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 0x796108bde4c4859c0dc2b1f290425778af09eb8bd53e6dbef73b1fc18e0527ae. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fa11f374-5642-4f7a-ba3b-4014f2c831cf.json and https://artists.proofprofile.net/proofs/artist/fa11f374-5642-4f7a-ba3b-4014f2c831cf.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 0x2043ff025ba10653624710f4d72262f55af08c76da37d54d3840cea8abba0eed. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/TCAFA2069723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eb3c0c38194927f80f44228af64395383b4dbb170ce14cf00d0fe54b7791eb4. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFA2069738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa293fe214cef232b552ed93aa8efca9e45df07d6b80361e3fd512a710acad2d5. 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/TCAFA2069743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54e17a086b1510f808475b55d55b0def6c2cf0afbddb9b04200ece2def775ccd. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/TCAFA2069750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf044fc9413f3b3d17562a902c7a703605a6e3f13226ffd6c212ffbc9671695. 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/TCAFA2069772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe494dbb31516c8b8a6bfd24a2998790afe17d90f8b1436c77996db8730b9e24a. 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/TCAEZ2097123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2fd175c2b070729d07433192f78ea2578dde9450d40ce387c9ab90935de488. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/TCAEZ2097127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b9bc0ec6e3da7eb05f804004bd2f5cc28de4e5a2eb57a7d9d8c7a0e7b73e00. Chain 2 (Bitcoin): anchored in block 956620 (2026-07-04T07:11:13Z), 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/TCAEZ2097152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3968d24258dea1248c4a9092a5549cbf037416794fa2cd04155547eea2677ae3. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/TCAFA2078843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc02fd643a672185cc54dd509e796c7a39ae6d8927902f675a8a7156387ca9e. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCAFA2078846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8aa4cc5cf15a1b79db47ca283bfe15b5b0e722d176a5aa5f6a854a0176484001. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAFA2078849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14c0be9d4e897e8fdbd5ad5d67de24ab9e86a5d69ecf4beecc3e39d45338fa98. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/TCAII2400113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x141f6a2129ecde36ade404b97b5974c1b9c3a996be30503754245fda0c7f8464. Chain 2 (Bitcoin): anchored in block 958963 (2026-07-21T04:02:02Z), 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/TCAIJ2400572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f9234c965e33c8a67f2b1941d70582d9ece8ac5494cbc5034d20c6579e01638. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/TCAIJ2400584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x078014cfd93c9a617d9b26a74793249334ed8b91c6130cbe84517db1e020ea29. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAII2400596.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0854582ebe657238c0a6dbf1145b0ee260861cac795799885f086bd76d00fd44. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T04:11:37Z), 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/TCAIJ2400634.