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 0x201c8a18dedcf4c0421916b107f79357de9d2b3703af28d3ee3509bfa7994578. Chain 2 (Bitcoin): anchored in block 954065 (2026-06-17T08:10:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/39f55347-3f1c-4781-9e19-52f0d2be66f9.json and https://artists.proofprofile.net/proofs/artist/39f55347-3f1c-4781-9e19-52f0d2be66f9.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 0x7e448070e8ba5264e579dbf0a6a68bd2f173cab5f772b5de41a735ee23ac5fcd. 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/FR6V80930874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d8c6ac0eb9e1453109c6e44c55e24a85e150ec8e297b9bf14b28ba280957ab8. 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/FR6V80930881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2731dbcf8997b2b70c41b2dee6167d496739ab5e03593cd4764b302f6fe2c022. 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/FR6V80930897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01314efe8288d1ddb79827bdf5203d67d49dfd213bb7ddd5ef821cde35deb2a4. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/FR6V80930877.
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 0x07d968a3dd638466d22a432d28fc6713fc55fc0f7ee6f6295620eed90243d973. 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/FR59R1715675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6a21c2e6477257b90fa8a4a188d8a875b49a4adccbae25300b09fce34cc8644. 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/FR6V82325935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794e7afc44b164624848f35d75c7d4e6f3064d9c6453cc0bee1ec6f68250c3d6. 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/FR6V82325936.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9cbe9fa007781552f5c1fa46005b8fa6b5f5c4b4023759da44094dc332084d8. 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/FR6V82325940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1fe912672f51a4e1044f7d77e97bd7003ba229192f8554c7e50ca4bfb9a5d2e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR6V82325944.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7251a6840f82a83243b1aff3633651221d779ae43b662966fd6b0124d2c1ffd0. 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/FRW511500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632b2144fa68f8c30f7a454a4cc62033a0376ec116373f8d940e003f00b27a3a. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/FRW511500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7716a47aec0a79b554be06c86200d21f2d233f675e47f002f54587c878392440. 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/FR82S1800270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x099d2fe8d538794707011f06af3c917dea96a4d7273d2978327828d700681820. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/FR82S1800267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32b72f85be96f4fde53bfe2eaf229f03fbdf6803bd4e3d0a2f92f132d700902f. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/FR82S1800268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35aac647a5a536d01f26ab4417ed1003b292d233edd11cd2045ac7714eb18697. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/FR82S1800275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeacfce46aacedee46ef6d7cb27f0390a5c5b116a16db049b81a7c7839dd8b75. 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/FRW510500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45cd8e7a7037f210375c4022100a05b7d9d3bc386791b076bb314f1c6fd24e1d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRW511300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d4ff8ed2b265ec18bdb7ca78d2fdf92a66f1c72a40b05c7bb2980def0ed07a4. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/FRW510400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa200b2e3c3cf52ab645e72fb38b66be7f4d82bfd555e83e71987d57c007dabbc. 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/FRW511100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9db0e23ec7e70bc7c1a4ccad4da8777168a96d6ff34876a2ab798c15b5ae70f. 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/FRW511100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3728b462e393e9377f2d0bd9d3df17f838732f057540bbcbbc00ea14cc09040. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/FRW511100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe161ab35d38c27f5b2df149253fbd1eaae1961f87e93d1d4b2a39b52f499a3de. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/FRW511100035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377caa8fd2602b0d3292dc9f65429c4b4b63ff634d4e40c7af8be2708132f731. 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/FRW511100039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02627ebebf67eb215b421a662d7199bacac906c31fed18e0f5eba770e36692de. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/FRW511100045.