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 0x9bfe189e6129744c03315750f642f34534b7f55403ecb30ef450e568ebd40499. 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/e9294d61-76fd-46f0-b094-f3a7fb11298c.json and https://artists.proofprofile.net/proofs/artist/e9294d61-76fd-46f0-b094-f3a7fb11298c.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 0x552386354c1377f1375ab46dc0d9170ce3ff42eb9392da7dad2018a78d634337. 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/CH7812371032.
Icon 5 - Welcome to Malaga (8 Bars Challenge)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012c76a85eae8b4c109a24dfb3d865773fb75faf5e835f39ad42d710d6c85c52. 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/CH7812365441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0157f38a1d73d8ae9bdb249c06d40d97c136edeecccf4a742c487c591c514a8f. 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/CH7812351058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8708c3225fa66646200d84c26ae0ae31ebc47a30bfac487832cb19eae9f3bf7. 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/CH7812406086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7c9f8dbefc1c8198d55c345ea060fca03a78e332f4be704421089dddac2db. 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/CH7812365796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b54ecd0fd2b4049f34df5d8e45a9b02f6452b538fe5df1bdcb2c1b550a6e243. 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/CH7812406720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f6a8654bb0bbd11ce1c66bf4bb3c6e61c3e413983c670f2d35aa2b921a0660. 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/DEKF22401351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d281da6ea70f04247bdcf2b6f8f3272daea517c39d912e582070a61a127ba0d. 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/CH7812363152.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3357679b4d71525532cc6ed0c1ac6b6f258baa6539f8f8e8a471c4356645e477. 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/CH7812369057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f282d59c27937dd04107d274ec560d907af5df3616f6d9da7fce6f259ab03d. 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/CH7812368269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ee002198852a0f2b1a0f986cd295a3fb1135b7b8c20f25895d5ba7f91732975. 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/CH7812358979.
RLR2 - Runde 3 - Tag 5: Wenn Welten kollidieren
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce44c3c2819870c79c3cfe578dc1647a062b62c9c284c94341714cf2e791dd11. 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/DEKF22500057.
2G HASCH (feat. Rina, VS Mosquito, Infinit & Josethirty5)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0d6ccf23c6ad9c2b62d2739f9ebbe40ffc75b495cec1c7b1cc93badca8b4902. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEKF22401791.
Spotlight (feat. Der Yavuz, MEL, Infinit, Monny & 3imad)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x543e1bc28ad730f065de715429d67ba68b4caede8efe805324d3186fcc465ce0. 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/DEKF22401651.
Universum/Hawkings (feat. Olli Banjo, Boz, Cr7z, Daev Yung & Infinit)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400f81f6d4c0e978b239d3e8b2a459f6f24a3e103755c1b886f8a97b9a631d39. 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/DEBN21800005.
RLR2 - Runde 3 - Tag 7: Jenseits aller Grenzen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x124fdfea1e798e417fc505191f800502fd8451224f35c0315934d609aed71943. 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/DEKF22500195.
RLR2 - Runde 3 - Tag 6: Ein vertrautes Echo - PT. I
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c031000a156921c5fcdefb16b304cd2b09273870dc6a142cf3a62d966a0777. 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/DEKF22500069.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf879053183bc0f1cf372ee6705897c1b9f5ca52d3dabad560d24bdf6822b6489. 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/CH7812367619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x322ff39a0bd6fdb18c3860f32d7a5ad24fbb08284b852806a59a71ae2e64d638. 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/CH7812357993.