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 0x434e2405f561ad2b268fb4e5a26aee56fdcab4ea981af42e5a2a8bd935baf323. 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/16ad8c38-714d-47a8-8275-7e2f946db526.json and https://artists.proofprofile.net/proofs/artist/16ad8c38-714d-47a8-8275-7e2f946db526.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 0x26829b4948b8c9114466e2bf319d732b904e0a9f1aa821702d2d2fda3d54dbb6. 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/QZNMU2311462.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x680b94a630b90b5bd36b0950b2cb4191d45fe728047610a4f732e94318ce1ec6. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/QZWFH2377305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea723009af99b7cca1f852936d560925098c7faddce8634bf58f36c977451b9b. 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/SE66N2328840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d446664fa2d85b5be5257a811a22761a22129771dcc07e3b36e5f646666adcc. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T06:52:47Z), 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/SE6QE2416640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41d6b8a3cf290f73f7c76b40d3d5869cde60a60c311c78905294b7ac37c56d86. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:51:59Z), 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/US38Y2410377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3e710eeae92f06094b060614247ea9226ac5df75082ff37066a55412eb31dc0. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/GBMA22454231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940882d8f43935647ea64473ce48916028942b89da6c283d95f5d076f7f550be. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/GBMA22382080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c471dfb18b5fd4c9a4d8ed8b408c596d7da93c96f12f16cfc17c50a077fe35. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/GBMA22396359.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd29e1a18d7d1a66b54a978667ea8c5aa5c2ba548eb8efdd26706248e1ac7e3e. 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/GX53U2486883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x251d432af583cd2bebed56bc35883e08bbe4cb3391a608e97741531e340b379c. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/GX53U2486884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf0ab62c2a2a94aab8708c3eb0856f3687b6a52d799a07575bbf869e828bbf70. 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/GX53U2486885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b801a5696574b6e502727197279996afd0946111d9056990db348f62d89748f. 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/GX53U2486886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb72325f1cdf41e0f305455bcfc802e86b9eca8a1988fe9d2884a79b271cc49c. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/QZQAY2572501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7946e4a70bc2e0a5aacadf8a3e4ea5e6a9b62fcbda7943085bd69a9162021db. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZS7J2512627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b0f1fd49f5dce3125593ae59035242acbd27a27c68b8c9230686c93cb5280d. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T10:03:29Z), 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/QZQAY2593967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec7c07d9074a68293c1e4fd14f359e9ea4909bbd42e1ac2c1655f5e7b0ea3d64. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZSYP2512463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ce07d264ea757e7d8a2fdee37d686f8618a4e5325e4fdcbffe049c6f70a4ca1. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZSYP2507199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359ca6ac7722122fa7d2ed04746a94fd233382810ff0b40a6f572305e79abb7. 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/QZTLA2561176.