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 0x669ac0be849bcb9f7479a6ec44728ca7c7fcb62cafaafc1ed45d82a0c3a72ba8. 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/e3548806-458c-46a1-9142-788000345a81.json and https://artists.proofprofile.net/proofs/artist/e3548806-458c-46a1-9142-788000345a81.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 0x168a511a063ab8b9bcf77ba91d467baac547886f09b054163ba2cc13c1fdebab. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T01:47:42Z), 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/TCAGI2231785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x964539deb702548e4578c05277ed0599569ba150b4ccb1a44de58b5019321c92. 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/TCAGI2246895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ea69681d92ada6575eb9855b3fe68b6fbf99c78310712f6fa909b7dae191c24. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/TCAGK2209756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf89f839fafe6a015d8724afc350cac9c921379a9b87d5d296db218e6fbe212b6. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/QZPLR2290686.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b2791535281c1d672d2fea8a914393670f46ac0a76466567cc816ecdf8ee12. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZPLS2227878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343507f870b8ac83b7a677f503003d00efad188f97e4e585e40118984e003496. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/QZFYY2310314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2e2c82e781e790988c47670809ba91725f2510ae6687b40666dee19cfb85433. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZFZ22317754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2770aeac1fc3f1dfa4948f13d3997b1dbdae6d32b836cecc09d48b785ae86d93. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/QZFZ32364095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a1c59a20c4c2dd662ec072872a11d0c074c6af97a514685a04dfa405513ea69. 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/QZFZ72365444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61c441dd2eb53a0765a620307169e03a441a7eb76331136dc9e6465063914b8e. Chain 2 (Bitcoin): anchored in block 957624 (2026-07-11T23:13:54Z), 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/QZDA82365475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa4cc2c53888571a1cf31d671d8be7c897d2525f8ce6b6520827ea1fae0adaf. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/GB8KE2303778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda173b78a904534764c9fcb4c9aca446e21b6428db1c6433c67866b8c089d264. Chain 2 (Bitcoin): anchored in block 958992 (2026-07-21T10:12:17Z), 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/GB8KE2303779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c8f5cf490eca64b3d6f021561b56cc30440d639dbf638ba1aff9e2d136413. 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/QZDA82342786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x803e5402785fc5c6c7c3364b6de37a396fa0172b54982a34454e0d6fea6060b8. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/QZK6N2308569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x696338581c37f31b4498eb4a84b621b75fb46f5f396692317cde1e08db56f141. 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/QZK6P2379102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3282714094b11a4787a4e4f69a77a65e59bf26f00680b315c8eb12924d5adbdf. 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/QZNWS2316643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd7345eb1cd5b0e7c2ab69f3084d478e1a988fc355fe42a5f9b6d401833b7d87. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/QZNWW2342042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc92da91920e146804fcf8e497f0bd6c6f6f88840de7821496002d7d3ce055ef. 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/QZRP42334581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a14e48e46994d1fe44dff6d0d26b64c37c5320a70de866b90558d1dc316f9bf. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/QM4TW2432711.