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 0x6690bae7c25d37559d11dd11bb32ac2fac02294a262c985f71724691b224fee6. 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/916b2861-2e34-4472-a5af-1b40af0aecb6.json and https://artists.proofprofile.net/proofs/artist/916b2861-2e34-4472-a5af-1b40af0aecb6.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 0xaad4a0fdcc9e44acfa24d33e27f4b33f391412fe212d7533d0031bf64d7933c8. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T20:12:32Z), 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/CH7811929042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58a14bc0f5bf2b16fffa21daf1dce7bfe4b1dd9841631072e62c7a2d20719593. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/CH7812050961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8edc057e28433b3bedcf89a7c14d83593af3edbc9bb4792da96c26274e074da6. 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/CH7812055935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc2ec499d9056c0bf427d3b249fdb471bae157b897698ea93b00b81a9a9508af. 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/CH7812065234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x671514b00f9d8c81aa4d7379bee1cbbda6e7f26a55c6be977ffe84c8b280c04d. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/CH7812181114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85e5df985055f1c1ea960a0531501088ccf91bb13a94a171275a19ead8887afd. 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/CH7812181115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x437450e4abe0f808dd962710e5a1bacec588d1d919bbda49366e061fbf150b33. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH7812103355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe849a69f845d509b3cd5d1b08cd6495aee9e32956c02cc903b99775f8c962231. Chain 2 (Bitcoin): anchored in block 957898 (2026-07-13T19:28:48Z), 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/CH7812108067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29b0bd91e804a30a213e863b424c16dd4bc728c6f73d9bd0ad3d53756e4caf5b. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CH7812214375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2998a4f677cb04e4ed6caa7d4dbd79b45a1a20a5c2c9fea851e1c1d4677413cf. 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/CH7812213962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4165530fafc0d4980334027cad56eff86b014317d3106af138378fd166c962c6. 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/CH7812220547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00ce673413012774cd03bf2fa2bd387e53bd5acedbc75e42ad6cce130109d85d. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/CH7812232597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77b198270a90d1820b83470dba4f596c3246c5f17c1b75677bc1421d9449b5cd. 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/CH7812239361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa32e861eca19a760164c514c4fb04b641e743f03318a5ceca8e2e81ca82321e8. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/CH7812349402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5cdfff8e99e7afc7e24b275ec697d384b5ae454b7a5077f59915fcd2dc6ba5a. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/CH7812372314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7b8c4da8ad566dd557855b3515d96bc1ab0d90f38c31c8de94061b3da7c2f52. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/CHF032502452.