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 0xb3cf32dff2f0624512bbcaaa9fba06b0d07e3f787387a48522a9734a23861975. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a49fe1ae-8b57-47ae-8029-55e769e25faa.json and https://artists.proofprofile.net/proofs/artist/a49fe1ae-8b57-47ae-8029-55e769e25faa.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 0x1bb9fa431b7054e812ce7a9c6acddeef3520d94953c0a1b96c2663e8c76b1410. Chain 2 (Bitcoin): anchored in block 957852 (2026-07-13T11:25:45Z), 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/QZPLS2272837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f740eaa2a07b49953bfce1d4fa2d2a4912ad59e48410a74b3ea9246d3dfe188. Chain 2 (Bitcoin): anchored in block 958086 (2026-07-15T02:55:47Z), 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/QZPLS2272839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x875f61cfd7f5241deb256eb012219634a5fa19524e5151aa4150ee6df267a564. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/QZPLS2272840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe094632a824177e8d0d54c7bc14a32b1bcff3e0e77e6704d541caed70f03c4a2. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-17T03:40:55Z), 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/QZPLS2272841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1985ac6596b08d62b919b9f14a6d22f232b39a5fdac570b890b0b866d47d25cd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:11:32Z), 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/QZPLS2272842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5bbd40665af719b2cbb4693b023679a9cd6a0c16896524a7d85b2cfa8e559d7. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/QZPLS2272844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b9b1c40ae5a752ba06c998b2fbb999368566b3eda37334d130e149df2fcfadd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZPLS2272846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad92278d5fc05340b5fe80db65f7d054c5ca5de06117c4f2fa900ea12ad62631. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FOACY1900132.