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 0xcd4b10e650c80271a3944d3a965e24d8e4a2c3c59801412d6de1196bea77bac7. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/73afd2f1-daae-4d5a-aa39-e6ee7abecad2.json and https://artists.proofprofile.net/proofs/artist/73afd2f1-daae-4d5a-aa39-e6ee7abecad2.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 0x441e15b5e8c559e3a2d9c0ca0cc37b45910c03a080487b34fde793cf7cac6334. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWW2078815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03196e5e4b3169a46ecc8479717322d51efd99daefaecad3f201660987ddc301. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USDY41840723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa25e550ae7478ab6eccd688bdd48da0f9d0e25068d6374d34571c26fde6e1a2a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41840724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72cfbc2144ec4a7db96fd2e4d600ce03bb549fdf1b173b64f7b434f2b5185da4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41840726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4a9f058f9a566a4ae6d0eaf942166fb0359b968fa319def8791c3c97aa7d01e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41840727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad5c6b075b3aa09d367e628600c9b603dfb55a440f1310626f6da13ab58acbb4. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/USDY41840728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16286c8696ed38aab7a6b85045b9649208d3033c06e7c93e36d9dafe540c02cc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USDY41840729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f0277af9388027689be501d91031b3ac7a7d8575e2cfaa317a7b92d8c9ffe38. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USDY41840735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0512199110c93cc605134ba42c2f459b483aab5c8277563552fe847c561807b0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2003702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9cf55574ec1395b865e388cf97a76c5330fca69fcbe20b17d756e661cd9f7. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWV2003704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5cdea35a4c4555f8fe648f54fe5112ac144e32da387751dd3e0516bd0a1e6c. 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/QZNWV2003706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202a47aca0194fba154e343d2f0cfa40b1346d0082383e5b9cb31601e60de8ab. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZNWV2003707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b79360884b347517a43082e0f2e5d4fa7a6bff6f433b266be6efdc628f8ae0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2003708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd148a5206adda880962cc973eb61ddc148843e44d648bea1dd160257b1c5fc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b325c9f2111f8db6fdf475f98c4cf4fdd7e3092326ecd5d03b73b4fb40bfcac. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2003712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877b3cdfa8a775ad4a1c1654a8427082f1647b19c79dc750488685071b53d497. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWV2003713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0c6d52f739243b4533811a97128e3fcb29f1f8e96bbc0b986844adea986b04d. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2003714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510cb260cb640d960010302c5aa1f632ffcd562c8b1c0c38dfa999bb8ebeb414. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWV2003715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331500953d8d548aab868978c77d0549b9b934dc088a4fb9fcba26d38d4152c9. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2078810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c7a0e9d85b2a41dcf6f769ac9dab5214432393e3c6894dc1cd039e1686f7b9e. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWW2078814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441e15b5e8c559e3a2d9c0ca0cc37b45910c03a080487b34fde793cf7cac6334. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZNWW2078815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0512199110c93cc605134ba42c2f459b483aab5c8277563552fe847c561807b0. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2003702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fb9cf55574ec1395b865e388cf97a76c5330fca69fcbe20b17d756e661cd9f7. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/QZNWV2003704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d5cdea35a4c4555f8fe648f54fe5112ac144e32da387751dd3e0516bd0a1e6c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/QZNWV2003706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202a47aca0194fba154e343d2f0cfa40b1346d0082383e5b9cb31601e60de8ab. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZNWV2003707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdd148a5206adda880962cc973eb61ddc148843e44d648bea1dd160257b1c5fc. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QZNWV2003711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x877b3cdfa8a775ad4a1c1654a8427082f1647b19c79dc750488685071b53d497. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZNWV2003713.