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 0xe802d488c7dc5eb81f06c7099a238f278ef5e90dac02416b244af93a41346486. 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/e0c6373c-3067-4d38-9cc0-7ceefd9dc241.json and https://artists.proofprofile.net/proofs/artist/e0c6373c-3067-4d38-9cc0-7ceefd9dc241.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 0x54a3182081492cb6c5a90e944cdff2991c1c2e65c4b3a3b19ed73f573089877c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM81678399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde8c50d72ea026508cd926cc0a041db755fac4557730f5d1fc20981b18a9fdf. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/USHM81678401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f1ccf536d650268d19d9e63d3432a64f3d5ea8b9e7f7b4bd3cff3c909eea99. 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/USHM81678403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc217de3b31def971c9281407adcdecefbab67945d3a6f56e6c4a63f8ad045b77. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USHM81678405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fa9f75f66866b18b8376daf891825a26336f7d1cc648d2b045304fd1a3e881. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/USHM81678406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92c5fe50068d64b84a296fcadf4fba1eed0e777c561aaa3b1f0474159ac31bd4. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:43:59Z), 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/TCADL1821054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x201bcee8e61f864802c532154ca1720b752543d4847a1b562d652484616440ef. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCADL1821058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf494c16c5182c6a59df29d90d2c2f25a144ed0b4929cc4bbc31d90814ba8e84a. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCADL1821062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13b2e7c31b67fcf119ab6a5c46a5d43fa91e26e6a50611b6c0368158f72c87d. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/TCADL1821068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667bdc4f6957624084a060ded165ad651ebcab97cbfdc06db86d29de5cf89f96. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/TCAEG1998617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f02766ca41e0aac0928a7eeeaae0adb1afba7f544274f96d479fe347735e27. Chain 2 (Bitcoin): anchored in block 957745 (2026-07-12T19:20:20Z), 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/TCAEL1916546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94be0b8bfceb4ba949dfcf0d0cb6cd7138f2998b28d4fd51b634eda98e2f4fc1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAEL1916550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6c46e3a9ae7ca71ddc5559074175022eafe3029c820934032a6b711a7d142d. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T01:03:52Z), 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/TCAEL1916551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1dcff82b10bee5333d11e33857946f0b9c2faf2146d578d92fb32953a8075d7. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAEL1916553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe650ecc1f70bd633fdbb69d4163517cbb94765ce8ec8f7b3024dc0cb7995818c. Chain 2 (Bitcoin): anchored in block 958350 (2026-07-17T04:07:55Z), 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/TCAEL1916555.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc0e3dfc9b1c2afc66d7897bbcbfb44f2330917d93ac7f0d36a6b5049b63f4c9. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/TCAEL1916556.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a01065759e830e4c6286c9453810979ba526bc5f6fb975d65773c461395475. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:23:39Z), 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/TCAEL1916559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa0f1babf06c1d5decc21add2675aae4be3e75d61816912dd85cf7fc2b4a6da6. Chain 2 (Bitcoin): anchored in block 959076 (2026-07-21T23:41:40Z), 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/TCAEL1916561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6ccc6f492b8566ebd5c20e6e2aedb1d31c2e318847616f0d372b2dcd1eecb73. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHNB1948662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3b36e7a48be5d903637299edf3eb211e3775796da0a42955a245c1f96077672. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZHNB1963933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6c057dda8f39d10a6cf14bb02b755fab3167bbe180730e6712432f1a31c10e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USHTA2000577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef796bfb4b661a6a235cd6c8acae928d90d5c78dcb7518ea9c2d99d42afa0730. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6P2263263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd5356f4bf1d7a64630329cfa2ef8ca9f2032ad72074010ad7859f771b610a0d. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T12:58:09Z), 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/TCAGJ2287201.