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 0x8adffa4a3705b656b5f284bcab21a178e4c61dfed0c8e93965015cea9342c2fb. 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/d38c64f3-ef89-4bdb-8b8c-2225c9781f00.json and https://artists.proofprofile.net/proofs/artist/d38c64f3-ef89-4bdb-8b8c-2225c9781f00.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 0xea729a3826708284f08f7d7fba0d483ecd47fb15f7a90cdc3775d9b5b8f7680c. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QM6N22262007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcce684090f2899588d47ce3b7eb29adb85470bcc121472819a3ce7208df0ca5b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/USHM22027218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1f026a95aafd4a7c98e6605491b46229f0809452ec8c7a1808256113585536b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QMDA72213395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a69d578d151f0f0ab5c8b5beed2a8c561c6b026f5c72a1e8648c5631a1126a. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-21T21:30:34Z), 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/USWL12301595.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91136bf610a6eb715d788b7844dab33acca78251178ebfecf258daebe2a36861. 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/MXF152201388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd146d6442365285d7d8cc070bd9df71cf82802d88a939476e75725a535670ffa. 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/SGW502393509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bc9eda9c5e28dececc361c4c2f7ac05985169b378cba303f099a2070a361b52. 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/MXF152400344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5cb3956a6c8cdf4f43f2578e1be47d79070af874283d924059edd4c917c40c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QMFMF2433252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670108f9955d26edc3ef733c5ac6c8fa033f00ae7f3836354f11b8be1cb7d800. 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/QMDA72463567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33c71d92ac5f8399715ece8c438d2fc2fa2d0aa57fef0933d5337911d891a475. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/QZTBC2450101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088fcd0097c22ad18fb883cb29cc1d910d985fddccf78c4ddd0e90a88f596e72. 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/QM6MZ2425008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ba044748a1f68f38ae392c04f64d88d638265ef73fa78693fef6ae4eea5652d. 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/MXF152300642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f8fa1f35f3005ff8d9a5088272edd1468f11b561fc93a9f9a09f60e773e1dd0. 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/QMDA62226618.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2986c5b79164831a62ca845aa28958ef23f99e7bc67b7357434a460bc6f72113. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QMBZ92250629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0cd32d2117db23b068f594f7cfbc6b7f51848e63e20618ae014ebb21651895. 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/QM4TW2175643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d913b07cd1ac2e0a75fe6bda40edca0183d69b6acad0b1b972b563bcf8ef83a. 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/QZMEP2417585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23eb3f8b769ccd3e0fac7a3f8c4e14113229707943cfab825cb6cfaa9f43e9e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SGB502407788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eb00fd4199e45819591dc48dd93520304c9dc68137bd50d00e28a12bb3dfd42. 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/MXF152301278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfac27cf00123cd38030dd3f96f39e772c42df068542f846d5b3837b608f509b4. 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/MXF152300627.