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 0x553faf4b08f07002919bd94be1534e9e5e61bd68d18c1b25e656b5970461bec4. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e326f783-b4fc-45b1-b77a-727ffb9d821e.json and https://artists.proofprofile.net/proofs/artist/e326f783-b4fc-45b1-b77a-727ffb9d821e.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 0x6c4e0f3dbee9e27fbeafbc5a966b6c7ae6898446a83e0e143942f28815764289. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCO3K2200092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0056c393d026a4604e60d727ba8a102ddccdae1d4b03fe09f1ef7e7a841d91ca. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T04:02:32Z), 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/BCO3K2500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3afc22a454862dee28448d16a088fbef1a0c3bac2c9c6b3ef3b48236cc339118. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCJRA2200018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd8ce0ce8bb299f22819944b429e68e7b2dee946777acfe9a89c435d9862619a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCJRA2200014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d5bd24f0f7225a66a0d037dcc642ecb7ad400d57780aa273dff87414ba81231. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/BCO3K2300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe757cbf9cb19710fa63cf193a2548ef8c7445f4be343bf61cdc124d1a6f38ab6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BCO3K2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0c7f9e84528a0cee5ad5bbf30ab8bf19e7f5f32268192e21ef5e1cef25ede88. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/BXUS62100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1abbd7a53cb1496defb3bbe1976b35a33a19b027dc5e14683f1b6d6aff896e25. 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/BXUS62100014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c71ca2ddb4c8f891a08456a6066df0a7012b5556ccf3b2a42e7e1f4fdc771b. 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/BXUS62100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x869c222a5991870c63685552f8608736cdf3c1705759c5556aefbc833edcefc2. 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/BXIV82160047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe82b9636453d3ac56b86a0064523337029afa61af40b9605a15ec8013845f55. 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/BCMS22400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5389f99b8a3ba370a5a578531b3b2a96e5651ba5b4579b3f769fdeca8015e6aa. 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/BX6Y62400090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7b420998fc44b85daeff365e079c9f5679795ba5bf8e89a5db16b01009cacb0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/BCO3K2400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0cadc13bf675063596d9feeb4b46d18e42147dd8a2ba5fe917206e497d6f448. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/BRWMB2301006.
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