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 0x920b473e5ea0c7d29c684e2c125bca518862496535754f784360724919493b99. 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/b8650efe-0f77-4fd4-8570-ffab95c99565.json and https://artists.proofprofile.net/proofs/artist/b8650efe-0f77-4fd4-8570-ffab95c99565.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 0x3120db8f734db6edfb9b78f9ffda509a05097756f8e44a52d68616a67736e630. 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/QZ5AB2356802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24aa8908dc140139d397ff2b171900145bce6dfe7dd173169b5308c3434866dd. 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/QZ5AB2356808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44811087584bafa4f1b6139a6163c62fac329454c736fab487ebb4610731f468. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:55:43Z), 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/QZ5AB2356809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16adc7c0bde745480411f936192db06a9297306a06a69b644e08f382c6eeec9. 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/QZ5AB2356810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e985bf3a1e2a30cbb08894bade22de3d218b05f5c58065ac02b13374ff5de4a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZ5AB2356811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x365b3f64bcad7bd8c98b5dcb005d986e436407fd2d13d55d477262e4a8ff4e94. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/QZ5AB2356812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97160dfc33f58007b8d7486f54a8236aeb70a8c1c869b4fcf311f1947e7a212a. 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/QZ5AB2356814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9530f69b6939ba5baf28042927d060ad9631b0263719efc3d9c45d5232a6157. 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/QZ5AB2356816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf461ad4ad3a80d98e3d91ef6d23e1d3e78af5ca37eb0d5271e5047f65e9b6a. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZNJX2323207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d7f48c39a1af8a9714ffa4b60707cf441ca760fa608d3ca90a79cfe6052276. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZNJX2323208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7faa98348c16be1afb7177ebf92da71c82a93578e4076776830b5dc7ccbe126d. 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/QZNJX2323210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dfae41376abd05b86fdc19b865a480c9bd759f0d60eadf516f66a38b1f90ea6. 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/QZNJX2323211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ca139fdcc2d73502ea236b5da921ea6ec5c3cedb9b80e1fe9bb626517ef502. 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/QZNJX2323212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c8264c8fd2d9a9edd40bc7de9ca5a4f98a5a0ad993f7ea48acb5c2be0599b6. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:44:03Z), 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/QZNJX2323214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x346fc98aeb9e2780046e1effe1e95b8201ef575e760b8802ace06b9e1c4656be. Chain 2 (Bitcoin): anchored in block 958945 (2026-07-21T02:01:16Z), 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/QZNJX2323215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c0188086b3e57479e92d8bf98a8b31eacc3416c09ded7d0ab71f76f831c79. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZNJX2323217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721a13a15643889894b872aa2e6782c6cdccd85fa7e54bfc68914499c3645799. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZGLM2499996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb582c4c856bd5a64c1b289bcd8af455c1808eea9914da4514f7aca616a654c36. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZGLS2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1c5cde0060e8786004f510f03f3c23885813a196c8bab4431029cde8f33667. 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/QZGLS2400082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efc94032e24e69feaa462a9933519ffd3a18e683008ef3cc51e3cb32a11c833. Chain 2 (Bitcoin): anchored in block 957595 (2026-07-11T18:26:17Z), 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/QZGLM2499925.