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 0xd853a56279c52c63d118dca512ddc5a3d4bcd521e46718eb1ead9dff352f9fc5. Chain 2 (Bitcoin): anchored in block 954346 (2026-06-19T03:51:26Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/92b8b5e6-cb71-4cdb-86e0-5e2a908344c7.json and https://artists.proofprofile.net/proofs/artist/92b8b5e6-cb71-4cdb-86e0-5e2a908344c7.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 0x7f301b888a3440a0bd7ea2cbb8576b999e16dedd27235ef6b36b705138c528fe. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T19:55:48Z), 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/QZWFK2581956.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c431cad2a38b4b48fed61aa69a507b2e17ea0bb36fb509e4e8f9c84eea45086. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T23:48:25Z), 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/QZWFL2583254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f72f0ee1df13c64e024792db03400f10e882535deac3b263fad20da911ef74b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFL2583255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x057b97dad3fed3c7dfc610f4ed8f1481e77620d71681a87821402c5763a20365. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZWFL2583256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x817a12c2e69d1dd591433ded962d34ad9a0d33a56a52fd35f44d5cab23e8dece. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZWFL2583257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9591e61022932a65e4cdeb685ea01d9864a2e9727227de84a50e9addfeb873b8. 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/QZWFL2583258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d87035bbb8a8307461cf1df17808b873316cd271c5519e0cfb0d383ec66d07e. 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/QZWFL2583259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0720271516e12cc731381ffacc0633be23141ceef937cbcdcba40b82c01db7f7. Chain 2 (Bitcoin): anchored in block 958842 (2026-07-20T09:39:31Z), 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/QZWFL2583260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f21725bdedea7bb7254bc4ac2ce972860b41378fb2c9914838bb10cbaf5a965. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T15:59:01Z), 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/QZWFL2583261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc1acd06b5de1737f3a8019f66ed4a590b558c2b77ad768a9c4cd18cd2464337. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:53:18Z), 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/QZWFL2583262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc752e01ead6984e0859884cd7a8759a9240087e5110390f9409eac8d68f34c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/QZWFM2585035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde6897ae24a41030dca401259cea714b8806d98a6b87609d12d1d00405712b08. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2585036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8245a0ddb346f038461b8205198c86f2361140756baa8aac2a05a7815cb4632e. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFM2585037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63ce8de869dadafa2ef2f6646b08474578471b777d9cae05a9164aaa265c6d29. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZWFM2585038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf151542c2acbc07af6f470841914c7f419464b8982fa7bf0501457ff8f631552. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/QZWFM2585039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73fae593a341bd3f140ac1e3bf26f031415caa631ad855d82f7dbb6950432b6. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:31:22Z), 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/QZWFM2585040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47be16b89451a003120f415e5e35c8cab301e9bda25d7c742ad2ffd1a49e3589. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T10:57:35Z), 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/QZWFQ2526329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba8a0f6220af0d5f80880cff148f586f776808be67f8f72bfab4c115105bc007. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:44Z), 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/QZWFQ2526330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7ab384fce5a54f0ab3f5af27f87eab5ea2c904fdd0a78d1076e77cac54cfda. 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/QZWFQ2526331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf520c33607482deaa93bc9b1cf7331b0219da393023d392aaad39c35348d0dfd. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:35:03Z), 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/QZWFQ2526332.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa830dd055ffe912c40daa1f578c68515b7644cd25cf9e375962fee9b13fa8298. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:58:23Z), 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/QZWFQ2526333.