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 0xfdfd4ede54604eb51507026f9024516b815d090fd097b35fe65ef8bfece32529. 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/205fb5a0-5cdc-4210-8a26-464d29c9f655.json and https://artists.proofprofile.net/proofs/artist/205fb5a0-5cdc-4210-8a26-464d29c9f655.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 0x9a16a91455438e8bcf0a9a8a1febf52de689d204e4543bd802a6b97595d10bb6. 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/USCGH2063816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3493dfbd03e9120a9b80c9ea694126304aa2ff471b88877edb87dc393dfe2ac5. 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/USCGH2063818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0d8debc9149f3de9dcd68542bfccaadfbbe054853bb7029960ec435b24c83dd. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/USHM21580047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe0379e7a27a7a8cecf09795f38192e55c4c404970eeec8a301f72ed9a3b7e2f. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/USHM21580048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3780e9857a3ebd2bfbd9b9146c029f22893b1edd27735191b6fad5ff9fba1d0. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/USHM21580049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ba7ce2500c15de85896963fb21a24f9613be24437e5fb67a882666847d126b4. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/USHM21580052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0008c6771b66a337ca6217d9d82549174e6eea405782aa7e8b61c64af7f99c6e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-20T12:13:21Z), 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/USHM21580054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf437c2a95527f1deae9cf5e9612a0757d13ca2f6a9e4158da368af66dc9cd. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:10:41Z), 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/USCGH2032608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8db862179c755789df4341953afc66d38124b0bc17d506bd7805e2f58075a7fa. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/NL4RX2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x775f7a67abf5f094a3bbc98e36a2e0174aae5ed906536998292f3f03ae22b3eb. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/NL4RX2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a0cc079347680c52d783579936be3defaaf2ae7efafd00a3050637e39fceca9. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:11:56Z), 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/NL4RX2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d62cbf3cec85c54b09fb17f0b08b9770abfeeec7aac2a5072d960b762ca922. Chain 2 (Bitcoin): anchored in block 957603 (2026-07-11T20:26:17Z), 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/NL4RX2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b76b8b8db40eff4960caaf055246227f80ace3b8e07a30744b1c028209dd64. 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/NL4RX2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ed5ac10c1f0b606e5547192fd31c5ef20b23272767031ebc4796e14a86723f. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/NL4RX2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce4c4e0f2473d9a4fa9de162e5b3fb1aa32cb98adf3acc94447ec3262ea71d7. 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/NL4RX2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68532a9a66e96be11216ee348a351e398f9083c89b4519e2e6f1e0c6d563c1a8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL4RX2500002.