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 0x971cce465df7acd15b3d433aa2765c90cfb2365b3ea6fc95b3e4aabc924a803b. 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/03aba3d5-6f1d-4d07-8604-54917c7a20f8.json and https://artists.proofprofile.net/proofs/artist/03aba3d5-6f1d-4d07-8604-54917c7a20f8.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 0xba30f5a9de1c3d0d0dcd20763d01a3ac0ebd673f43d802097ef04307d5cb7bf8. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/NLA950300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c80e04eda5eeac8e96bbefe255bcc510267ad3b4f4ebb3adce37a3a80e54d0d. 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/NLQ270600060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfe771bf3eb7bb0c72338e45fcba1930e15eefd2e92eebd413bcca53612d57a. 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/NLQ270900076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c60fcf92716db2cb5d6f848dd59b319b588b766a1981ea2b374b8ada8533c38. 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/NLQ270900077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50e2606e12e38fe5629be11c723c20e8e5f3737e63dec29915cbaca0b60b0d8b. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/NLQ270800071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec452ea3cf128bbe8d9c47bf7a703d55773162785f6c5c4f169fc8d808eb48b. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NLQ271300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d52a6ad624b0a6ab5dbb5f1d8226bbd0828b3665d2019d7f3fa2d92228d2a86. 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/NLQ271300018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b923d2c5c98dc2bb3410adf19a330a334f4fc7b41e280eb3ad2efb67eed9488. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/NLQ271500024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17142014ab841fbfb50a1597b8c169d36c91db7118635a7ea2dca41a5651abea. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLQ271400330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b923d2c5c98dc2bb3410adf19a330a334f4fc7b41e280eb3ad2efb67eed9488. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/NLQ271500024.
Wie Denk Jij Wel Wie Ik Ben (Orkestband)
Geboren Om Van Jou Te Houden (Orkestband)
Leef Jij Je Eigen Leven Maar (orkestband)
Ik Heb De Hele Nacht Gedroomd (Orkestband)
Ik Wil De Hele Avond Dansen (Orkestband)
Wat Ben Jij Toch Een Lekker wijffie (orkestband)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf741da07e6fac14b7b6d1eb8e1e3190635dec26e1d5a8e8d1823e7668d606876. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/NLQ272000027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x104c7f1c34a850be8f2979165dffd173817e31535d015ddb509a4c999adabdd5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/NLQ272300106.