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 0x5bcd73e27f932944e39eca9370d92e7b79cfa03fd8324e2985665a8534d5b229. 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/bed5d3e1-2223-405c-b853-2aca92d59a53.json and https://artists.proofprofile.net/proofs/artist/bed5d3e1-2223-405c-b853-2aca92d59a53.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 0x302e48d0aab6910fb7dcf63c614d0fdd57da6c5a34aa0c300ba2699516e401e2. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/TWN711201005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdcee85eab547a16291c4f83948eaec111c8e24cf9bb4be81a55e798a1453d6f. Chain 2 (Bitcoin): anchored in block 957558 (2026-07-11T11:36:38Z), 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/TWA471702005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bb60fb2be09d3a40ba7cc8650286c6c7a7080bb0ba6d05d020e13173ba8db11. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TW2151930001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x864131db757523202faffca7ac0aa6b457d2f6aed0a59086456e97a44301bdc8. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TW2151930002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42e9bc3f733a6f92ef7c4f751b40b71794c9f7abf7d666f92455e775e84748f. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TW2151930004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d1a5cb399058ac737946a0d721d0c7f3a560bb768dc324433ca5d967461cf6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TW2151930005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa709a47914f2ed6448011728a35608320d65ead6b694d0528692a5b7a87a8ca6. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/TW2151930006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54f6f00d9fc754b330433da801efd807617c1c9909ce308481ec033072100d43. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TW2151830002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0200f07be929c6d70a28ec8451d7e2c45be5b1ee8e9509d5eb4752ad3ea7573b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TW2151930009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720cdfb41f71e47b4d58517dbdc56331ee17ce7cdaa5d59b4c1d582ad83b51f. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TW2152160001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa203c0bba36f588f7a7e9592ff5c1772efa5f483f22e196785bbfb57a9f40b06. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TW2152200602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5701a9bcb18f9a328398a97d54482b734a537e20d84c6f05a81b17f82585767f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TW2152200603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ec795f4c904954c54430b47188c8aa3685b854a1e887944771da6b3adae96e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TW2152200604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4540b4d7545f9da17c28165589cf641a6e23ccb858961bb412fede52ef3bb790. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/TW2152200605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ae9322d3cb1b46dcb678d1c6c0ffa72f0cd55c09314850ba81cb5e2ff617928. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/TW2152200606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1bbc01d55f617d799911eb952788db601238a79f8045f916d120fc5cf67d075. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TW2152200607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5720cdfb41f71e47b4d58517dbdc56331ee17ce7cdaa5d59b4c1d582ad83b51f. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TW2152160001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ac8d7358fb8a43d27a62f91c8eda86ecef005860ff4d7dc3586e3652114bbb5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TWJ012300705.