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 0xa4fdf76c154a4f79013aa53d8abd73b7067e8c5a69be74a4c322b278f418c3f2. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5ba5b4e-8f4b-405f-af37-8549e6788914.json and https://artists.proofprofile.net/proofs/artist/a5ba5b4e-8f4b-405f-af37-8549e6788914.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 0x2d10ba36293ba6afc540765393b8b5be1103b192b44e2b2e5b9035dd0efd2932. 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/NOEPG2212010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f7bfe9b36bc49553e4ee2196c4084b07b1effa4c427aac4fe4c39686af0fff. 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/NOEPG2212020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e80098ee2a554cec21c526eaa213e71fd81b9c29e0ccfc2bf2282497ff1eaae. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOEPG2212030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35284be3711f163c3514b7c021555d811c213a22cb9ea3bdef91eecd8c4ff327. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NOEPG2212040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfc2652708099fae66b50bfaa31234a745c8739e1454b708ed02663c08389f99. 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/NOEPG2212050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0c6acf3954a020eba1c4f6329085ad22b16f67e2cdaf58d56a564c7bde7c171. 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/NOEPG2211010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2781f8cd8f8971a5091d3eb3bfd63fd50bf113c2863574f36282c5bdfdf60045. 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/NO28R2416103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40495dbc46c7f605e6a757d9f789af3110faf6875e38a2a1230f20ea9e39fab7. 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/NO28R2416102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91268e66c737c6e4180eae670ab6b818f72fb4a91185859deda283e2c55d2eb. 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/SE6IX2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28568a6da5a30338abcd240b36f6776bb518a12006cd04db3f0ff9638b542fec. 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/SE6IX2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936687eb9d6a1a9e3f892a78ed9e3590f1745ded7c12166ee93578959a9b6a6. 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/SE6IX2300301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa87c62f4047b8c3df6c209e8f0dba270a987031086f783e0c8a72fd934a52254. 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/SE6IX2300302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b68e647bbe27d7d62a6f81ff3ebbc3c5121a791d3a6e8526757c23525259326. 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/SE6IX2300303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d1a82d2c66fb496279aeaa4e273ce6dcc8d7e03c30ba112efd007ccab8e2db3. 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/SE6IX2300304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9015b1e886a03b8e7e8a8404a597d5c1e64fc58fff19e30df01f55048161edb3. 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/SE6IX2300305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a41c8ebc49d40ce067bbdf157195d2a13e384eae3dd2107ff28308dbcbd186d. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:09:57Z), 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/SE6IX2300306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f726879d377629644ef4ff4860ea1d44a300f6edaf5ec57cc30462daa445d. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/SE6IX2300307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169b5943e3d4242ea5427b24609852d0cf5553abe8509b04e399e67f29024a9e. 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/NOGHH2170010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7d4fe10fa04febd652c2c0487be997a107d2446f1dd03a226f1ddb1b05cd95. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOGHH2170020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe82a6e8952d4c32911a21918d0c3ab2d5e369970860b4630fc6409a9d53b9a00. 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/NOGHH2170050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6769491c4e94a40dde925a183d31672692529a17aa0e4f808cd4d3f29b542b29. 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/NOGHH2170060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd91268e66c737c6e4180eae670ab6b818f72fb4a91185859deda283e2c55d2eb. 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/SE6IX2400402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28568a6da5a30338abcd240b36f6776bb518a12006cd04db3f0ff9638b542fec. 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/SE6IX2400301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9936687eb9d6a1a9e3f892a78ed9e3590f1745ded7c12166ee93578959a9b6a6. 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/SE6IX2300301.