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 0x9610e092ef2f6b0f992c8fbc0d72b24b94fab16174a718c2e4b130148b6d5409. 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/c9574df8-413c-48f1-99d7-de663d2e6ae3.json and https://artists.proofprofile.net/proofs/artist/c9574df8-413c-48f1-99d7-de663d2e6ae3.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 0x76b97a703a25d9f11c94ac387e68f1b105ad60aa42a250531a804e21d300f4c6. 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/NOUM72300370.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd90c0beff737d6c8534e04598cc0e2f34a9d57c25454bd874e298e86599b94b2. 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/NONO22311010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05aea563156d87890718e247453bab22515cccfb0d5745b77b83233cda3bc66b. 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/NONO22209010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe8950120cf4875f03b1dcfc1939b7fa11da59761a384de075d01b8f51ed34b0e. 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/NONO22205010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce7aa750eeb9659cd666571c3243fa760dd69291971f7eea79ff05805d1b3f33. 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/NOUM72200175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f82cf2eaab4ec88bdbc5928694361fb7823d38254e8102cabd53adbeac9d3b5. 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/NONO22202010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf51004333c05bf3b9ed267e08c7feae03f69bd2b063be6409f17e72879597cd4. 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/NOAJR2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x561be0e0f1c35c42b1dda77e9bc80d08364461476b24c6dc7d4ead36f93caa00. 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/NONO22201010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6eb99c6e53c38530e949515087856a5054a9da637354addec182dbc14f6486d. 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/NONO22113010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8810ba751f7b3ba2158f52ad7f443dcb1dfd4cc2831fae370df4c497f6a7fe3c. 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/NOQWV2101070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf028c26198ca8280b17357271c8c0ae97d000629a0eff726ff589c233f7d913. 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/NONO22001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b8ceba2fff632770b6adba6a9bdc8e627cb11faeeba187f10c675c9271d55b1. 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/NONO22001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda7dc3c0b8e3f9f136f62172415d71146606f496f84fe8bfea4a8e8a27d191c0. 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/NONO22001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f5760511ce23c6ab56311c6201cb420d4bfc51af760e6fa20299f0f55d3e97. 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/NOGTA2473510.