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 0x91ab9ec269e52d3f7b03302c3762401e41a92eec1375ec365dde3525066866b2. 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/f6c0d7b7-10a0-432f-af8f-6bacaffcde80.json and https://artists.proofprofile.net/proofs/artist/f6c0d7b7-10a0-432f-af8f-6bacaffcde80.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 0xb0388395917ee60243d67d66c0692cbacdbc8c221bad42b639d8f1a89f7b4d6f. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/BXIV82439193.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb86f2916f96f005d3304d56a91b9beccec9c114a5d89fc87757888521de13f3d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:33:09Z), 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/QZHN92476467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97215d723c692c397bb38ad474faf4a00b730e8d57ed58ba501a09f37c8de4dd. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/QZHN92476767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92af81d3be75674496b0ceac802b64d61af17706a8d8477ae76691eb7fc0d7ec. 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/QZHN92475443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898ffa15b5efa6574247beec5341af0f8d14ce3d82121c0748e84fed8f6d2d74. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZHN92476627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25dba1351440e4b20664f68a12fd2d6ec839bb932611c650f79b9ee91f054557. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T22:17:24Z), 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/QZHN92477004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8377839536fda6da29008f066b5a90ce3d5a7cf56053a25fe0850fdcf1077130. Chain 2 (Bitcoin): anchored in block 958568 (2026-07-18T15:23:47Z), 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/QZHN92476631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d43426ecd7edb6979bd555777d570fa495ca447ac1615a29834df252fa8bc21. Chain 2 (Bitcoin): anchored in block 958734 (2026-07-19T12:54:58Z), 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/QZHN92489571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdef507f048310ff325117f9a1fa8cc770969f9390555e6634bf5479c3028686. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/QZHN92477012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bf5e00da3b18ad304124b6356ce0771e96ee6c792427d7f22106e5bc4c8246a. Chain 2 (Bitcoin): anchored in block 958341 (2026-07-17T03:53:10Z), 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/QZHN92477176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f222e5f5df99e4a8acabbafee5d8a6536e7c32e232352901b6560c18092573d. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:06:39Z), 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/QZHN92477204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60d38c3121498b07ef4e30b381d4bcdfb32d287eb0624656389e7ed03a4d5c75. Chain 2 (Bitcoin): anchored in block 958827 (2026-07-20T07:32:30Z), 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/QZHN92477126.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266388f0083b93f9b080be090668ef5c840c9d17676b8c364161e07fba0b5d21. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:22:58Z), 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/QZHNA2468142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c04ea65b099eb09808ea397104aac5e6b1102ac77269f808a92bf9e32e70003. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZNWT2479132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d50502f72d3720149c7e29f7ac058f39c7cb2b5b44e157ff1c6209287ae895f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QZTAY2452498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x169915b08aa50764a54eeabf31f0374b76d6e76cc599db7ef5ca716b00448508. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTB22449806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13fe02534ea22bebfb0daba7c25ebfdd9a7568e709e335ea9e0801984be560a0. Chain 2 (Bitcoin): anchored in block 958087 (2026-07-15T02:56:49Z), 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/QZWFK2496519.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f8d5c14a0536e026de2bf781715cf5c14db85c76f158e1e3054251b888ab884. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:56:14Z), 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/QZZ7K2465469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcdd4f464da0a485abf386a6bc148298761a0ead4b5a5cb05c41e864858170605. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/QZZ7U2426775.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16cdc5589a63360d546873d971d16f557da685a794f0b60e5f785ab601291fae. 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/QT6EU2550416.