QE2343563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65a3b0a1f9d568cff3c9c90bdf19fab87598fa2c9bcc2b7a8fee1682a797f9d2. Chain 2 (Bitcoin): anchored in block 958756 (2026-07-19T16:12:29Z), 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/SE6QE2343565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2edb3866810f853e54116c297f88071a94fa162ddf5bc90ad87af9720a98223. 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/SE6QE2343564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26e14988ac358b8c039fb61ff5561f353ad2a4513a864a62da9e9584770a4831. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SE6QE2343272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3a73c524e0c90b66b4bb5ee8a272def974763502b4ba057261c3be180175ec. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/SE6QE2342817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d3d9f413044fc8667d0032da9d0ef8c09f72e4336cba6c603f02edbf04df5f. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/SE6QE2342974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ae101c0dbf76945db08ce9c5a3d05058cd3e814efd5011195784c597f01568a. Chain 2 (Bitcoin): anchored in block 958054 (2026-07-14T19:33:24Z), 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/SE6QE2343352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46597cdbdb948469f2b0f39a535bc66849e35f5dbe0fa95fceb9914ce9cd4de6. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/SE6QE2342821.