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 0x37921a96a831eeba963237a21fbe99dd638bc1f3bdbfacc2130b9ad50649f120. Chain 2 (Bitcoin): anchored in block 953733 (2026-06-15T03:12:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/96079763-01bf-4f0b-8f2d-18a8832b55de.json and https://artists.proofprofile.net/proofs/artist/96079763-01bf-4f0b-8f2d-18a8832b55de.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 0x538a6ce7007bebca22bc1facb600e303e480dddd926f6e28cb2b025607fddaec. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2448299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8bec58a0960baef425aff6b8ea5741569929f954e5a27f1704c698ed44c273. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/GX53U2448300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed050c1d43d4ebe659763a38e9429f2297fccbabd9043e5d0799aee608c8911d. 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/GX53U2448301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16e2a8ffc9763413babef06c1428126ed3dd39176cc05dcf46d0214c9f714fcd. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T20:44:14Z), 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/GX53U2448302.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x180bb44dbbfe0e10b53fb14d6bb6004af14eb36500cf3e91e855c90e0367f811. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/GX53U2448303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50818024736691abbec73ef923b8423d909e8bc53ea50dbdbb53b62d27e0b048. 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/GX53U2448304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357023dc51b9dbe2971594670662b26c0a6a997bbeed8eb2c166b7f7201d99a4. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX53U2453545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bbe124d4a4e78c5a8ba78672d309ecbad1feddf6e1467efb48e653a4db56799. 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/GX53U2457127.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f6729a12cd9bae22bec5f1cfdcbc9938b6804cd68cf30f56e0fe0d5163d09f4. 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/GX53U2453325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xace7f3d4a064042f74d1c56c30eac9a96015d7749c304869a45d69a3267e8db6. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2453326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76d5d20cd15a556717b83d5b48d44f87bb60f4e76c503b1067a63d9850fdb818. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2453327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f6ed73842c163c886d026fd1b20a98149350e0439125c420530f3083018c1a6. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/GX53U2453328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4a6132fe20ee7e71fbc2795368710c2dfe4a57312048a43a8dbd0a5a6e8a8dd. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/GX53U2453329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7512cfe0f3b8032206071671b613f7f679cefda86e7b339fd1abefd30646c0. 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/GX53U2453330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f414c5448cc774c8f03a5ef6632349dc9e0d02a929a4d66771c285feca8074a. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GX53U2453331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x146e16798849a343079d3fda18dac11a1324d3ef6d477016958ce0ab8350348c. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2453548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef2b84095424f2db43bbe1771b6b2627247dda5f3197888683009ae92bef2d20. 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/GX53U2453538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1c492f84d571cfa6339c1518ceda5a88e5d1a47caa50411741d8e0396465ec. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX53U2453554.