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 0xff51795a4ce4d650b6e969ec909df7ef54028b63427cb892c3f31a36f0abf959. Chain 2 (Bitcoin): anchored in block 953742 (2026-06-15T04:47:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8fd5b181-0cbe-43b7-8d49-a258a5aa3cf8.json and https://artists.proofprofile.net/proofs/artist/8fd5b181-0cbe-43b7-8d49-a258a5aa3cf8.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 0x14ed10529c6346c8f38d95a08aa6769e43a3f1ca16d7f67e3205c09c98120066. 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/BR5RQ2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2d0690fa8805668bfe4331cb3a85bba5df2621ec103698a6886a77368a055ea. 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/BX15S2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d6935e52a130a2b2751d9164dc7a34f44b0f515b000cf178c3987378e0b09b. 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/BX15S2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28c31c566664370739da4932e274232cff3063ec18c96cbcfafee0e856727b42. 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/BX15S2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2497dabed2f63bcf417d2b37832d4f0daa9a9ee5ac2de9120bba4206767494b7. 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/BX15S2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7964c7ba89acb7f51c7a42f5627cc2687745beca6763eee31ac5d42da899630d. 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/BX15S2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e05585d229d7d6e15435fff4e782ed3fcf2be50a3aaeeee442cce77bfde783. 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/BX15S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29014411a5e63303f26cef53572e747e32b7bad41e71ccf97b49ecdfb3a5c1bc. 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/BX15S2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15eb437f78822da4705322865ef56a5a85ddd258ee87de4aefb0e551516b5050. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/BX15S2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63bb108760ae5641f177fa2974b2b4de7769244ed2c17ae3dda487d33adc9969. 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/BX15S2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad8d0cf359012c74bb0f5ffdc4e67d12f840006d679480c5719b8e0b47afda3d. 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/BXNOS2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3bdc1587882c50a1d4e6ae6d8db8692e7f93fe4732be6919a09d5f3b91f80cb. 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/BXNOS2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad397dc885ef5d513a6fc9d85e00d9f5417a3c0e6b00cd13964b9c35f134948. 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/BXNOS2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32451674bac2ec5cd6577f7108db50d0dbe549aa5c1b7bc365232cfb3b90326c. 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/BXNOS2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1e05585d229d7d6e15435fff4e782ed3fcf2be50a3aaeeee442cce77bfde783. 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/BX15S2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe45f64ac1215c43dcd9b7a9bfdede13efe6b55b5b45b8f99df4f0ce5585cd92a. 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/BCBL92100603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f5651a21be1602ce6f79b4c240a13e21630da65e83880f97667df1359411276. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/BX15S2400010.
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 0xa6a3335b167069243b384dcc0c4809b9709572e6bf509070daa2f7e441c47687. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/BX15S2300006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c7bf301e4c88ebf176b20ef4ca601faaa4276f7db47662756efec45beeae92. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/BXNOS2100002.