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 0x31da54f4e0e6c77a569b501dbdbcddb595672c46b616bed1e6157a9dcd10f81c. 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/6bc87ddc-c138-4360-bf6d-ff7ebb8e2003.json and https://artists.proofprofile.net/proofs/artist/6bc87ddc-c138-4360-bf6d-ff7ebb8e2003.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 0x6a84ac07b5aa4355374da3468b1ef3fbc87e4a87c15b119927bc89156ff0b770. Chain 2 (Bitcoin): anchored in block 956404 (2026-07-17T04:28:23Z), 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/QZWFP2438326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4c145592509f231cfb2d536c74a5e2811bd8e4e2dcdc38cbbb16f24f315b40. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFP2464311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3996f9c68472a8d84d74d403b1b461769abc46b9b51123f2e6411834466c5a67. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFP2464312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa2c1125266f4669c7b6d400a633e688ebac33fda8297b8e5324d036c03b1dfa. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFP2464313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4524d52c9a945719b59f526a743ed9d22b5b360fe0a69aa932695bd97cf82d0. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZWFP2464314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64b3cddadce88ac0cfc9f76a51eb353316f61b150a03acf805c7247ae2e24a36. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZMEQ2559920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56df0b289427143fe7dd4be4f4fc98eb83769511aeb111715e7d58f2317f6e50. 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/QZMEQ2559921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed24d34f11a25fe28ce14b873622b4a61e380c52fe81bcd36526ec1dbcb1b1e0. 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/QZMEQ2559922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x427bc53be71e6f7b697e0265338ed659492953de40a13f1e64aa4313fcc9cfa0. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:12:07Z), 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/QZTB22554062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeacebcf7c49214ae0a07e12c3228954a26a9ffd5cd67a191667315b711238ceb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB22554063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80de30985aaf9b2dcb3938d765bc0b93962cefb0ec4bc06c15189737f13ee81b. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/QZTB22554064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf99d036ef784e86ae8e57363f4c460ccd5aae947a65c10d55bef1c0a85140f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T22:07:27Z), 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/QZTB22554065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbedd2a80656c716948a37ef2dd22ef7498cc9df93cf21fd6bc3673ef9fcd6554. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QT3F62591413.