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 0x15a84ed4edba2b20fea2c60f955e03a76f0fddecbb3cc5da40a9b9eee298d509. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/66dd5725-b8a0-423f-ad36-c330e622ce57.json and https://artists.proofprofile.net/proofs/artist/66dd5725-b8a0-423f-ad36-c330e622ce57.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 0xf237b259554277040ff020c56d6280b581da348355278fc9df54dc1798db7665. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/GBKPL2088184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc06cd41b6a422e1a7878794f9e46d7bcf7f83de5c94ea22d57fdb65c748bbef2. 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/GBKPL2145104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x422391258afde077fa304dd1d753a3d8c7108160cd8dddf15a0cc14ddc7a9ba0. Chain 2 (Bitcoin): anchored in block 958134 (2026-07-15T11:45:20Z), 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/GBKPL2288108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f0cace058efc3561a20b8f19ee582ba04fcc503ce0f84cf19f3c7f0e8c186. 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/CA5KR2261160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67d73e2742160c6318e0195394fe207b2fd55aa45a5c312cbc328d248857a780. 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/CA5KR2325273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c0c79a6f04f917e17b866b41e850209814017470851d7d58984252a8b0c69f. 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/CA5KR2271913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba4f0cace058efc3561a20b8f19ee582ba04fcc503ce0f84cf19f3c7f0e8c186. Chain 2 (Bitcoin): anchored in block 956383 (2026-07-02T18:11:59Z), 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/CA5KR2261160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bff19c1ffa8b652ddc85f987d6a38f4f95f02c7fe07346d4232dfff19c3cf66. 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/CA5KR2319046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb057666a9eefe1f34f06efd1ab7b4a48dbbbfcfa8c3cda584644b483c3a10d63. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/CA5KR2325275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b78ce37ad5e697931319eafb6459caddc3e01f91d165ed8b327a24896aea6c. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:38:28Z), 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/QZTBA2308929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc995304e82da7e85f6bb48f9b2a0ba8749dbf1327d2fcfe7323f743049a4213c. 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/QZK6L2462713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed333282f62369543380b788283149f27067943a8f6e92568b118ce850c402. 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/QZTAS2448490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabed333282f62369543380b788283149f27067943a8f6e92568b118ce850c402. 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/QZTAS2448490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96d20e5314fa4dc8f8aa86c7ba5909c83ec685694fefa9930ed90c1e35f03f6e. Chain 2 (Bitcoin): anchored in block 957880 (2026-07-13T16:39:18Z), 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/QZTBF2495157.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae7c706aefca9e9e8f025867117bd449b90a2aa464fc934fefa37a089323a336. Chain 2 (Bitcoin): anchored in block 958342 (2026-07-17T02:21:38Z), 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/QMFME2509065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f553a57fe61700fdb17dcd4589558703bcf831d4e9b95775dd510ab7770b967. 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/QZ8QY2200022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6283c3d9f8b26a614b9754fceed35753fdfc0298addf6d0f987b945185d1295f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QZWDE2257111.
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 0x74dcc8fea50ecf85bdbc17cd2b0542076ab469f550ff8382b0453c2efcc92580. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/NLE712200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab27929c1d635630c013215614aa950d55ee486040623e58b35b11899c514964. Chain 2 (Bitcoin): anchored in block 960212 (2026-07-30T05:43:45Z), 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/USUG11903328.