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 0xec17f8727b4e8f8e95cff24be70237aa47162497aa8605fcc01a0f3bc2e06caf. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8cd19b7a-77c6-42ef-878c-1053c34da904.json and https://artists.proofprofile.net/proofs/artist/8cd19b7a-77c6-42ef-878c-1053c34da904.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 0x1356466450bd4b3d81eaa5dde332a87c3c45e47d97ca9d9e53336d27dbffbf13. 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/QZTAY2319826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbccaafc8e2886a1d616e517226bca7fc598e0fc48e17c4b931025b1b314d599. 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/QZTAY2319833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128f8f8c3c0eb4fea482f6e0d34f170f1adce36a2f84bf72afa55d77a6403495. 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/QZK6G2411244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451f3b8e5ec7fed7e97ef03f2f48145f5f5f32d8d2780cd9eba7885cccbdc0fd. 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/QZHN82128219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a8fa53eb56864c458f2e0032a57770fdc5c31f2cf9a304d480353ab08e4210. 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/QZHN82128223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x061c2998e02693c746f9c079f7b7453e7f953b30dcf13a6892e6609281e78f01. 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/QZHN82128224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf956b36de0d143ea6193450402aacfa0df824f3e9580d1927432a4365a432eec. 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/QZHN82128228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b7b94fed80e292811076d3a66d082de956fa66afeb9ce743629eb8b048326c6. 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/QZDA62179485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817ed56ccd8fa4937ac5abb214b77a2ff04c4e7c30ce395712ee44f403b08e4. 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/QZHN82128229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5fcaf633a6f9c20369504502c0ba7de33a45b3cc945298f9efa498d85ca08. 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/QZPLR2206053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9d12e24ca9937b4053444f27986c3f5c21193d6ef649d2e7b9036b1a348f6. 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/QZPLR2248364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x076b9f4f3c4335c943a4ebe2cc4bbfd0af44e1ed5909add4723fd5f2520f7f04. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/FR9NG2000170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe817ed56ccd8fa4937ac5abb214b77a2ff04c4e7c30ce395712ee44f403b08e4. 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/QZHN82128229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46e75c152951012188e19d23c503bbdf83ed1c1694d5d8f2e808fe4d2211e86b. 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/QZMEN2328229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3784aeb6b96617c4f6dd44fc3db29093e414493a1ad91d66302006418b03373. 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/QZMEN2328233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd7293672fbec9f300faefe0bdcfd240f1b7377f84e5b73619f2f6e255081f0d. 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/QZMEN2328236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8c89839ada070286d02659afe23863db44f5d58a781106ff1ae41dc7834d65. 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/FR2X42233852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd889b06387c6ad29f6a14cd3be89cb5faf82b6e1900d7a241e81a01762831287. 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/FR2X42233854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4a0773d95848c2944c9db69b4338cb18049b5785febc69cee2c3ff01117be72. 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/QZMEQ2022477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7ca04b2b7dc88817f1bed628927f4e4e2278062c98cabc88ddc3a585099ccc4. 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/QZNWQ2014019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a08313c22c665c18a0bf915320fe5e4c6cc369ebb24a7bb2acb95b16636b04a. 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/QZNWQ2014020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104324f138e32ca9b01d568f3dc05493e5d4829edf925d77b6d198099d82132f. 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/QZAPG1774796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00c4beca3008fbc36819e9a2d4a8e7c9a20412b97040c77ea2cad6267c253a2. 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/QZZ7X2483521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fe653b1596b28ed789a4ae86e1238007f2352da20b4dd990a4ad0438a4ed9e4. 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/QZK6G2476233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b37538f33060d8e5ea742a87d21de90fbd88b007ac49ab3512ae97d4dbf324. 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/QZHN92451161.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71f5fcaf633a6f9c20369504502c0ba7de33a45b3cc945298f9efa498d85ca08. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZPLR2206053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11cb4abc33b604dee69c12a3ce041c24e485f5e07cb33baa82d89eda4470108f. 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/QZDA72178174.