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 0x109e960a2d9810c4cfc21c3a1aa245498bddc153d9e1226d139a2a27f54e6600. 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/f94765b1-fcbe-41d8-baef-354e259711de.json and https://artists.proofprofile.net/proofs/artist/f94765b1-fcbe-41d8-baef-354e259711de.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 0x8cd4cbd5825ef8b4427e79e5e4e0ed45604c9f5498397746b031ab5795b02ff1. 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/FRX762295176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc853b43c47a63d574df8e7a7bcc2422f1823ea4166def6392fbe41b2bef71926. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/THW092104587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e9d23b0b648eb110e0761aa4635d240b1e141a6bae4cd45444816473c9ed17. 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/FR59R2292030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1475ada3168c1d61a799a8edc7e6f14b34efb2102ea5b82f9e8ee637f2f40bb5. 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/FRX762295177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec59062e295cd3ad6687572a2afe6485f5c2aaf64c46f2b7f65c47313c587a. 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/THW092104941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b83da874b558faf94bce638cd098df5ddc8cc1f1cd2d056224aac362843fd18. 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/FRX762295178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebc023478616926dab806540c9911d46a7aa3266d902c4b9b83967a0e5698d. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/THMOB2009649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd672f8c387c3ea91dfc3fed067fbe763247468808abc3463681973e0fe7362c7. 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/FRX762295179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12656ed177f0cb50b2c67523f5d102a29b0ea9beb2f318c4ee444e4c3abd949. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/THMOB1907184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd9c43a5f24bec6b2c06883a40f3a59f99598173cf16a3a129d11b3df71eb9. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/THMOB2008843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc47ab3cdfd6806fe8fd6fb0f426da907114f9cc452bc06fc9d0239e6601c5af7. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062367560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43d7a4d73dcf016c0b02eddb963d9247383a696bb2814cc85dd1e6005aaab651. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062367561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x379e654a947a2160994b76733e4d97db0322a5b7c494a8c5548939d724a8240a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA062367562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7f337392502a6f65019401bc1f2825fa363df34d078932fa503daa9dbeac40. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DGA062367563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaec0f57f7d4b17fef12c9b2ee6447221ae6869a7346eac27e4d4853a943832d. 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/TWA472319014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d9d1c8a886fe80d79845bec23338afb384cdba2d2c7b2e3c474caf2ebe2373f. 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/TWA472319013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03ec59062e295cd3ad6687572a2afe6485f5c2aaf64c46f2b7f65c47313c587a. 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/THW092104941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc853b43c47a63d574df8e7a7bcc2422f1823ea4166def6392fbe41b2bef71926. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/THW092104587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae4710159d4a8f684d51fab67ad2fc720dc4be477804da48a1226eea44e71185. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FR96X2137529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2ebc023478616926dab806540c9911d46a7aa3266d902c4b9b83967a0e5698d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/THMOB2009649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ebd9c43a5f24bec6b2c06883a40f3a59f99598173cf16a3a129d11b3df71eb9. 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/THMOB2008843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf12656ed177f0cb50b2c67523f5d102a29b0ea9beb2f318c4ee444e4c3abd949. 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/THMOB1907184.