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 0xa3a720d4da7c555215863df6e16d494729bd5d8511c7c2d6dd5c55cab98aaca6. Chain 2 (Bitcoin): anchored in block 953704 (2026-06-14T22:58:38Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/797b00bb-7872-4dd5-9f0e-0b8fdb3b4719.json and https://artists.proofprofile.net/proofs/artist/797b00bb-7872-4dd5-9f0e-0b8fdb3b4719.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 0xddf0ef234d50f6fde40901fd3ed5cd434dc3065a6f71360590139548ff9868d5. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QMQME2300120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9448f2fff0dabd9be3fafec4864446612c7eece61ffefa8a4f24152ba8039cfd. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QMQME2500025.
Once Upon A Dream: Instrumental Renditions Of Disney Favorites Featuring Piano
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22492a5f7b9547e6fcf0b4fff6d5063c98a7e702ec5bf7ac9f9cd403de608729. 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/US86A2000235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0362ea56b4687ae8140c41c759390903183ae6488ef46ea2ed05b2ebb872acd5. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/US86A2000244.
Part Of Your World - From "The Little Mermaid"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c852692d1c92a0ef66dae23c884487b7f62fa8f076e7bc09eac58bd916e5f. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/US86A2000236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3b7eee74980bf75c0c442c96f1182ad56ed605ca4ba72a86940a8cbb864fdf4. 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/US86A2000238.
All I Want - From "High School Musical: The Musical: The Series"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb52e344761016b0e1dcc92989e45a4265794bcb1474cd68add27603fd0318f73. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/US86A2000241.
Someday My Prince Will Come - From "Snow White And The Seven Dwarves"
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b28e653e7fedb87ed483e22e305dbda7d4077e0147505c1481f378496cb588d. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/US86A2000242.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794c852692d1c92a0ef66dae23c884487b7f62fa8f076e7bc09eac58bd916e5f. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/US86A2000236.