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 0x1fc0197bef81fc046aefa5919dccfc80eda57e546f9d4bd1f4e3ffbc2624624d. Chain 2 (Bitcoin): anchored in block 953768 (2026-06-15T09:30:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/c0e301f1-3904-4cea-a386-005f237dfbb3.json and https://artists.proofprofile.net/proofs/artist/c0e301f1-3904-4cea-a386-005f237dfbb3.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 0x18de155cef882750ae219a34a0eb5ab068b3df6c382fb285604fdfe49b762727. 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/FR9W12326718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d98964fbd9d99b6ce24957bcf7ecb585114699064787038b1ae24b75c0e75bf. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/FR9W12353223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe828600bf2c52b002730018e98f88a206d05e00d9dedecd317cbf8d9e37fca5. 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/FR9W12345823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd555d7dcec618b2e8347cd3d85966656cec880b664bf0fb73fd6592ca4b6c502. 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/FR9W12326717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x556f9cb646ff0d4363c933bd292d832029d4ce4842ce31fbac7790b9e62afc47. Chain 2 (Bitcoin): anchored in block 960108 (2026-07-29T13:09:35Z), 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/FR9W12345822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa169cdcb0c272ef69807b00a042e0a372cd9b28d73702cff877c37489a776b5c. 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/FR9W12326714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80dd61a920523b1d771c2c1723d0395dc11e901b7f3cfe134637e1925f14ce60. 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/FR9W12326716.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8387e34fdcc72bc6953c2336ca543ba1878f939a4861bac6bf841d34974277e1. 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/FR9W12326720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe69a49c8b628f5f855723d610fe224eac44ccf7cc23c8ee2baab91934d55f9. 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/TCAIN2487267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d98964fbd9d99b6ce24957bcf7ecb585114699064787038b1ae24b75c0e75bf. 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/FR9W12353223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512f44024fd7f811ce94550ee6fa84e06300e0b18488222a74ca24f1b2a3c8c. 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/TCAHG2396777.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18de155cef882750ae219a34a0eb5ab068b3df6c382fb285604fdfe49b762727. 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/FR9W12326718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc75ab93aaeb1a24e77b570af04fa6b0d19ad33ec606a5d0f244bc8cf30d12262. 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/FR9W12313099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48aef9c158870d53c6693fad62627e100a55a12d8e6010dc83f79024fd824013. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/FR9W12307252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc27bc6faa0b0d8efb0148a79b67557d108c6d35f078268daeb2f1fd3121a7c11. 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/FR9W12304811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bb0661dc7ed532c304143134933072ab6f31650387ed465767d4b4410903f62. 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/FR9W12249659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc39865249153c957a6e8a9158f4fa7a9e71c041fecf0c1042fc852589587b914. Chain 2 (Bitcoin): anchored in block 959145 (2026-07-22T15:39:05Z), 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/FR9W12237861.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4b1f6c415b1f7356ed19e5634a47b5dcde71dbade65b41edc38d790a6b6e523. 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/FR9W12218424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddf314c4cd136fb97ae8ec000f606aef26e0b222b28edbe1627743097b8abb5b. 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/TCAGC2205149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcff65adbdf14aa58f9d1ca87b8463cb7981ba51a067e4f228f9ceb04a161f9f5. 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/TCAFS2191303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedecc92e1ddf5b306c93b1a4c633c91a579d04a3e7f3b41ff1f4b472d15ca3cc. 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/TCAFQ2176385.