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 0xfd38b37764be1712a7ecd7fb33972e0a5ad10a1455a45caecb511c238a6d2c50. Chain 2 (Bitcoin): anchored in block 954742 (2026-06-21T20:46:40Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ff069cce-361f-40f1-9bd7-f3d935194b14.json and https://artists.proofprofile.net/proofs/artist/ff069cce-361f-40f1-9bd7-f3d935194b14.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 0xeeefea0c0f0e2920974b9d149162354a12cd7aedf2c6072e7ed849609cbce634. 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/NLF711600053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0899c3dbb49774b0478ec6aa12da556c73bcbddb35edecf9fbb4a208f83e46. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/NLF711500075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x376575dedc62728a2af988165b1bb32c4b9e2c54d82e28faf228280f3bfd39c3. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/NLF711507443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071ca62d53d8e077cc9de9084d92cf49ca4009cab65bcafa741189fede4df9aa. 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/NLF711600619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x525ac81cfe3907d414c8c7e79bd7ce3ba14f2b76e58b71d651f69bcb6e2cd6b1. 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/NLUW21500196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c300ded42f7430d352fe1c35582a93d35504a260fa092e5163d243beeac88b7. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T14:48:32Z), 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/NLBW51500124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf361b5e4baa195c4b868073ac0afd07da840dd2cd54b9e044ddc4a6d0eb38e3. 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/GBLV61515008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17685953cf59895880f76100ebe424b8e7f5f288ea28e6273c2451adf6379103. 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/NLF711507083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e98abf3b28a02cbb6bf85a204c948f19a254533dccef3da9cb9daf7fb04e566. 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/ITW881500173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x743a2d7ca5c1f55ea89d44dc11a12e54c8a4af8cacb1743eceac511fc021e124. 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/NLUW21500300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7742975cad21e9868a2eb81a50152f68feda348bcc2e64198a890a298dad279. 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/NLF711507431.