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 0x7ca10f0e85abd6b1def7561d3421f8cd4105bc12a507219534ec08ec253a9764. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6c3d25ff-a1f5-417c-96ed-3a77bea0af5b.json and https://artists.proofprofile.net/proofs/artist/6c3d25ff-a1f5-417c-96ed-3a77bea0af5b.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 0x7e950d61a207db40703cb79f9b3995bf53830266bb6967a49a23afbbeac3dfe4. 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/GBBLY2402315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c14f482eaa209bbde8a2114d5a92fc4172ba79c759974b524f131a810536ef5. 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/GBBLY2402316.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb332b9a1de3776a3397ffeccf59320a47b66b95fa46f43486c412ca50438699. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/GBBLY1200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8fce341bf76a581ef2f24a19a70403a8b3701650fec1d647764a568d48704. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/GBBLY1200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5452868a6d0b7ddec8b542ad50ab6f97dfe673393af0db189312ef7562ed0150. 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/GBBLY1200144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e744a5ef28ff50cc3cce20dd19c673adbae0b57fd118b50af3ee4b7c0dbc76c. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), 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/GBBLY1200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a613f4e3f098cf605f8adaa396977f9f0a22f93a739cf1269015d5b2a570713. 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/GBBLY1200146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac326553e30ddad96a43c5dc6b929c709c70c389c23fa2da8e771f1bf28edb9. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/GBBLY1200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2439faae2a1acf9eeea3785cc45f0d590c70817919791d839cd153c54a19560. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GBBLY1200148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9989f788bf58c9ce2ca6db69f123e8c58084eeb94158ffbfdeac24e446ff1a18. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/GBBLY1000144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d875dae48fcf96d40d96de649693c8e4556dfa16a0e6a2e5e7486b458d9935d. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/GBBLY1000148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddd4c0e0ecb94d8b59cc3227d940f75ea160d7b11b725b1d55e48b90c94d7f62. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/GBBLY1200140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5d9a35fe2c7131d7da1a8b490fb8f2406821443dad025ef81097be082a68c43. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/GBBLY1200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb332b9a1de3776a3397ffeccf59320a47b66b95fa46f43486c412ca50438699. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/GBBLY1200142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e8fce341bf76a581ef2f24a19a70403a8b3701650fec1d647764a568d48704. 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/GBBLY1200143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e744a5ef28ff50cc3cce20dd19c673adbae0b57fd118b50af3ee4b7c0dbc76c. 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/GBBLY1200145.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ac326553e30ddad96a43c5dc6b929c709c70c389c23fa2da8e771f1bf28edb9. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/GBBLY1200147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2439faae2a1acf9eeea3785cc45f0d590c70817919791d839cd153c54a19560. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/GBBLY1200148.