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 0x760f8a99d62b22f7e4a21e6f3b803575d3c30b705459fb1a64cf59105b0e3b13. 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/86cf3f21-e8e5-4041-a9c0-182ed3ddddbc.json and https://artists.proofprofile.net/proofs/artist/86cf3f21-e8e5-4041-a9c0-182ed3ddddbc.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 0x19c83daf3c9b0f7e323bcf10bd90c37ae3b8eb11558a8380416d39cb150409a6. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEYOK2315584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48a717eb52584b64fb1a0e4c8e28a71aeb584eeb522214a96c7ed400f5ec52b0. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK2315585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51db89c66a1790f2bad10e83d442bdb1e5af15ef51004fa185f297f228c71d36. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK2315586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0599f1e31bb7a1cb5c37f2715c29408303024524ab5708cf62f7435d92ff1121. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SEYOK2315587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7666db76b8542577ccdbb46960e6dcfb4a2b4868bb74d9f036d4ba06cd85b05d. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/SEYOK2315588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8bf46550f0c7a71aa1c93667d9cd657ca76c21341947796d8c1b272068b51dd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK2130413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf63eb760c4ba4d25b26e8e1447b548e1963a6f73a076c3d5cb3aad00d90c3895. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK2130414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dd8abbb9f777f97b2c4eea5a82aa5949b65711dc57a2a61ecbaf996cdc3a0bf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEYOK2130415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5744ffa180978f942d396aadf376f0abfb8ed4ce457edbfe75a6d91162863ed. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZNWX2426452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d727796e811d82fe4624afb29b0cfa25d7cacae475609c3bc022c6375d62821. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/QZNWX2426453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6382e5a0aa63c2883b8a75e9581cdc9e86fa33567d68c3c88b11910c8cef95. 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/QZNWX2426454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e44a7ad20873b409a9b66a59cdf6305eb4264dd8fa3bf70ca46702f15acfab8. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/QZNWX2426455.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6d5ce12f8e1d0f00337a3c4df406bdec967c2be82570eee8c0cb6ab7c85ab5c. Chain 2 (Bitcoin): anchored in block 960314 (2026-07-30T21:00:46Z), 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/QZNWX2426456.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff5c3c25504629dbab5e052d15f8209e1ebebdd2b359c4cfde28ff794e69c72. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/QZNWX2426457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6a014fa7c7bad2847d815cd532c3f18b151e3a8702084046bd9254e7368607. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/QZNWX2426458.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x607c5a186945d6dd6811616aa0e38fbcb92d6ec69581bb7f455cf13a2d0e4125. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZNWX2426459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdf4381ee0edaa1eb94bd42e3c5c516beaf833b88b53a646c8483e0d2161250d. Chain 2 (Bitcoin): anchored in block 960311 (2026-07-30T20:45:02Z), 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/QZNWX2426460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x265e1618cdde4c722971a413fb816956a7e5fef7dc144c22ebd27b2f36f63484. 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/QZNWX2426461.