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 0x480b6453c8a267a96244618db1d3db8e1b681ffd3afe8691eafe9827fbf4dcd1. Chain 2 (Bitcoin): anchored in block 953812 (2026-06-15T17:06:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/f74be6af-1358-4403-89e4-b00c579c9d71.json and https://artists.proofprofile.net/proofs/artist/f74be6af-1358-4403-89e4-b00c579c9d71.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 0x1f1644d1ded27c182a3d3636ac636d4ce4690fc3238ea445b1cfc60085c372ca. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US83Z2481859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05eaf5c16460e8897fcc38089a47091ca20ae9e482229190196a17f04fa71975. 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/GBHEZ2403561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce756f06ab2510b387f366507b166cc4051fb77a055e45b178e8191609ddbc4e. 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/USA2P2417136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dc0e6b35924accf39c53633dd000c8236594ce6dccd101246c12646d077e56. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/ZAPVG2400072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99dee38898d4f77c699100fc0ff1712af950a132f2350d1b13d581a2021dd08. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/DEY472471854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda49c05e73e4d6856b10049c98830c6041d26fe7d7ee19b95af347ff5978930b. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/US83Z2457921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78b2e868f79fb71db463d27f93aabbeb86e3bec5b90ae7893a3e566084065950. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/US83Z2348869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6eaa1ab1e167b12810fa9ee8dbde0c73ad5102fe255699377a0a56e30fc0f7. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/US83Z2328705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4daa05be3f4b47f91b86c54cbbd046cb49d6cb0f5e576f65c710db1500f9251f. 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/US83Z2328703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb88de8052964ae25a975c6585c57429d86256f267ec26d39d702485540cdb4c9. 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/ZAGV62300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124545a5123818ae0c7642410ead750593b375347344e3b80aeff428baa51fb0. 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/ZAPVG2300060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa53aee97f83e9ca7501928122173325d6a0b01130e1555cf4431bb9014199c. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ZAPVG2300061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02854b22d1f1804def379816eac8966481894b8c09e812dac05d569960eeab1b. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/ZAPVG2300062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x845608ee9b4bfd7650954e0430e315de2bec31c7af9838f2d3e5225e6cfbc041. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/GBKQU2275608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0563eeddabc63ee8610fedc59253401e865b21d8c167033690eaa8d053138a8. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QMFME2102897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf907446cbdb843ef885f499d40733c92ef51aa8592b1a845373bd8d1d7ee5908. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QZFYZ2139957.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62f4e6865569fe4a1faa69b591f3fada1a738bcd193cf23f0342081e3615952a. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/ITF3A2000118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa057e762bd4beac6883ebfaa1709d82c28ce5fc69c5076de7a0196685d96733b. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DEH742031115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b0d8785120dfeefb1d87e382f1dabcfe229ac1d68124feb2e537cc402ed58d3. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QM4TW2034299.