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 0x65a31b0ae9ceb698585a9375f568e0e48009b2ec309ad7b69b3194865c419e11. 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/50b4661a-86c4-40ef-aae2-2f040a2db390.json and https://artists.proofprofile.net/proofs/artist/50b4661a-86c4-40ef-aae2-2f040a2db390.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 0x69f2357436f5efff1404536b5b0249dd4dd272e94296dc99025597753f683db6. 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/SE6A92351008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2b3bb69c014e8f0c82b57e67a6369a68ca4837294899787403233c55c588154. 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/SE66N2301673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe016ac1543569353d3379d623c5b4c290038802f10373445373e27e775988a72. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SE66N2310788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51b4b7d0f54aab992b309d5f13af73088f1aeaf14650e9642f0f4fd3ff0969dc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE62M2338413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5beb7ce3e6e48e7715add78c30c15f077423d0bb9571dcb115ff9744ac68523f. 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/SE66N2372016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15f7e4572d757524b5136c8c6803619bd49b6cbdc017e92e9c099147db6ff4bc. 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/SE6XX2325990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41cf36918a838ff9e4b4bdd45373f468eba2884fc6c5b0bf715619a6436f25a7. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/SE6XX2367488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x586460245d8ed176b571956a128025789f44d1912fad0396b17af14f2b78dcb1. 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/SE62M2312149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf08532751e27233b56c770ecd8692edaf1410df2d2fdbf6560be924755c359c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SE6XY2362727.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ed751aaf334d71208b3dca4bbaf4971a8b76795a4041f1c2cb126bdfd51691. 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/SE6XX2347657.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79fe1700826d2315769902ebaa89cffb7c66400566ecaa2bcf4ea2fc6e4ed49f. 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/SE62M2329175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6b5f836b105743c3765a8946c379ac48c6bc2296408536e54674c80b848865. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/SE6A92320769.
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 0x4d552c94566e9242954bcaddc1e91bc1f12a1c9011e4935c8a1a23ec7639778e. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE6XX2333610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5e3c8bc9430b7c67a9d610d8448a5623b2341eb20a1a58460eeaa675c81c9fd. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/SE6A92321830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c006a28a37939baa0e199e91acd7cd71c0344d12f6e993f2ff5517875f7c04b. Chain 2 (Bitcoin): anchored in block 960153 (2026-07-29T21:57:12Z), 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/SE6XX2349430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd690aac8d9bf2ca07420db9916b86140927479fa8da7360c7fd3b7430b2dc084. 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/SE66N2314529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47b41d31465e34163801de61971f9e1cbc4d14df67c8de00f96ea9cf11306cd0. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/SE6XY2383816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc12fc75210a9975706a1bbb77bd45ca624762430bcca496c9a6336d295a0f5f. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/SE6XX2369721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56327dce2d4151936a4232f8b86b23868fe70cdd8cfe2f944cf2feb02f8d6891. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE62M2306925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2e125e82c98251a01bb70b7ffa92d035dec0b14e7ec8461a949093e275e442. 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/SE62M2348826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb6b061461ac3ba3ba5c634d72bc8fa2038ef9003f30d77d0d8e4568ea57196. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/SE6XY2394379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48441ea791310855c7fb45bdd81821ed4fc1def241abb5fc1d614708314147b2. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/SE66N2338276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526c2bfc8e88603e3aa4de403530da73f4f8abe293aca93386dec21e74caf4d5. 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/SE6XX2325518.