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 0x3836a0b2cff7a7511acbb104a996a4e6eba9dcd71a7e225a9b7ab2abbbf9196a. 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/d87d6292-47d3-40de-af32-18b217294056.json and https://artists.proofprofile.net/proofs/artist/d87d6292-47d3-40de-af32-18b217294056.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 0x3377e86978eba53e723b50816eedec83e180cfa65b078526ac3aed2fa881a653. 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/TCADX1843632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bcb285216116c0e8ecfb9727eaa947d4abfbd8320efeb1d7abc31f2a55e75ab. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZ8LD1992684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfeca3cee91386c6b80c572ecf77a3c2b8c6bc23992cc0eb81076f15d8548241. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA42241444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53d46996052f80dcce6fdfd2a00ca0956b068a7990a480b11212d9341e81652. Chain 2 (Bitcoin): anchored in block 958823 (2026-07-20T06:59:37Z), 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/QZES62285589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6136c5feb00547fe4bde40c4855d242cd8d8c1d4e9c6d6c0a8961ddfdca7d738. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZES62285599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7e22539e608d52a8644d1cf0c06fe9b1aca7a067d065a86ae75c9e5c73c9e9c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZDA51909427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0d5f76906527d140a8c85916a8d752b75b99cab8f164bfdc26aa577367f0f20. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T05:03:05Z), 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/QZES62285605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc91fc525a959c5cfe28662199171b1fe70bb3a99dfaa6c4b80724bfb093e9307. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/QZHNA2503024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3f9868d56880d293a5cf8ac57d4217dd05472514f547944c99a2974cc6c358. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QZHNA2503025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fa8d798d5adaa7fceed44e5a1c05faee9c88c6345c72872168ee7fe798aa226. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZK6K2514605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37707646ac9b1c7f278848a23501a279f045d6f104f6607535ea173694cf9e32. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QZNWT2521370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8308d338c88e43567ad5c8b1ffae0966e828e441f1662004e688413e204b66f5. 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/QZTAT2593738.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00f75441a62f0f9d6872e7789bc52cda76943354fd91c9e3810912477e401eb5. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZTAT2593739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5e15279561cdf8891d9cb308baa68927222a634a5313e6ba09e44b0905af752. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QZTAT2593740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dab420df2ae0d9a57a50aa289da5c8eb5a84b340316e61739e8fa95d0b4c2df. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTAT2593743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x866283694259fc26f95741887f4a0c98de7f340a41df2aec90222c74b6790bca. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/QT65Y2515820.