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 0x902321b4f59cebc16b1b97d3fbfc0295f6aafc067a9eb5a096c1728fccf7743f. 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/cd6ccceb-7bf8-421f-bb59-1c682e6b72e6.json and https://artists.proofprofile.net/proofs/artist/cd6ccceb-7bf8-421f-bb59-1c682e6b72e6.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 0x1d5d2e4e7f2dcc61f3a7e6e39e77da8f37d07675df1b15358e47ee95561eadec. Chain 2 (Bitcoin): anchored in block 958203 (2026-07-16T00:26:32Z), 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/QZFYZ2414661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cd93bc243825955ab28654f28dea84454d645208ae5aa429717f84f5e36181e. 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/QZHN72429529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3166845f7e52d9cbd8e4eebe40ab712dee42ff260ef7de77bcb685975be486e. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/DGA062447211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa41c05d2c4b28a135ccf39e76c57d695bdf18e6c0cde0a7cd7d6c21dcb7a44aa. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/DGA062447212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeba4c3272836f9184cb02bb964675232886fc2cc8de8ee2b4a5f5ad780c69fe0. 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/QZWFV2453465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb391c6b90d83dd65017175fed306c7ab19ff2f7f728d6ff08f3ad059a0c37d. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZWFX2438499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bbbe1681fb53e4055f53263e584cab65ab3c40b49482273083129b7c725c0c7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZWFX2438500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb67823e6a347da15cfd5c4c35f3544ad358fe0a68157d2fe5cb2e0959f1dd1. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZWFX2438501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a6f98cbd9990738a84254aa5707447ffe4477fe9adbd59d871cd52f043ec3ad. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/QZWFX2438502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x120bb4a2eb902f37ff41418d2b086080969577fc85f283c827cab1ca97cf8606. 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/QZZ7R2447894.