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 0xbd276d2868515a184e952b9ac313007b89bd363658b079fd2ca13be342087e51. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8af4b7b2-0183-4d7b-a170-7bf4c6bdfe9a.json and https://artists.proofprofile.net/proofs/artist/8af4b7b2-0183-4d7b-a170-7bf4c6bdfe9a.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 0xbad6d45a93d5065e2c63d22f8864b4449917c3e801db90cfebd5e2c0c8412962. 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/IEAUV0700078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d25fac5e121dda838bb4ab70ace7bd6e3680f2abe09500ef68bb8dbad48cc1. 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/IEAUV0700080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x914d3ffd01224c312cecf459b918cdadd18a7670e6982414cde8b4eebee377ec. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEAUV0700082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7aded59a0a3682e94302ba605bed3ad833ab72ef5667e37cdc7f506b8c146c2. 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/IEAUV0700083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd22342757a98d25694bca72b9a4ebd8743fe08bd9f38b3859dfc66f22ecdcb2f. 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/IEAUV0700084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x839f9bcb5eaaf336c1d07b102e18cf75748ce3784d7a568e0e8cf24d41849ee8. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/IEAUV0700087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ea0ea4ab9548e5b7f0f5566bf0eeffd98eaf8505e78ccea5bbed06af996fa0. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/IEAUV0700090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0486f25500680de52314a9d60ea019d9e7de77cd6f23b72c3121ec98fdfa992f. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEAUV0700091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7359954f92a564147e19966a916a73bd792a310fad1439e4381897942684fff8. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/IEAUV0700093.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9cdce36e44b7a20c55b5da2f331497bd353c9a7bf0e060f72f8dd43871fc0c. 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/IEAUV0700095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc9d26ee4b089499fab0363b0ae316c3f3e7f8d596be6f8db3453fdf96b4d1b9. 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/IEAUV0700096.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x302b9d43e68483bc41bfa75d9e974f9e97ef3f73fcfafafd0a26cf221d7f33f8. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/IEAUV0700079.
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 0x4e5fde001838646d34ef8a022254188409ec32b2377e5eee4251926f612f7fb6. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/IEAUV0700081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d0b98253d208c5776c8bddbed2db94ad0aaa3b5bf770fddea52c04f7eaf808. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/IEAUV0700085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c589d479f387773b377957f2f38d0f269342dabed29d1b2779a4b04844a9e3. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/IEAUV0700086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dc9829f4ed780bbc696a678b5627870291db91321030a61fe9179f466097ecc. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/IEAUV0700088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f2aad635d3a9be52b9c66c3f42458ccba47e49558971200940a99ede85c21d8. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/IEAUV0700089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4523095c4897e5766b4d6fad8e98c419d8175863bc217439a4e21f3a28ee390e. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/IEAUV0700094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fae48924865531ac1dd8514bcb7e23588a61631d4dac1079de3f1f9bb0321d6. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/IEAUV0700097.