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 0xb98e8913660d3d2927854c789b90861261ede4e62a32d83c5c06a899bd3ead69. 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/15a00bb2-4978-412c-9423-fa2fb7c689ff.json and https://artists.proofprofile.net/proofs/artist/15a00bb2-4978-412c-9423-fa2fb7c689ff.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 0x84ca6397bbd36d7bfc58e53f3260461f10ef4ba21b4219e65c2495460aa65a72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5992e114b1f3cdfc100f4afbfcc401188af71316badc64ccf41068a305b850d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5ED2101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25525b02e8b9aa7f8c139bee99770aa18d7340ff60a8d86cf106db9dbbb0565. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5ED2101306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9844e6f8fbcd327a6312663ead911539c258587a234a75600494cfcbbded4759. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US5ED2101318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295e3a698dd423b25d722d8af18a5105db6f0412dce6012bf5bf328687dd4161. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2654554e08e50e9bb41e02f58a50a27c682d8f4435a604f11e64c01b44e56d9b. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeaeef04e95fe2b07986ccaa778f8a4f277c3045920d16afd91854df17faceda. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/US5ED2101310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794ae32c7c92822d0c6cd814c7138bd9f6c55108de01eb9406a5e4266773ae7. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/US5ED2101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbdb569f55138d22db935bd92b48d4d97916d9a8fe550221488df596f1bd8276. Chain 2 (Bitcoin): anchored in block 960170 (2026-07-29T23:52:38Z), 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/US5ED2101312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f7f05de17e3a5dc61d3cd11560d58613556e3f16eb0d80c064759d4a6e201a. 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/US5ED2101313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb557d46c8aeccbcf1e9273935d658e48e053b4527f35845ee3bcc5dbae7829f0. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US5ED2101314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435bcc185717855b07c375ad66430d0028d97d03487a45494766da3ad6e9941. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US5ED2101217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62373918624d9b8330effa75fa227d263c0c6c2ce79aea5a5112393bcdefe39. Chain 2 (Bitcoin): anchored in block 957032 (2026-07-07T11:43:09Z), 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/US5ED2101315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbccfdd41e0b6e59cadb3ab551822bb90b26f154370d3e3fd9573ccdc199ea6a3. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/US5ED2101317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd292b6a36ff55f90b4e238b77d399d81b57cdcd60989457c0d4b688bd47734f. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/US5ED2202205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc73557a5300b6dec386a9f2f1658254598cf598973328864680b5d09f5c7f1. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), 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/US5ED2202590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3abbef7a851745306c4407e072ae2d2cef930013cee3120233e69cf4d564777. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US5ED2202588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5992e114b1f3cdfc100f4afbfcc401188af71316badc64ccf41068a305b850d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d8c33e12145fc9e831a24d9bb51214f4817d1d77a1938dbebab3b1d145f67c6. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/US5ED2202589.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25525b02e8b9aa7f8c139bee99770aa18d7340ff60a8d86cf106db9dbbb0565. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc73557a5300b6dec386a9f2f1658254598cf598973328864680b5d09f5c7f1. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/US5ED2202590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9844e6f8fbcd327a6312663ead911539c258587a234a75600494cfcbbded4759. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US5ED2101318.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd292b6a36ff55f90b4e238b77d399d81b57cdcd60989457c0d4b688bd47734f. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/US5ED2202205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x730839ffbc326d9552c2d978d18a8ffcd94d0e8040542d031c1de052e53b6695. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/US5ED2202591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc1582264398fdd079ecfb5a0e1d4537a4f9ce4d3291eeb260604c1261718cf. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/US5ED2101486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f7e0705048a0c9d9feccad4882965af32f00a62026ca464df805dc0dea40448. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/US5ED2202032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6586e839b675ad0ef85471190791156137f8876f436798652a77881cd48d4bc5. Chain 2 (Bitcoin): anchored in block 960370 (2026-07-31T08:38:45Z), 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/US5ED2202592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb794ae32c7c92822d0c6cd814c7138bd9f6c55108de01eb9406a5e4266773ae7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/US5ED2101311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9435bcc185717855b07c375ad66430d0028d97d03487a45494766da3ad6e9941. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb62373918624d9b8330effa75fa227d263c0c6c2ce79aea5a5112393bcdefe39. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/US5ED2101315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e93dd28b3e7224c8ed0dac3a9caf68f3ccb18d7668e30e847ec9f80077e1346. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/US5ED2303521.