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 0x21a33116bea51f2407aac3696d966b7777a75df6df34b7330b04ad6dd32a9ebc. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0da918e4-aeb6-4209-a65f-a4328fdd8a61.json and https://artists.proofprofile.net/proofs/artist/0da918e4-aeb6-4209-a65f-a4328fdd8a61.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 0x351c61dc0dfbc7454f27940d27470860895ebc571937d4347be240e74a82d85a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/ITAD82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5d29d20c7052fe0f8b130e5936ffb2e023ff8031d4a290fc2a8c2ba42ee28. 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/ITAD81500213.
House Relax, Vol. 2 (Deep and Chill Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89570193f599f2d9a862421dd8c631fafc93a9b54b8f72404a832febbd2d44a2. 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/ITAD81700027.
Sunset Chic, Vol. 2 (Deep & Cool House Music Vibes)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89570193f599f2d9a862421dd8c631fafc93a9b54b8f72404a832febbd2d44a2. 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/ITAD81700027.
Be Happy, Vol. 2 (Deep & Tropical House Selection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89570193f599f2d9a862421dd8c631fafc93a9b54b8f72404a832febbd2d44a2. 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/ITAD81700027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b6568285638e49217574dbcec8e754bc3fb2cab75e41c4dadf687961fe35a75. 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/ITAD81700036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89570193f599f2d9a862421dd8c631fafc93a9b54b8f72404a832febbd2d44a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/ITAD81700027.
House Addicted (The Best of House and Nu Disco)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1daeb19b966e10bf09be6f82b12122d701c4465b14c7c5977be601aaf2fc635e. 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/ITAD81500286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1df28f57546c61021caa1f2853b2250c83ac2e936abd3162dd6c1dd294f2c9db. 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/ITAD81800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x033c2abda14e528ebac83655d31267bd6d0d022cded74f1976db0c04df488c43. 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/ITAD81800032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1d5d29d20c7052fe0f8b130e5936ffb2e023ff8031d4a290fc2a8c2ba42ee28. 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/ITAD81500213.
Sunny Sunday (Feeling Good Deep House Music Set)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89570193f599f2d9a862421dd8c631fafc93a9b54b8f72404a832febbd2d44a2. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/ITAD81700027.
House Relax, Vol. 8 (Deep and Chill Selection)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x351c61dc0dfbc7454f27940d27470860895ebc571937d4347be240e74a82d85a. 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/ITAD82100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69b0fbce4c59a26f008276249cf033efa87fed64bd171fd36020d84b60ddb486. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/ITAD81600039.
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