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 0xd64681f742fddf41fa1aac7e2a0a8cea00fb3e5afe14c2da7e876a445f48306a. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d0f05868-65d9-48fc-88df-1d78455df154.json and https://artists.proofprofile.net/proofs/artist/d0f05868-65d9-48fc-88df-1d78455df154.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 0xc5adfcfd216e739a189fe05781b3fc77e315c6e3af0ee391d590322f54ad0d14. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QM4TX2493022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da3cb4b32ee9cec0f0ef50a53fd7a00de49279d22bf933875acc52f777b6a86. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QM4TW2484862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f3320d94cc40b55996ac33808952cdcff8a0cf28d1d99d3fe344142fb2ce5. 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/QMFMG2324774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c04f6ce538115e3f9c87b58608c3701e54c2c7c28fb82ad44c7d8774a6b7873. 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/QM4TX2493023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f21ef5e4c1b8bfd5060ff22016a84f345086f2652f0ce46b695fe79dbae2e6f. 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/QM4TX2493024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e791a5e25fd26ffffafbbc54dd6924036a896d2030172a45fc57cc231114632. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX2493025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7943d4414868cd92e3c1fb9b33e0ffb34332f3f3e20d60b4b60c83573e3dce7. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/QM4TX2493026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb910cb5132af38f57140e359b1e794178cb91bafc9873b5e33777511b5f1ef07. 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/QM4TX2493027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa82cf849daf8ef3120362291e53e716a9d28b2997576dc223b52bdd998806a83. 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/QM4TW2415014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e576f12e238ae8e46bdff2cc85420ef1640354f0b26f86070e0ed5d8835e37c. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QM4TX2493029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d9c0f6fd99859870350008ab5b3cbae73064a2ff444345a4257793d0f760cba. 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/QM4TX2493030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9784c6b0a4820903fa98ac053018c0e18f5726ddcd93454f7a68655de1fd8462. 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/QM4TX2493031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85b7a56e42ae885543e9d3a6e28a1749f3dffa66073478d4d2ec686c6488b6. Chain 2 (Bitcoin): anchored in block 960210 (2026-07-30T05:21:45Z), 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/QZFZ42511496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c4936d66faec95aac4a9b147b361edee7bdd12e0eb43f5f3cf503a5212c0e0c. 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/QZFZ42511497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0232526b90c000d11ff275ff3ef164227b1e54ae00747d00cbb9f5cfdea0539f. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZFZ42511498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e3fc7d4592f9e308f9a8d2c86cacec5e8dced852e510913795c3acfb23b7abf. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFZ42511500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba85b7a56e42ae885543e9d3a6e28a1749f3dffa66073478d4d2ec686c6488b6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/QZFZ42511496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a989f780f17d11fc7877f0f849b9554375973627164f912d25fc07e40a9d87. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZZ7Q2479949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x154f3320d94cc40b55996ac33808952cdcff8a0cf28d1d99d3fe344142fb2ce5. 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/QMFMG2324774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe81d84e930b5dd461b6ec321b0cad5708512eb55f80775778bb8d8948bd08a36. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHF032404990.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20884519d676859ed05a5c8ef32f3818165e082d7240937a78c3b9a722bc4a5f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/CHF032404697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa03c4cc82a5c2ad4386c2bb7df15fa45a116d4399f19c810c88da2eb7f6b3143. 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/CHF032404994.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4812c91c4e77ff0ea67fce4d430e9c623857e04f37ee4753df991d19cb47d0. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CHF032404625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7388ccd24de785c5c4bf723f2a0c5e7f35b833de285c36eba3695146d23ee595. 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/CHF032404997.