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 0x3f29db25b640a7a45ef3048551212a79151a052031dcd06f39c267b6249b69ac. 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/163871bb-5b7a-423f-889c-7e7adc8533c2.json and https://artists.proofprofile.net/proofs/artist/163871bb-5b7a-423f-889c-7e7adc8533c2.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 0xb215c3ee9a2853b15455e1f7b543543615746fa7a642bfdb7bb4eec2d5d33a45. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/USA3N0400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9815e8145a3dc6e06d5174b59e1c453edec926f5ebeba67396ced19bcfc92d35. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/USA3N0400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4ecc540aadbbceb828b042fe2d0d156e2bc51688e5cf1c24818c3f789cde076. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USA3N0400189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d2362041719c6f0f576b047b962b12546e134cdeacbdd02648c8f1d5f8de7e2. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/USA3N0400194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe58d51843d9f2ab9cc2f0c0d9d2c02c829bc1e4797adef327b1a1aa0e77d076. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/USEP40364106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x123cf027f01d84e83bde124a81d2a41be48d696ad9ee77eb1f4b118c47df256c. 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/USEP40364107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de441fc962c3b4aba33389e6ffb40eab2fc6193017710a4ae78be4f3eb8687. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/USEP40364109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ae6bcab6ceb52a3a514c22a60e03e386ab0a7f21fab95b5db90d49018681da8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USEP40364110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19a3e70442b3e726fc54a4d465c393ecece3892a1b0c66663160cffcb69526b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USEP40364113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ffac1025c389beeec2125a6c5e625720774e4ea06e18f3a61d3dc1a2e2f5b3. 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/USEP40364114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x291df25b4f8cc3d29e0eb5b49ee671670055fbb7d4e01c44e7adfb3568057089. 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/TCAFR2191315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc32e8db1f76ade1a57b131f5658d3959ff72a3593ce69c8b045bc60dd85f830e. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:10:44Z), 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/TCAFR2191344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e01d5fca792fe56f3d54b6f43fefd668069635cb3edf48bd19985858fdcbb35. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAFR2191355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf94b24934ebb3ab3ec63b35b38f0a62b5a02eb435f0298a5c6f6c9f12277e30d. 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/TCAFR2191376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x591cc0e1b5749a282fca2deb7576140754df6c8db26cadc3fc62425f2b24e645. 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/USB4U0471011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eee7691cbe5e3e10acee5bdb24c8dd32ffc6699cb0700ecfce329d7f3cf76a. 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/USEP40364108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c0b8cf5b2351457f7661095d37de9a0620b539d73cfa44e891b46baea68eb3. 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/USEP40364101.