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 0xf6584e642d4376039eb7f74f33b37d78f47d678fb8e3dd942911416e6f1e5730. 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/c8f1b3d4-cb4e-4d1b-b86c-12f38345126d.json and https://artists.proofprofile.net/proofs/artist/c8f1b3d4-cb4e-4d1b-b86c-12f38345126d.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 0x19496a767d62acdb6378bcce8419fd1bb003a253104b7f5765a26f0bbb422fda. Chain 2 (Bitcoin): anchored in block 958828 (2026-07-20T05:21:06Z), 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/FR96X1730313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bc08a3a69fa583d0140a9df5f32dc5c4abbbe95534fa08ef1905da319be7209. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRY601905980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53a42f8a3fdaf0f6e130fd8a5c4abf115c195b4a8f020778d96a1aa134548f24. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/IL1032050799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23275ea25a399a6eb309cb60cd217d3602be6ed30b8601e4c1a243bf58e968f7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/FRZ042000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9e97aceb0e431de08b70322738c0831cae0280f60553cbdf5727a840490412e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL1032051068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacc1a31f23398675b5b00d14f9921ddc93be102e4fcbb89698197df531da573d. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRZ042100826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e78a1cdd079b02836fea22a6d223431bd4866e4b1deca008d16330feefd58c. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/IL1012101235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc459c94c66895184841dd271f04b2d51f57f0f924d0274e6f6a418fdbab7816. 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/FRZ042200890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d6cc92b075f9cacd7a0b193813898631fad386d1b4cdf57d8eda8dd58c052f4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1012201051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5d51bf808ad72b9625067580347deb11e2de6ffd914f0c7f455313e8aa7d5. Chain 2 (Bitcoin): anchored in block 957888 (2026-07-13T17:43:59Z), 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/FRZ042201440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0926b811fba4d1cfdd73abb8983331caa1265603f5013b108f764da9814d0330. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/IL1012300858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cb3938413edb50b2d91a992adbfc8a396a2c5c2346b66640da7928abdac2c0. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/FRZ042300195.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bf5d51bf808ad72b9625067580347deb11e2de6ffd914f0c7f455313e8aa7d5. Chain 2 (Bitcoin): anchored in block 959063 (2026-07-21T21:45:32Z), 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/FRZ042201440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20aeeb9c584125233144d531993beff386cde9a6d1866b8f2e02a1eecdff7030. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/FRZ042300196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23275ea25a399a6eb309cb60cd217d3602be6ed30b8601e4c1a243bf58e968f7. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/FRZ042000248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3249161404a82a81e03f3fc62c5cd5f85b18a9a1bcdc9698200d6d911fbde9e6. 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/FRZ042001158.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437042737470a0b1bd2f5e26a03185af51c064ee9ce020a819b4e667413849a1. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/IL7022300276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x838004805e7857e3903a35ae155cfd76ef3c146679830c0441e0362d82af2038. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/IL4431901122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa59b78d757a6d4b29f5a7feb150746a5b86ebb2920f2b64d2263c4a7dfa79010. 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/IL1012200088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee2c86a48e8f4404decc83715d44505a15888b43279e04f47046c6f7f7b6bf03. 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/IL1012200751.