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 0x211c1407197f75344464c4d007ec755c6c9c7f873c926ebe1335e63102093faf. Chain 2 (Bitcoin): anchored in block 953657 (2026-06-14T16:43:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4f73418b-ea91-4528-9240-32403b087bb6.json and https://artists.proofprofile.net/proofs/artist/4f73418b-ea91-4528-9240-32403b087bb6.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 0x89b1c7544719d3262e8a6501166478f4d660a52c8507c45fecfb2ac2f250d887. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/BRDI51500319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb21a35645aec658c999e0bc60c99ceef0818222dc31a3bc239b3340680ea33fc. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/BRDI51500320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23cc09d7af617223c17313f5e7d8fb12905d71b152b9204592a0cbbfc5213f8. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), 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/BRDI51500321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e122b09727d562ac9a8fcd4c182073d7f3d188bc6fbb34ecc5071fb8a2cc2cf. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/BRDI51500322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd02ff2a2ca4e1c7de8d159415dd758944486209a554e2e75f411bd0d04a8c6f. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/BRDI51500325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5690aeef5491e458b5a8deae171446bed02b5c9dcdab652ba7d524806e4d405. 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/BRDI51500327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37bb19a63715d6c0099886a0eb29301395936da372070b93ca976b46bd32ad5e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/BRDI51500329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe02595f11e0d0e6c03d81ded737fc72fe388857c2dace35598d4b55c72f69bf4. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/BRDI51500330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5d58d483a48c2d99ead68f4533e1af04bfc97afc2d6b0ecdbd362806293f91e. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZHZ41978263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00c568917cad852abee312c4bd9673b5455fa168f23ccd98e90fb48740ae2afe. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/QZHZ41978264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf33d32bf3531900e03a095798cbda0c6773b501e7756895a072c179ed7beb7e3. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZHZ41978265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x916d84f782e9551619dd20f3b04f2bf808c0b9c46d28912ca03a252e10e97a42. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ41978267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c623120ffaefb325deb197c9365b76f921ba8a39b0123473464c1faf74be289. 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/QZHZ41978268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8a108d34a33f5019c44129528d90c4b32c241a08e3427fdaab456f2083d0121. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/QZHZ41978269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ef0c00311aa5b22cf6e11cc7aa7009571d4f4a40279a7a7a8d68a43cf381016. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QZHZ41978270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcf66d753f67c9dd974119efb1b3da0edb04d4d27038643aee97527dcd3e407e. 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/QZHZ41978272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e193165ecc96bab2db26090a3914217fa290a2cf1aa3f8a7a9c846bcc873b7a. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/QZHZ41978273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd920c5a6e629466dbb5e59c2a28525ff0cd603282fa4837605b80ff25ca59101. 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/QZHZ41978274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a04c278ed38ab80b70c268da3f2f32d17fd4538ddd286936c6fbcffb9ebd28. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/QZHZ41978275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194dc7941a466d5c11acaeb508d99001aa285b96cd0d0f3d9c5d1c654caad07e. 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/QZHZ41978277.