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 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 0xe5e2fd5abeef22f2684c91fc4006d079196b9262ab832cc9bb5c95d2c7ccedcb. 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/e3879594-3a03-4eab-9e1e-1eb633d098a2.json and https://artists.proofprofile.net/proofs/artist/e3879594-3a03-4eab-9e1e-1eb633d098a2.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 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 0x79e3f5f7a67da216c8b45edee054a94418f205ad2ea095d7c73d112c65633721. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBKQU1965271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39c5bbb0be6faa6892c97e4c5e059406a3d2bf64d5abe8356373833cc4fa0af8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMEU32011126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13618f676b4c0cf50262975066e46e21fbb6bc789c7ffc128ad117f7795c6bfd. 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/QMEU32011133.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x588c9142a7b780ef90cb3d0abae877215880a17e20c5b490b174790bee9fb150. 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/ITF3A2100052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3149d978a8eae52b312e6ba641691a844ee42b5edbe15bf1d8515294f14f30c4. 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/QMFME2102912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aff7e34446d6b7a31dbaa6143742582940af3db7b02fbd47c16849fbc2ad3f. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/DEBE72100874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f629f0862aac8e54d18fe53bfca43238b4b0decb36078e4a61cf948b7818095. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/DEY472276519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7a1c9bcdd054dd4077db578349178b4538ad032922e34e24549e6dca5e21d6b. 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/DEY472276526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e82687c28439b5c9915dec2a403e73e36155d736dce40b63318752efda6f389. Chain 2 (Bitcoin): anchored in block 960387 (2026-07-31T10:06:30Z), 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/ZAC012300207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e2a2de52ef07565eec7897513d72b855f806c53e40b9d8d3d7eb94dd4110555. 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/ZAC012300209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x815069f66e178bdf205364e9be53e459c62a9e23ae2d17a2659b6480f0a4debc. 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/ZAC012300210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09b6a8fe09e62397f85bd68f6ab5450573a481bd316465ad4d94f4784f3f4a67. 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/ZAC012300211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217249384e820a3b1ed97a5163bb6edbdc8743c939008f0ab67c0b63fc474abe. 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/ZAC012301202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb1a1ca3660ba5ed7c7f47a4f3af3b6d3a35b7791b50a027c5c01d2fe7201b0d. 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/ZAC012400890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fcf628724c55f5622f8369b041a19e6e461d97bf8453359944bdfdbffc27dee. 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/ZAC012401034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ac8f2c39afe7721788bcabe573f5ebc4ed951d759ed7168e0cb672bb0c67cf1. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/DEY472480515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec4df07c79da0863dc07c68fba0f4a88f9a364aa56ee6575e0c0f6a2725672c3. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEY472574180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a867e740c281c06c78979a36f49b7cb7251e31f12a68f056faab16d2b41bc2a. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/DEY472574192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60393394d4dd13a6e278eac721785bae8b1f261cb2303f366a6cf40b8968c8c9. 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/DEY472574195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4aff7e34446d6b7a31dbaa6143742582940af3db7b02fbd47c16849fbc2ad3f. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/DEBE72100874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c62a818998fc81a399807826f729b040c2442b0ff5021bd14b632188516521. 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/GBLV61819004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0777f4c6e0acedc13c01f60daadfb8681aff1bab324df8359475f01b23f9ee8a. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/GBLV61819005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b94d3e992c817a07b97296efeea0e4a03a738cc55abc62adb77cc05685781e. 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/QMEU32029812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2506a434ade01e096b243a1bdb913b8877bb3a015874b0c5fd1acb7dd52d8733. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/GBGLY2304091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e5a4314dbbf5cea7cbfb0d94d068ee9be60133a8bed5292bf0e5a4867b4ed0. 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/ZA8212300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5722f22785ce55e0e9b6a0e682cc27a7161d762311c3a651aa9ca2c6caa5e. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ZA8212300024.