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 0x9e9c3314a4e95efd54c27ecacf400a8cb6c02e8bcb9cd78e013fb0353498e894. 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/58153a04-063a-4632-899a-0bd1fcb4d9df.json and https://artists.proofprofile.net/proofs/artist/58153a04-063a-4632-899a-0bd1fcb4d9df.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 0xfc2e26c54dd1357d87ec6044a7856796795392f6149acc718cb77439dcd0a136. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USAGX0506087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc90bb92b67392a6353fa093b29bb9c06ebc9909aaf60b666f438420d22878d. 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/USAGX0502391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16d24bc9ff79d6458e46110af7a1faaf101ae2e88fe73a58bbc8b9813d21d2de. Chain 2 (Bitcoin): anchored in block 958060 (2026-07-14T20:39:42Z), 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/USAGX0502393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f72eabfbd08e2d3d204c63a0ae6b40db0bafaa258ed0f9b0830136c7a08f24. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:07:33Z), 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/USAGX0502400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28b899bc93dc382f5d486b92c024ef0f7e478e45f3a062823587a550f0978f8c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USAGX0500055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa37949a9f1acc6926aad0df40291ed8388d8bb7e7975e5eee634de8db04a30. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/MX4971505043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6a234d2b9c005e723fd37ef3db5ed91d396e360e4f8c70f57dfb9fb475caa0. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/MX4971516004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x908701129fa5461118933319004dab1415b8220675365e27a0afba2456bd5268. 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/MX4971516008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84f284c75c3aa1aa9c1648e2bb672420de9af148a8f5136b63230c523634efc1. 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/QM6DC1708464.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7748e8705737cb4ccec08e7cc6477181ee6029f1a20c669f1f51b3038d840014. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QM6DC1708467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5696b686c7d17f4a5e882575918d77421e6f87a6bc2ce2e9a03cbe9c90d0d49. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM6DC1708471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c9689a4cd30a8c8f9d3944a6300d1272ff42f6a20ed79ef8190455a212b02d. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/USANG2104428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf76a40816cc8a6024c86f409cd83b6e868f55f8b2d154e8d22cf29b6ccff984. 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/USANG2104434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc961f123644c880ffed5ba7e2ca33f2151703245836dc00bd8904131a8169de1. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USANG2104435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x889cbc537852d6ce4d7a7ad7e7e4f1d231563e7da85d9a4af4af094c334ed05d. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZFZ32326358.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87bf775f3820af755f2592d550daf974724126b49e24cf47d9d05379d3bb9722. 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/QZK6F2345272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d032b96787924f9f38be84dadf3ecaac3114666617c03f49f545c274885238. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFS2407632.