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 0x4f35bad4949ed53a5712ebf1dbcb4dfd3a2548a05d5fd9fe6b5c47d91772dac9. 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/03265110-d5d8-4866-9783-5188f8d3b01d.json and https://artists.proofprofile.net/proofs/artist/03265110-d5d8-4866-9783-5188f8d3b01d.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 0x2c94723cf6061a0e7ddbd91b5037a548b702ff0ba542abd5a3a16ecc41249bdd. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZDA72086505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b56dc668ca53e1fabab9411a18f0bcc676e6efbf699b2bcfc1f8f667b04dc74. 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/QZDA72086508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce93dad11bcfa8d3cb79248a6a80e21ce4163aafb1caf725a4438f0b759a6a26. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZDA72086509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c458c6b5d17924e198760b68604696bad45eb6404d088a4c5567555dc59852. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZDA72086510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa88c0b1fed789c77a2273067e8f03a61ea3573a612ec849bb7c46c95bc4cd9. Chain 2 (Bitcoin): anchored in block 957735 (2026-07-12T17:47:43Z), 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/QZK6H2065718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb52b0a8ffd9892bb965f07a10c2ae6c6b03f34ce402da62e3d271e7dc8ccf8. 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/QZNWX2008794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7678df00e5b75f4a2536779a8ce2a37d16d25e26259d45ecf233f50e18a92b9. 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/QZFYW2123647.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e21425d1e45c38c48d330fa9fd65c7425993105345a1d4fa6c674dd01c62c46. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZFZ32185776.
Get Me Outta Here (Random Horror Version)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ababe965e684a046e5ee1e98afb577bbfa4f62ca267643dbb1d9bff33bc2441. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), 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/QZNWR2174766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd52609ce970cc6b321197e7f3cf31824cbb09992a6a70f988d75bef801afefe. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZRP42132751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x499ca6fde7eada1f7ba4297f56578693ef3d4d5ecb6b48c8c0a88c4756e34c69. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZK6H2231871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183d006092cdcac78380947891c2c650bdfafaa6baf320ea2f602480f3771aae. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/QZDA82363995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x166136487c4e3fcc8d49a6395db5d89081b0f026f11a43cf54bc51dd4a1b5d3f. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/QZMEM2337052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd376ac40662a4a67ecc1bfd79a6859890bc3669045c9b017aed9b3f7e9cf047. 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/QZWFM2584687.