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 0xe679cc73ede9d0aa00695d28755b0050d5c39b6ed6eb1c625bef1d4548b58de0. 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/8a35be16-fe10-457d-a57f-32d666e89f35.json and https://artists.proofprofile.net/proofs/artist/8a35be16-fe10-457d-a57f-32d666e89f35.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 0x42decc4cc7bdd6c765c289b33204d1da923c95b98b1e8f3b82240bcf1b6dd797. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QM4TW1908076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124c3dc47185ac1c90586318a79f02fe326dd8db6202af5f88e22e93a345b04a. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QM4TW1908078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b6c4ffd867693fd89fa6118402ead38890681d6555be6ed804b56ad6e01070. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QM4TW1908083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b72c85f06f0185930e9cc1394e21fbc264bdba04df7d8bb97e31a8445552be. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDA172430079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184482c8b5d678cbabe51be8196f95d9cca3a4234ff9f4c93a4d420cb8684f4. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/IDA172430081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089726682f3c14af22439eb79921aca00bee51acad89a0b0b95293a90f0e4af. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/IDA172430082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9c6e38c1c57b4c344c6f9e617e22e3053660e5ab5aa681ae836b7db5f82da. 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/IDA172430085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40bed1d6866e91a44ed180d9aaa30677c27894df3af144075244f96b3c71335c. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/IDA172430088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbbcc7452330b8778effa8f640cf4c1e6c7f2f16aa098d89254e9145b42d2bdc. 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/IDA172430075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b72c85f06f0185930e9cc1394e21fbc264bdba04df7d8bb97e31a8445552be. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/IDA172430079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e4c444096478f453b056dbeaa35c09c0af6f720fccf4cd42b7e4dd0ac7ddba. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/IDA172430080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa184482c8b5d678cbabe51be8196f95d9cca3a4234ff9f4c93a4d420cb8684f4. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/IDA172430081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0089726682f3c14af22439eb79921aca00bee51acad89a0b0b95293a90f0e4af. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/IDA172430082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39d37da34022d95a9cb8013bc332568d9f194e108cd50fb3ba0372505f9a21e6. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/IDA172430083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd156a3a015647b53394d5570fde864a9e2f76b9331cef0a73becf0fdb968cb1. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/IDA172430084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85c9c6e38c1c57b4c344c6f9e617e22e3053660e5ab5aa681ae836b7db5f82da. 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/IDA172430085.