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 0xdea82198aef6da9987e895fc2df1920ccf632bf9bfd10dd0510190f926c08102. 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/adc4dbea-0866-4c9c-ad8e-06fe9d9ac719.json and https://artists.proofprofile.net/proofs/artist/adc4dbea-0866-4c9c-ad8e-06fe9d9ac719.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 0x67a93f685428c00bfd7993b2b03bfe6e49d01b6e988796245a63c858dbc38350. Chain 2 (Bitcoin): anchored in block 956425 (2026-07-03T01:28:11Z), 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/QZTAU2166906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafa072f7bbfa3766a055d645f06317e41fefc71256531d12b2132220e7ad6823. 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/TCAGH2219072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1ead8eb877577dc5b52c30c400965e7955342b252a1ec8b7d995b6351e523a. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/TCAGK2290772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19b9685cd3932b7f2f69060e0f72b31f7a94423700537b93556b2db269c42494. 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/TCAGO2224867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf558f6cb25047d6b726745025a488f06a276f12028f427496ec41a86d1751f3. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/TCAGP2219398.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b7100b75cc54caec291b27bb991271bf83bf58aff81de56244a20817543f494. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T02:57:30Z), 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/FRX282326929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cb101a0ea8f4dc2708472308c72908329fa8b6feb13810f245ddd75c1713e4d. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T11:07:36Z), 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/TCAHB2332617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc01e193998332f68e441ae4d276412effdb9e4abd509abda7b4ba9317eba99a8. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/DGA052302797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49ff3935688287fac122ae4e33d4bbf831b534ff24c0db2d6dbe7a2e593f575f. 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/TCAHK2399466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47779a6a07bcf18aa00839ea58908fe5c3a041efec6e6c4b7e0715557d0f1784. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:26:22Z), 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/TCAHS2335832.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a9d421a8ff669bc9f5fb6374603e2ec754bb74b360ae83d267646b5c442a0a8. Chain 2 (Bitcoin): anchored in block 958817 (2026-07-20T03:52:09Z), 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/FR2X42454347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8b16cede19668cd03851a3883427a3eaa2962f1ae6fac1f0d1f348df31acc2. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/FR59R2421191.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x620203f0b9d3e8a8da014c085a6a3f0a3e883b05a4288991eaf024cf692e98cb. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA062402769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5790d96341d23a652e460891ef5a7331ff0d38f1bcdb42e47791427012778a9. 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/DGA062402770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc16cbee24017393cd8afb437d37fc0a5c204c8c77b5d098fa441337152ca9e0. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/DGA062402771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x664502bd495d97acb78b99ad51c931c27e918ad9eac2b9bb6ed171c5f2fcde61. 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/DGA062402773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2032194f4b028f23973f7f86c19d58e8f759e9d57b44bd5e16aef4dae8abacf1. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/DGA092420538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5863bbe3dba986610eff27dca5eb030482238b3cdc537586d195fe74c15cf080. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/DGA0H2426128.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x517ad722e03982483d28b3a68e3e12a276dc8903ef25aa2e85b09be8ee696b9a. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/DGA0L2474192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaa53def27823d7ebad070ca4534ca0c06939b3b639f57b254830ecc52384105. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:54:33Z), 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/TCAIW2415004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fd89a6625c2f6c848ecb970969b7022a4f11bc81a5b20eecddf49bbaba5c291. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/RUAGT2520388.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d1c6bef734085dbb66c1439e26acac20156599b809755baa0782691ecebe3f7. 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/FRX872513755.