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 0xc9c8beb79b9410914107810f224d37da4d50a4fedacd81862fe5e69c71df3b55. 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/a3d02ce5-b3c5-45a7-b8a2-b20ddd57b611.json and https://artists.proofprofile.net/proofs/artist/a3d02ce5-b3c5-45a7-b8a2-b20ddd57b611.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 0x859624a28f863eb5fbfbb8fb39ff6215871eb72c7a5f20e6d2dfc7f9dc514fbb. 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/QZHZ52226141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16f87c3c2a9231a3a253a258b4e4a31be903d8193eda16522e766a778de0240e. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/QZFYX2389359.
Minnie & Mickey / Tu Ganster (OG Season, Vol. 2)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804ee76d0696508f456f185a05b36b8edebd71eea1554ea204e424a11a3c4eb5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GBRKQ2352848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfad06f784558bcfe023e95428efc588d1ab4493368a69e62fd4bf7a9d4cfe164. 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/QZK6P2307461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2622bc26a547b1ac3b068aad2856c880a63b3b9f237a72285e3357ff98d76536. 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/QZKDT2300465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3432f514c9bc300963beeb07b0fbc6268b21848ab346f8f104e2cf0079f342. 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/QZWV32320590.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba7f6edfaab6a3e49d8d447eb9a2b0b8024b26aae82917f982b57fb642c72b3b. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/QZWV32373948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23a67e475225793eaee7810ccfe66c4afe513ffd460376ead6ec361e4cf4b8cc. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZZ8B2389293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f41b37e7fc02a02481a40dba72e14ed957dffd5c13a11b0900738313068dec. 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/QZNW72410706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77867f538e346a9fbf07895382e01f47b731028993b488d48f8097789fd41ac6. 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/CH7819577295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x721ad025e7d5b191765ffd3844753322b3b4b6349f8ed63b687c4e80d3ae18dc. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZTV32317724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3b85a3d8705b01b5df310b30d7801699ccef65938d10da9a97c58f5fe23597. 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/USLZJ2350143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc245042ca643c9a01cd1e7925655e9e227cd1dbf49f0b8dcbb2fd1ce9b71a4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZNWT2243424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92acbbd5096a9acd9ffc0da667bcb13552ba2ce75f1ec30840d64f86dcc8d20a. 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/QZ5FN2390260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24027ef4c66f43b61c929096ba1725f03e2b0eaf9895a665ba8742f8d76e7121. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/QZWDE2398741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9eb83520dcafd6abeb6a00412a5ffa343d2bec9c927500c6598dd8497031eee. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/QZTV32315543.