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 0xb348057d2cfe63f828632fbeebc4889086539764f707e039781ea282c141041b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/da4fc61d-dd0d-4f48-8cb8-bc64ab0cc139.json and https://artists.proofprofile.net/proofs/artist/da4fc61d-dd0d-4f48-8cb8-bc64ab0cc139.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 0x61a2164c83745b00f8fbe9309375a5f3776adacf503348d04990db214e8302ce. 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/GBCAD0302016.
Mass in B minor, BWV 232 - Arr. Dominic Miller, Nick Patrick, Nick Ingman: Qui Tollis
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac3310059920ab6df9bd100323908d21beabbf947b735bab5cc44f45616768. 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/GBCAD0302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a2164c83745b00f8fbe9309375a5f3776adacf503348d04990db214e8302ce. 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/GBCAD0302016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0faa962cbb26c84d5efbdf04b47a9294f271d62afd2ceb00374b7e788fa31ae5. 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/GBCAD0302013.
Suite No. 3 in D, BWV 1068 - Arranged Dominic Miller, Nick Patrick, Nick Ingman: Air on the G String
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6bcc20e4baff42dc885546c45aabe3e8fdd3ad22cda18261412b3a41fca4457. 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/GBCAD0302015.
Partita for Violin Solo No. 1 in G minor, BWV 1001 - Arranged Dominic Miller, Nick Patrick, Nick Ingman: Presto
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09d70e0047ab2b662648174735df44bc33b6ca86269277210ef134562afbcf3. 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/GBCAD0302019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x474e5a653d76cd49898b101300dfdd87919c69d6225c963f881f24d4e7d5ea74. 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/GBCAD0302246.
9th Variation from "Enigma Variations": Nimrod
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x763d0ca09ba9c93e94637f2ef63ed12b815b24885963a08090d6b6b3b8f736e6. 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/GBCAD0302012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5abdaa31469f31957ada66666ddd884f8efa2e503bc9b83f96f1e707166286a2. 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/GBCAD0302018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa8b23f5bc1194c15e691a3d54cf6822c97dac37e43a6499cea4c2ac6bf29935. 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/GBCAD0302021.
Morricone : Cinema Paradiso : "Se tu fossi nei..."
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd05c9f663938ceb6cd20f6046deefc89241259953a14d9860b1e0077f185b2f7. 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/GBELP0400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bb39c8c3ef771ea0cfa9ccca87998c867920b8f1734e1701bf7085e284cdc0a. 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/SE6CZ2201102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b44615664c134db9b8465cf56ab9ce358c2dd73f4a923175c05671cdc2c6fb1. 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/SE6CZ2201117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18dc9286a601d063df8ff292748c49f041dcf76f5ba4818bfbab18498a4c382f. 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/SE6CZ2201118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x520b65bf13c5c609b6bfb5b30513c390bcc3f27ca8bc8095743e474a4d7e846a. 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/SE6CZ2201119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579914c350772c550f8f59f2803ea43ee4b3588357cae458193de6b18a943510. 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/SE6CZ2201120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61a2164c83745b00f8fbe9309375a5f3776adacf503348d04990db214e8302ce. 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/GBCAD0302016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fac3310059920ab6df9bd100323908d21beabbf947b735bab5cc44f45616768. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/GBCAD0302010.
Blake / Arr Firman : The Snowman : Walking in the Air
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa045fcb6f71d409c5391b24232339ae5b40a748065b183cfdeb7203b20cff378. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GBELP0400280.
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