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 0x33dab37a12351a6c58a2c66434b53401a6a6d1d6fde69da2ed1a2296bf2ce055. 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/8240f947-63e4-4ad2-9594-48b4328e5f98.json and https://artists.proofprofile.net/proofs/artist/8240f947-63e4-4ad2-9594-48b4328e5f98.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 0x792ad61de2e0d2b7a77057f06aefee41de60d27aa51275823d73457dbdc5d9fe. 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/QZNW72370723.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1dde5adc65f34939d6fb1c46e8a4f4430574ce1fc9f30431614aead2e72e95. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QZNW72370724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4c1b73c0a57994fc739a83902cda709d69b9dfd074cf15d20d6a1d360afc1c4. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QZNW72370725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0786841f22d9f72f2c7505448782c10d3bdfd50e30626b4d7e6bea27e581315. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNW72370727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe51e113aa50f5e2360617e5cc266e4afceefe0d12fe004a7e6766e71a38e0c6. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/QZNW72370728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f24044b7cee6e75dfc14c18e3cb74cbdcda7a7f27c0a881250f4f45a7908449. 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/QZNW72370729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe11278bd4ae8e4b9cfeee3a065afcbe9f522f3757304274e0827f84288234e95. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/QZNW72370730.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44ae1d3873c34db48c181ad51c85690c0e9890ddf1db3cf5405b70744509d280. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNW72370731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbe38d40bfbd2323c82d86561f1295b75b27e2b58e67e163b5d6c187ba1b9cc8. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNW72370732.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeddc7e4934898080684ad0556494000a5e70fddc22a8855444c1bd61a8116382. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZNW72370733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16370cf67d7480425fb72dfa346123272b172742aec87bdedb580cd9ad2fbe13. 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/QZNW72370734.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d943509ade23f16c48cf5ed6c21f7e5658e17a0d76dfc0f5fedb5f6d37a247b. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/QZNW72370735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1469758480eaab240e8c53e00e7bec02090ec6415f30f27d92ad58dd54bcd954. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNW72370736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a2b6f900fbf59a8565eee0e29457e05215d281883e82e68616e3c28ff855156. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/QZNW72370737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b49306b99a3252d64c1fbe7c4848d82d6879f5ab48c5e6e6e21f626c78e6fc8. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QZNW72370738.