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 0x1ff735f8eaeb35d87afb7242316f27d8cb0cc8ec287e5033226483ec844fed8c. 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/18c81aca-c004-4acf-aef8-3aeb43cadb9c.json and https://artists.proofprofile.net/proofs/artist/18c81aca-c004-4acf-aef8-3aeb43cadb9c.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 0xe901ff9ab36d0d1113f7f358c184499be6b405c0215c35a89fc5aceb06f36ec6. Chain 2 (Bitcoin): anchored in block 958142 (2026-07-15T12:55:35Z), 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/QMPVT1200002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15075e3b82d126f09e2fb55f852a7181c47db6136c551b1ea206ff931df7bc9c. 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/USVS31552906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90888473bef6664bbc7f2a9588f23a45298416d58093cadb96ff1f7e5aabc598. 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/USVS31552908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x609ab9ea97031f2abf28c1c6b5f3b592e7d6e5278ec34b1c651ad72374a6ae88. 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/USVS31552909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d56e31947c5e883b293297b4d5898caedb82b9cba4db78f531227719a992c36. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/USVS31552910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe56ff0e7625270e7ecb2b164ce5703163b0058e8ab018f363e03053501410718. 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/USVS31352537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22b0b21d4ce6a13b978dc4225fc13e21b6b2841d6605ca952166ee9ae2c2ee4. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/USVS31552907.
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 0x86fa69d1fa82fdeeb686d048f281071537b5a1e8976cd17142081670836bf74d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USVS31552914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6854eadc529f591ff4b20959e06aa08d9b1c0242d27a107142461aed0a4e53d3. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QMAAK1836908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf540dbbac8c8b349d1d0aa6e425e8015d660c511b4295e513e5ee533a5fb55c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QMAAK1863445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cdaf882917d974dbc5e32645558dd064200d2ebce2486d091a946211cd857cc. 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/QMAAK1863449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eeebe88c5f0b723dae9b675763e3cc3e9c5c7d4694545b738946ac1765c6647. 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/QMAAK1863455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x510c8ed44cd892947472f441e7e42065983e562bbe1e4e7b435d4e6c1e764b01. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/USL4R2082629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73dad4ebcc01df78579dfc2cb3acfbf7f02a0d3ca0a52c34d88ba84d1822f9ee. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/USL4R2082630.
Where'd You Come from (feat. Choklate & Phil Denny)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d616973231dd6f823c6f40fea9bb7dd652273e4cd870af7dedd504633c0b9c0. 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/QM6W81400015.