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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51925c5474ddbe84cd467308ebc6391b534a71eba66a490d562174cadfafd035. 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/9c869da6-b5a0-41e3-b69d-3eb6d3d2cf6b.json and https://artists.proofprofile.net/proofs/artist/9c869da6-b5a0-41e3-b69d-3eb6d3d2cf6b.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa050baa27c94c5143cd0a7e417824b3775e4cf6793db550e16bd6c9d3ed8efc2. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZFYX2246566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e494b7af84ee971286727d828105e6d70423186b360fb5f9059252abd5f021. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZFZ32416825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635b896892354a1533e4c3339380be8c3358001ff387c07e9eb40fe68fbdad1f. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/QZFZ32416827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7400dfb7bbbe3d4a7debf6363aa1ce7b4e3add2e2938228c02a0f3d77438ae4. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZFZ32416828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a5a35c72c6ef7825304a360d8545ff7e3c63060c5dbaac2e4058460679119. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN42428466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e227d0c520c3e2e74d815b25fb9cf113d52bc2e6488968f4618c88a0639fec0. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T20:50:17Z), 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/QZZ8A2433360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5d4ca6730a162a31898a872b6bb4a50455a32f72dd063fc58d5614c0e388c42. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:35:25Z), 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/QZWFQ2429301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2a7b28958e6ab494bfc806097dcc09dd72dad7e9b084a5faa0413ce360f8cec. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZDA72502791.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd8f4b30d4b87bd43886f46df4c9e14c63bc0cad9082a6fb6558e0438f8b653. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZDA72502792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cd0f5db33ef1a7c32e307b716e5c225d8d0944455989694cd9e62adbbeecaf6. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T14:25:35Z), 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/QZDA72502793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc58a5a35c72c6ef7825304a360d8545ff7e3c63060c5dbaac2e4058460679119. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-02T21:02:00Z), 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/QZHN42428466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f4a06bc9668bd3334786bf1b3fc64ff24a84ee68d87673dfa1b535fb240ebc. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QZDA72502796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3e32c580fc869d7b565f7bf66c997a6b9e42e1b1498f07f62038111ff20983. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA72502800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e227d0c520c3e2e74d815b25fb9cf113d52bc2e6488968f4618c88a0639fec0. Chain 2 (Bitcoin): anchored in block 958907 (2026-07-20T18:41:40Z), 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/QZZ8A2433360.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe587aeeb4aa7a60724c953bea1ed13b4e2c76d0f8f6619c4004fdbc4d6ceac7. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T10:44:18Z), 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/QZDA72502802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ea1df9a3314ab03ef8339abbf7d1b92e744d1add24efde0dcd2fd8917ab9331. 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/QZWFS2509721.