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 0xcee9bb0bce186288320172dbc66a76492878a467dd3a438cea86d9f75814879c. 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/983ad1c1-069a-4459-b80c-9d5913ed6ed2.json and https://artists.proofprofile.net/proofs/artist/983ad1c1-069a-4459-b80c-9d5913ed6ed2.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 0x69ac024b037941178a22ca948767a69161d37ad44ec245a2eb919f736a94421f. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QM4TX2419444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed33e5b76456a5f3fadd14bb8f8787378773fd59470ee2387f8443345cefab0f. 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/QM6MZ2483238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936474501160e8f220aa2207909b5e4350ba6722fda050d235cb49f233c5488. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:54:57Z), 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/QMBZ92482174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720ae7da4eede35565cdf3c4f82adbabac26968200ecbb61181e530804fd115. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:54:23Z), 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/QMDA62490245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720ae7da4eede35565cdf3c4f82adbabac26968200ecbb61181e530804fd115. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/QMDA62490245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936474501160e8f220aa2207909b5e4350ba6722fda050d235cb49f233c5488. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QMBZ92482174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e056f1081f37083fcefba073a9e31a890ac87211a4a3ecdca3a729005dc101. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/QM4TX2593508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69ac024b037941178a22ca948767a69161d37ad44ec245a2eb919f736a94421f. 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/QM4TX2419444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa936474501160e8f220aa2207909b5e4350ba6722fda050d235cb49f233c5488. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QMBZ92482174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7e056f1081f37083fcefba073a9e31a890ac87211a4a3ecdca3a729005dc101. 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/QM4TX2593508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12717d69705f7f4ba02f40a697edee0bd7ef7b264567699ffbc525bf2df34290. 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/QMFMF2455016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3b76de2c8ae88374c06073f50250467efcc797c5344024a1072c755a59970f0. Chain 2 (Bitcoin): anchored in block 958825 (2026-07-20T07:26:49Z), 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/QM6N22552020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb93e23edbf84a6fae41c61df71b3b4925b7787e7f637c1cbbc6e0935abe9d682. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QMFMF2455017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2720ae7da4eede35565cdf3c4f82adbabac26968200ecbb61181e530804fd115. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/QMDA62490245.