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 0x80c8c59cdff13ce208538a2c896e7cf162abd36be41b14469aec70f3a77b272f. 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/493d1d86-8bcf-40d9-a101-3cf71d429f47.json and https://artists.proofprofile.net/proofs/artist/493d1d86-8bcf-40d9-a101-3cf71d429f47.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 0x59ca157810ec623980342b751f78c8e02cb4a2b50c6d83f9768ca6d8876791da. 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/USEAX1603009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4408d71ada71366a6c0866048025bf80c8073a008c07cd5d9e455f4d4861efc4. 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/USEAX1603013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb547c1969186feac1bbcee39a3f9d9acbcc9f011eedad99b23d408c6694077. 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/USEAX1603014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02f10fcc69a33f33b056b6f9d4c0be1948cf5593df36296bf6fb400ea63afc42. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZS1Z1632541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d782f5bf41d2ac490a225a8bb62dda4cd7452f3c582f806d380c58fefb7e69b. 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/QZS1Z1632544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x919e341bfddfc574e57c2f4462710762041aa5adb3f78011ce56f3ec13c75bf4. 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/USEAX1402062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fe3ec186f8f7d89be91171a43f25bd6c5c0a490ea536f6e2d04ff0da1eebb3e. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USEAX1402063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7fa830f4ce1e1414176e1c3207f221a5d5160b76d4ba94f282139ff8dd95a0. 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/USEAX1402064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76281b69f783c10ec88a1dd211ede085a2b4881eecb0da44d3bbba02b6e44ee1. 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/USEAX1402065.
Hot Cakes, Cold Drinks, And Scrambled Eggs
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5713d2446c61a1a39cbc7023b65110e7da3b204e60ca43c96eee009b04b1686e. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USEAX1301337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd19791d29f010b9ee83625564b0d3ebd2e197ef57918e62c9ab719e5f1bc3d19. 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/USEAX1301344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb730f4fa96581f6abd750d62ab0e1d97a21a8e7bf60fe60e92182013582dc402. 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/USEAX1301167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafb3d5c9b0906bef405f4404a3588d3d88b99993be7e6ba442e5ec51c986109b. 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/USEAX1301169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x301412086cca4ac86b60d52b0d78018d696b52e555df67951d96ad9c69f07645. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/USEAX1301104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f87819fc0397a02f53e6a07052463f71543fb19cdce1d4172361d9b52f7bccf. 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/USEAX1301106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74b111aca75eb413dcd3072ee009549088c2085313247ba7ce12c89cb5f24bc3. 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/USEAX1301107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x789562a5cd340da86a8a97db3476be57ada240e5298f59207878f55e32e216ee. 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/USEAX1301108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c919256795341831d78e243eacdcfe76739fe30ba6fb717f074c94503c5a999. 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/USEAX1301110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd502118ab6294ad2f4138c48df81f03da04a0c9e19470aa8ac6dffaefaf66f4. 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/USEAX1603070.