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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e96430a17cf8b2d754aa705090ead7719024b7e4663621e80a82b5be3ed994. Chain 2 (Bitcoin): anchored in block 953714 (2026-06-15T00:43:59Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7fe1a4b1-4c7b-429b-a3ad-f4e57ccc76c4.json and https://artists.proofprofile.net/proofs/artist/7fe1a4b1-4c7b-429b-a3ad-f4e57ccc76c4.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb34c9ee518d29f3d7f2ce428967e4253049ebaca60656bc1a7bf296bd9058b3. 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/GBBBA1800246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e29da5a98c0e68b4021370d676bcd3f68675123b02003e9ac4e4e8733cbb7fb. 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/GBBBA1800567.
Futuros Genios: Música Clásica Para Niños
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21ffcf245847e2cc6a37313e458bd9e712be896074907d22cd9e29001f97ec77. 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/DEN120206446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9899174fe813f2e11afc37bf1d067f79fbea6541fbcf6f53c8dc9d1fcff81cf. 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/GBF071800160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecce69a432857a1da022f560c72d510318a8a6459e4b5a37246f984e1797f1f0. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBF071800060.
Oboe Concerto in D Minor S.Z799: 2. Adagio (Arr. Harle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1390bca11e435ebe06e2330c83087fbb508cf118b9e8265c9e8027824e2a0bfc. 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/GBF071800050.
Scaramouche Suite, Op. 165c: 3. Brazileira
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4188f60ec7483ab1d1d72a20dc6a2d55f447152a8ae55afc44de06727e4cd20. 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/GBF071800170.
Escapades – 1. Closing in - From "Catch me if you can"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee27b51aefd5f271e005a34f98115393bb8704cbbe2ccac22e6363321f76da26. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/GBF071800020.
The Diary of Anne Frank: If (Arr. Harle)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0036f3356f09e3f86033a60821e8d38528289d699eb0fe31535b0063e3a667c0. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF071800150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3bc7a535db08c9d4f932750ecaac1bbe49b8380700bb6ca635443bd2a5da0b7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF071800070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13bfeb5b4bc886d3155c989d4f75c7bbffa91c121f336890b896fc4cb4728a5. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBF071800090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f6d8da16ef78c0af8b8ababcde2905e364d2e73500f0c361790794b7a751b8f. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/GBF071800030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6b820497c67ff8712ea63fed07f4c349a42ed0f87a185fd7a072eead0399b57. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GBF071800110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ddff0fc466987790ca0ee0b705b56d8872b8394e56e39e1e30511fbc31de171. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/GBF071800080.
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