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 0x4c517ef1dcfcccd7f60fd1e2b40d6ba06c6796c5572aec67c88950048ae358e1. 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/dcc2527f-ed6e-42bd-bda1-0318780b036b.json and https://artists.proofprofile.net/proofs/artist/dcc2527f-ed6e-42bd-bda1-0318780b036b.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 0x52d08df6dffc25ffd085a42cc3c401684eae9f5d60b88ce69ebe3283d68240c3. 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/EGA252107667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97ddb9ec00334d2e64f650bf13662623ad0f1ba691a388643aa32733c8be2c1f. Chain 2 (Bitcoin): anchored in block 958075 (2026-07-14T22:55:31Z), 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/EGA252107656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a75ec425fb7a8ec6bc837497d7090a17e1c1342b6a2a592b8c6cd26ab2e7160. 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/EGA252107651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a14f55524c53c226ccd2e0ce0c74d9f5fdeec929bbfe342bce18f3c921236b6. Chain 2 (Bitcoin): anchored in block 959094 (2026-07-22T03:33:16Z), 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/EGA252107664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1c77d7fba6788322126ab0134ad1fcad33010b04f7c39026e5fa3ebe3ef719. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/EGA252107654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8962edc30f9b99c090d01377c98c1794228e3ec98842f2e82732dd3c02fc7825. Chain 2 (Bitcoin): anchored in block 958913 (2026-07-20T16:58:47Z), 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/EGA252107666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf99fa2e6da279e59deb70cf9d32913bcff021e6ac869cfe0eb411d4bbd639d07. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/EGA252107779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba75e31502f26f212129ec55ae5cd25696c6bb23c874e482f2223f5e12714064. 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/EGA252201434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfe854d23ac8851991147e5de28eb841fe30a0d40b5df3f5edb51f28aa7e0a68. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/EGA252203474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x008dd8dc0c556da4f9e2d29311754052ec6f6f40eced9c1ec5764d6a19b5eec6. 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/EGA252204467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x818a3bcfae6cefe037c72ab8037e5aee599b871e178796ef79c7a738a639c79e. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/EGA252205196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x879a5246e267bb8e778d3f30e05dd4dfb1654f1f32669226275a38493e6a7934. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/EGA252208163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe66a6cff20f715c7ba682fd197bd975c125fa4ff62cad7906b706f4f2be24b3c. 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/EGA252209585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa984980caf3c9ab0f1b27f4eae030d0c25b58886ccc40a0ff29d550a552ae712. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/EGA252308506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x723d7c0cbef02c445ed7adf4ae673299561467b13f9389dbc6b32c26bf05bcc2. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/EGA252311949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c485a80ca252c9ea51c76add90e4938f1cff2497b28214a91752d43fabd119. 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/EGA252418027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe38e4b68362aa8b4ff39b6588ebb40e1502fb7c98966702da1ddaa45f7141b9. 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/EGA252508572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c337d5f55fdf9e40b239795836ee32b5202ef2283f0872baca63814be185290. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/EGA252509615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e78448812c39d64991474981282ac94cb3c8aa1cb89ff56b57478c685479069. 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/EGA252509851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dbf43b6e94c6430929ea621cff283a01d5753fc95fb703de5964e6560b4b89. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/EGA252512246.