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 0xfef107631b3655bc9fca99279e30d61cf8a0f852b4cf492b3b3d4388fb217e79. 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/293f80c7-9b47-4a0a-b88b-370fc9a233cf.json and https://artists.proofprofile.net/proofs/artist/293f80c7-9b47-4a0a-b88b-370fc9a233cf.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 0xd3fee68667a2673e279174fde8e04ff9ca3fedecea7c7ef702148f4c74964e89. 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/INJ221906438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e54689e69bc0ff8498037c1b4e1daab7f2b14f0b7d785bcc4c8252290b75968. 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/QZES62391226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebf0975bcb986d0422d1282abddf0d97e8ba7c6c8be131376ca8f200352cc6de. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/INF232301164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf0c48dfd36ee505ddd1405a27e1a461085681edcbf2df1def8219d52aa60f22. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/INF232301135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6229e92956165a5bafc99b6375af536b117be1043c24a76acc82b6876b0d1d2e. Chain 2 (Bitcoin): anchored in block 958673 (2026-07-19T05:38:28Z), 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/INF232301428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf8bb2a047b9586f02c0ac9c2fd0c1673ec696f14993357c5b02625424e3c8d9. Chain 2 (Bitcoin): anchored in block 957599 (2026-07-11T19:42:17Z), 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/INF232301349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a58dc4697d4bda83e1fe87365e260a38715cf95092e799eb865f5389fc7e1a1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/INF232301599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8822023f90ca3c804c082e782cbc5c52ac4ded92fe0913fca48e4fb2d00f7176. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/INF232301634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb72f6d6798e6bb5ac6e20134ebed704781e31653f2c4692e24478c8493e570. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/FR96X2469037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b46b0989dee5dda6eeb028569dd6420ff2cdbfbb0da5380c4254a2e59bc6f3. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/QZNWY2414639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd121c04f224a5b18622b52a3f039e8a24f787e9fa17549506b6897a8ab0960d7. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:05:56Z), 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/DGA0T2449190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e42ebad42561230d42ad5a16f394c7799a0fb62f1d5cafd7e461381bf12093. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/FR96X2503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5795f10e45c9507112f5249686399ef0bc5cd97413c3d7f3499c40c648349676. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/INS182400412.