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 0x7cf4821c7ba1d45fcedebdec020e6081c26ac32823a90e73d92bb1c36bdc0569. 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/d96a0737-18a2-4ba9-a6e5-7f52412c35c8.json and https://artists.proofprofile.net/proofs/artist/d96a0737-18a2-4ba9-a6e5-7f52412c35c8.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 0x43143f8a239d9ad5d13b4d823c80a3e20112f85823e2874d6d3ceba876e03539. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZWDE2446814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc425d66be87ed2d23f2c014e13c7348bdd7120a2b72b8e34040fa6625311847c. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZWDE2446825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5e2580aa2c550036bf5705dfe184979517e795020879ebfb017d059d009934c. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZWV32444610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb357e365cc6a3319cca80e2a691d15fae66b768da6c16ee9d23be1a76e09d656. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZZ8B2452635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a0f33c46757ca229b8bef6131e4cc1f6560984fc5cb38cd68521aed904b5611. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZZEC2460542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c9318d1a383100fd68ef02addc7f8fd39275b2c29a74ca8e7023eabfd4fd7be. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZZEC2478601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3404beac47d5818d8f1f9be31f13c4744740e1623def267c81fa40b2044b4519. 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/QZZEC2478797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17927f3416c76bb913c429ae33596b6580aa11c83eb2b639a8c14e2f1af845c2. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T19:04:31Z), 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/QZZEC2478798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc22be8cc060dffa339595bafb3ccdd02f169fb27879d82eaed4a9d6d91a9346. 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/QZ5FN2549483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafcf947016b6c0fc9e3ea78be4fb6de088d51ed84ec46d7bcacce712cb05c54e. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZZEC2479941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c3ff9a162159a0b0295a65cca128d2688821831ee1165b99cff022a404ef708. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/QZ5FN2549495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaafa78b337ed333be0f202b9f3c05a21434615f9dfc8e3572fd3be5128efd644. 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/QZ5FN2549496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831ab5319bb3fb6ccb9e8a793f30d63b5d8a8bf35027bc27f8467fc11e80c7d7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T23:11:33Z), 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/QZZEC2479908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6d795c60f8846829ba5f83b8329cde02ba6910ad81a530d5414b894b8769b4a. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZ5FN2517489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c83e1c399150d7b44928e8162cc8a900e33082a84a4fbba471f08499ea1cea8. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:41:08Z), 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/GBRKQ2517716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44e489ea70f485012b969dafc2745bdab3ca354dc9bec9a52ebf152883cce381. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZTRX2523081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a9a8ab4d85dc29d0f3f48231023bbcc08529cc1dc945b20891e226a5a8e8788. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZWDD2563620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd66420181ef914ff4d07f582c140dacf4f27838248eaef2aa24ff863db4d9d6. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T12:02:30Z), 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/QZWDD2563636.