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 0xf564278a800ae3c59be4ee12870ff7cfdddc59b79e415d4f3558470cfed9d2d0. 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/43cf6e01-cd85-40e6-bea6-bc3a13643e0a.json and https://artists.proofprofile.net/proofs/artist/43cf6e01-cd85-40e6-bea6-bc3a13643e0a.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 0x123c7306d530f26542c523dab9f3b4280681a99ace6a64479ab99a75725fd0aa. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZMZ92519173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x725fe5b1d1e8ee8c1e1205b69b5989fadc2a7437aa4a90d042a1f120609de1e2. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZGLS2442636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ad893b865fa08ac1a57754e42850a6aff1acf70392cbb4f23ad008bbb0e4058. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZNJX2459481.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x109b52131d1d20dd4f3bbd6be0e7de8db7b03e2de312697c427b0213cfbd102f. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2485605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x477fd1e0252740e080817ca611bcc988900dc3a37ed3a69b7ce4e56ec987890f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZNJV2325780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb78de6990413316eebdd74299cdf4bce573db72f7668005191d6856d273c62ae. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZW9M2372597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3029d9b15779638a9ac6da64f95c8539c3a7b895bafdfea5bde60614397b92cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QZNJY2432347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dfd294e058f97681cf56e8146e2153ee95bd31874862b8a68a3f09d02e0205. 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/QZNJY2405205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90c9a4e6c12c216d5ece9d71c458b991c7af33f78cc619a6c427d01c3ce5fb2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA112325466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbd98e515fe92ca82fc6a96087bdd5ced9ac575ec44e293b6243fd6464f5790. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/ESA112321388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2831deb8c9d0cef1c60e2ab7fd29228a15767a11d37754b6a88f566ffa41ca64. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZ5AB2449282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02ad7f73b1c244c85f34d67fac2118e2db6cb44a6be107d44c6f53bd0bf9aa3e. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/BCBV22400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ec40d6115ccd36ac534c9acf6234ce35207195f5cd7aa9df4a55470767d8dd8. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZNJZ2287608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f30f2190a156b969576d0e005eb8d9fb87b009448440a6cd72b4c6b9eb47600. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QZGLM2503127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80fab08603832d220aa94ec58c2036ec0dbe3bec708b3acb57a85888d73687d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/ESA112457021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80c5e0e65db1cbc70fe43e86e7b2165461c6da3e4a56046f3b3f9f0cac77cf1b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/US7VG2503781.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d9128f45571521f58df1844c5a11bf927acae08fe2b40f5bf2f81fcb5986e0. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BCB8K2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2796af6f84cebc09b6b6732836d248f580ef1b66403b01a07f20e5c6307b379f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BCSUV2200393.