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 0xa01d075a216869102d70acafd2eb4b8b941623c01392f045fe2e58970ba9a347. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c4f2bc37-a4cc-4a46-88ab-80ca32f46ca2.json and https://artists.proofprofile.net/proofs/artist/c4f2bc37-a4cc-4a46-88ab-80ca32f46ca2.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 0x4427433a3048db863f9e8c1d4f40ab7b30016c50bab4e7e3c4353547bf416bc2. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA1931030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7781f8e3c60b4c6bc06af9939957aea459d118b394e97f9644bfac2a863920d. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZHNA1931035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7436f74d8f01ac78aab196cda9cd52f96f19b58e9f8a4a3dd6316e0085cedf44. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHNA1931036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60ef93036557bed4aaf1bcfa7b65bb153a3b48103e5b5f0e9dfedf7d41ac2a40. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZHNA1931037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa43d0aca318947d8f1973a8cc11a468f541d48e44f42732ac442d0c86af51535. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/QZHNA1931039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75ed8a7c84d916fe08591fe634e1663899e43efb4adc3a20ab4e0c912ffb4e9. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/QZHNA1931044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd00b21eb142ab9f06d12121fc0063928cf9b961d7a3151cc4fda9aa80e9081f. 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/QZHNA1931727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf365bbe69cee65842abdd228dcf5fcc29a634fd35a34a261eeabef871b16a7d8. 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/QZHNA1931734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x844671a4f686a2e0a2b55c7dbc650bf747257f6feea498f4395580ed724c8b30. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZHNA1931739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x953c749ed08716af4fe8d3c0f435a5e4db87cc9c3560841b8361f27e47e8644d. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZHNA1931740.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x440f4911b3400630a48b4d5c3a4b968cdb71d3f2eaa221cd6380a61a2eff6d92. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZHNA1931741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x988dd114f3bb814803ee463028fb067d8624aabf1218224c8adbc81c1b858880. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZHNA1931746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16fc064434c5e5703f9b5dabd104248e40c88c1660c8cdf52caebf2333a64e17. 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/QZHNA1931750.