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 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 0x843e1b4168a1c1be7212cc3428eb6aab2fe0744719c0eab9eb2b85bd14515323. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c9ed6121-e286-446c-9f5c-193a77d95ab4.json and https://artists.proofprofile.net/proofs/artist/c9ed6121-e286-446c-9f5c-193a77d95ab4.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 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 0xc9341e47ea4c2bd90c7dd025e37dc3cd8c340cc87ecb6310db1e25f35836a0be. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FID3X2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1df4d1c8241fad580b0c075eed72159480f8a28d8cad6ea3a337106fcb5d24. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/FID3X2200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a49505db33daab88fda3744bb982bc00f7b034a93c08cae0ce9ab5e3386c8bf. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/FID3X2200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb051fbd9591616c30ff72774d4a6d67423ba1a61cb57642f9573fcc0d3231d15. 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/FID3X2200004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x163fb8c4cd759c2a7eff869ab978a238d2cfd6c0f46c0a5ee8e1f98945a3f520. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/FID3X2200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x100716e60852b3e526cf2791c421f978960312ae23210705994be2dd13c446d4. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/FID3X2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23de688a1a65150f31674665f38c5a8a1c2484d868d4ddcbda6cbb5d301439f7. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/FID3X2200010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3d1419764fe0e98106bc970ec5c58064fef15e19f2bf6a7a19537127efa3f3. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/FID3X2200011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ce183ecea2747613a2e4444423db1a42ac49c78cc650bbd50115baf5b045ed. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/FID3X2200012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c7aa23a3cd572d68d9e54db255e7c75ca083159a6c126590810eb12bcfb2802. 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/FID3X2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7a8065326f5ae4a01f0a2081853c0c781e9de9590f3bdcb97d0d32ee90add66. 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/FID3X2200015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb12f2e97f9810722a24d2fc1e26d84350cc4388b1b9e501718cfd1ed3049b784. 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/FID3X2200020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef363b3404115fb670b344e1957cfe14f4d8f016f5907915bcc5ada79e06f9f8. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FID3X2500001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97bc8958cc6375cf9f905b1fe4a0a5b680f26ac06523b88af4d33ece66d30613. 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/FID3X2500002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f452fc7f308646fa69ebba922f4d922eabd87c584c9ab2b018313245a18a8e. 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/FID3X2500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35436411840f9531254a39f03ceeaa9a508d4832f3cf3c735cc9320a32781568. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/FID3X2500004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eec7e69f82fe09301e143ddddc67c52c1a2ec2fa89dfc20d5422b599438d766. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/FID3X2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09576826e67de9ede9a5f0f59a99f1229b3d19e28ffc464e9be6eebdfd5bdda6. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/FID3X2500006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9f4dfd42cf8034b5d15ffaeb61ff8768abc3301266af288f246c4cec7a53c39. 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/FID3X2500007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54602de4a3663fa7d0d75e8d5dd918dac9966680b1e0cf5333a26b955cafeca3. 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/FID3X2500008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36f8d203459a1060aea62d21d07462db62817ba79395903a0ed2b464c472c54d. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/FID3X2500009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa33fa460031fe23296881a0a33624a14d2aa5dd589f51b24cfa63429ac066dc0. 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/FID3X2500010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd4f55518fa247dbabcfc479f4086e11a56bb07d46d7efda36f89f82aea23bfb. Chain 2 (Bitcoin): anchored in block 958639 (2026-07-19T01:18:30Z), 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/FID3X2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae98ccb040b5c5289cc7439f8385e720b354d47024e5cb6028944ec6aec47604. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/FID3X2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x396cfd886585a53709a985c0754af91bb8597532e993d3ff8fe7be50a99cbaa3. 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/FID3X2500013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6ea9a2de606b2641f15dfe4df40d359f10c69b6ee456e3a9b6f27d47cee0f5. 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/FID3X2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x965c94da11c2a4a2cf62e3dd9108770135591dffd3a11c7a0a80ef3414d2e6d8. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/FID3X2500015.