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 0xa1d033a30a7dc032a9c18b1f26f7e22a35a2bc7b7bf3f74af400b7f6f8877242. 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/5a4aab50-a19e-4b8c-9598-0976979d06be.json and https://artists.proofprofile.net/proofs/artist/5a4aab50-a19e-4b8c-9598-0976979d06be.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 0x1d78c8ff548a750efbcaf01372c2a62be5d9e84dcf5be0c733c8a6aa2a24b7dc. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QMFMF2022092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x331679cc3b2a8445c2aa2a52102781be127060ccd35c1b6e8bc4a94fe377b331. 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/QMFMF2022093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x222a79d52cf6d2f7bf74f68e761f4197d8d455c6741c623de27b06423a43e4cd. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMF2022095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5449ca25f7eed2a9f98e836910932b2e8694ac0305dc0c341248307a5b1f1dfb. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/QMFMF2022096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2752c4c8e723fd3bdc7e4f857ddaca35702193db9ac53f67f8b6c07f23580cd1. Chain 2 (Bitcoin): anchored in block 958430 (2026-07-17T15:33:28Z), 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/QM4TW2182803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x329c3f9db7815394b888381d78dd19130550d7f94ace5521fcbc154ab6500687. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZTVM2151771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3625c22ab6372d649c40cdf61d64013f1196980bfcf92f8e70bb05ad43e41c. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTVM2151775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234df311f33472c9cff2babaae6babe55d2e82cddabda016cd845b2aaeb21049. 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/QZTVM2151777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25c4d92e60d7cfd06c4b56d689703933c6cb1b38ec419b7718bff60427607a3a. 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/QZ5AB2287996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18f7c019e11aa403788b81508b63e4c96577d7db4d658ef382b874de54d5fc74. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/US7VG2363298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d500e74231f313616d2f6910b5c2cdb5834703110aab40fae823431db893378. 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/US7VG2363300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1353214e6456d9dc2256e672fda9f9a87a8639c9526b09ee8d52cac7321ad30c. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/QZNJV2356255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d3fddb26b91ea4ace24cee0c44ff4eaf5629f28ebadfc44456fcdc51e5448b6. 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/QZW9L2460093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e60eca28daf3ccc1b2f78a5426c3bc440034998e5093040a11fb2934d7732d7. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/US7VG2579364.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa198ad713eba4a6a06818ff3619b0604b93d8f77c936a4d8f3b4be1835d6189a. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ52245733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d3bff85f3430704e8e9c872ec4436e87d4fcc24090728743843ed1d7852366. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ52245734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aff5691562997236b91781ef708992972ea4f3f4411164bc9d8b6bbe8c08acf. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ52245737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc3829c340406f3893ff2e4db7e2f5d7489ddec725ebbbde1e7126e88cbe55d. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZHZ52245739.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bc94eab51976295ade85cb1512ce53e9ecce1a53894c41420c0e3658a54ea3. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/QZHZ52245751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78c56348daac80d13a07a57c2b4aac9576d4a846058d43eae098ccda81711d84. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QZHZ52245755.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88b7510775e4ba5ce3c1109a59263321d06ef14c9b6e40852eff3dbb10d4e5e1. 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/TCAHW2482413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x823edc0bb8d42bba71e0619ddbf5eeb4591de7c2ce0bb198eb6d2b9a117b823c. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/QZHZ52245738.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb2d21c4958d68f3c0522ffe05de4f7ee3baa43ed2522080ab2a39200beb037b. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/TCAHQ2354333.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d2a54f08325a595b86dc195c96643a7435fd22c14406d1e23419ac187907fb8. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:02:11Z), 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/QZW9L2291217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe2806790b9f1f13e6eb1aab1f8d69ff234fbe2090121840118c2e0846c3d96c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/QZHZ52245750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x029cdb16742d666bcf698cd82d6638c3053cb8676552f1250433318e44a285cf. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZHZ52245756.