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 0x61a5acfef879d40b60602e627196f6d022bd03581cb38159a3d626b74f79a48b. 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/672ff7b2-6c93-4119-92d7-317b0777a528.json and https://artists.proofprofile.net/proofs/artist/672ff7b2-6c93-4119-92d7-317b0777a528.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 0x18e57bea295e8d27a26f1217970bb88ae6e267e8c502793cdf4fe950401fffb3. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/DELJ81766466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30e9805ca4211c6d186c78814db3897b2282facb01ddecd5aa69f1376923b1a5. Chain 2 (Bitcoin): anchored in block 958822 (2026-07-20T04:30:07Z), 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/DELJ81766470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6957093f5d57e0a15094269bd56d2408626ee5fab04d91bb9b2456fc0d71ed1. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DELJ81766473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc28bf67a5b9d6fc37dd42520cd63b2cd41c3f470189087d89d88dea89d6b7f57. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/DELJ81943276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c719c504916c3f4ecedac452bbed309a94be7391b83a41db3f61cf2ec922c38. Chain 2 (Bitcoin): anchored in block 958124 (2026-07-15T08:13:46Z), 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/DELJ81955110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12fcb61c70b211b380aaf1a3ff1b11614368507028a5da096c5e08069036aec9. 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/DELJ81955111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b286ff645f76f6e713bf5d99c753994911c976e7d4dd941b074f3fd02f5e393. 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/DELJ81955112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd883f006d6eb6acc9f34cc88891e204c7712bad847628ae61433ec2995f6f846. 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/DELJ81955119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e2199145068d3ad74f13dc183985a9e9a4f03eb2bcfd6d56681bc6c6083ee24. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DELJ81955120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x187e5f930752df0e92634174cd2a851d0b38cfde602e6deb1705b091221eacdf. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DELJ82010566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd99e93d98be3c35fed9f415643aecfe3ec4206f7efc16aa4495957278e359e41. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEZC62122091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da8f9e10ff155d042a813e947945ab1194ec3516f32b2700937e76d7f20b79d. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/DEZC62122092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x897351ee03f9fbf52e87e9085ef0c62d0879cea374098ad37f4e1b1914410e2d. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/DEZC62122098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26067b2b3ae85eb64305c231aa2d676f07697e8609a1ad7f4ca1949f2d2926c8. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/DEZC62212175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabbde43947440307ea83b7ef9b2e01996f7401f2fc69eee52fcbdd24432066c1. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEZC62329037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1771e6081cd5467d3db3cb95b671a235833198cf7a8cd2938f89df49285f2ee. 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/DEZC62332785.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e6377f0decb787f7946fcf769e5230675fd11e9aef28cac4d7834e514c579b7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/DEZC62340540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96fc0a4d41ef670c25f0b2347dd63191d7a62eea548f9f2e07d2c4e3420cb47f. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/DEZC62348423.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c3501a350b42dd37cc4867a5a600a90800be6bd7782031ac16826b440b0d30a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DEZC62469240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x748a998f7dbf572772666096e04cafe6a9911a24091237b5c7cfc5e0ba8acc20. 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/DEZC62573283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x850539b0cbb858fd2cbfe5c69de1ba1fad0c914deb01170b2546e5ba57b2bf3d. 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/DEZC62592416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94d9ee5226d9e00d61f27b107a762ba8e4d9e9290325a1df0eb3fa1afffb5bab. 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/DEZC62594977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ebc6732b31261f2ece17b7b96df06535653724f5ee5f8a3682f6424e57cbb1. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/DEZC62588486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03c157858724147c43f4399e31a73378ebf3bcbe02aaae4cb81422c0330b47aa. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/DEZC62588487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a0f924cc2c0538f11e780011f33839e202cba546c1832a181e4f9aaf406a16. 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/DEZC62588489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4d84ea292c81ec6164698c7413289d61a1da4eb5f96c022233e1963523bf63a. Chain 2 (Bitcoin): anchored in block 958850 (2026-07-20T08:32:30Z), 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/DEZC62588493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d8c82d6b4d6757044e09c47da6d5176825ad55612e240733e445f0636e90678. 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/DEZC62588495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86253469a9ec2ff0b34af1be440766a9fa46e99e352f26beed3a594879dbdb3. 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/DEZC62502978.