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 0x55c1ee5dfcf76a8581d6f7bdb9f9c3cae227142d7e414424312077ca2a7ce54d. Chain 2 (Bitcoin): anchored in block 953674 (2026-06-14T19:07:16Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5e3111ba-6097-42d6-bfdb-8b2ba73b961e.json and https://artists.proofprofile.net/proofs/artist/5e3111ba-6097-42d6-bfdb-8b2ba73b961e.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 0xcf6fb1ab89fc8417074879063933b84f94b830f8255f8c1e5e1104e333c89a08. 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/QZPLR2104791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa738f177d9afe48acb67226c4f12926d6a9e96362fce21c11923dcdbfd246246. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZPLR2104792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e2b6dfec3dcb2f7878f5d5f59b984cf84f7997ea6603355f411197318a0cd8. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:48:43Z), 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/QZHNB2578347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947d6cf0f2d789d538277a0e74ab093262c44a279b9767196b890790f01e190e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:37Z), 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/QZK6F2549059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea0b9c230ef508a2efa1dc7e81910af1bd0c4f027b6ad5b5f1c8cfbc889315a7. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/QZMEQ2548031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ba679d917c2505a93801bbfdbeb11cb3047c1ec7cc8a1f9f46539bb2a8d8679. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:10Z), 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/QZMEQ2548032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x947d6cf0f2d789d538277a0e74ab093262c44a279b9767196b890790f01e190e. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/QZK6F2549059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf893c5afd7b97a06b3f6ab0d9f6504fcb92a7b5ed6de2cde918a3783c131b59f. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:30:09Z), 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/QZMEQ2548033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9be75925a56f5c08c36dcaa498d76a238175dd7359b5459cd0df58d23409e817. Chain 2 (Bitcoin): anchored in block 956500 (2026-07-03T13:55:21Z), 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/QZMEQ2548034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80f7d4c23e1de4c356eb4e3b9152f09e2c17fc01fc437d9eefc7dbb07390362b. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/QZMEQ2548035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2745c49197815d2de68b5eeefd731cbb2a18aeeb6a2ecd9774bd7a8c7f609d48. 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/QZMEQ2548036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaaa25bce720cdd7b1b7d7e10a6fbb2a6978f8b56211054f0ded87ae647ad4e3. 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/QZMEQ2548037.