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 0x05675b8c4ef27fe3052a29199ce529de73c17f29d4ed996f2cd71b2cde80e7df. 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/6db13bdd-68b3-4cfe-9bda-a4db7a68e424.json and https://artists.proofprofile.net/proofs/artist/6db13bdd-68b3-4cfe-9bda-a4db7a68e424.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 0xc95c9e80609e82fd7c33f3f449df027a927518e6bee404d5515a8f394227a80c. 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/GBBBC2000206.
Saint-Saëns: Carnival of the Animals: Aquarium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. 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/GBBBC2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacef2da9ca8c159d4900d3dd40f90240b56015cba18f71615ea3ece000ee0ced. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBBBC2000187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc95c9e80609e82fd7c33f3f449df027a927518e6bee404d5515a8f394227a80c. 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/GBBBC2000206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b33be1daa57b6b5b6d488d8d0cf880a7b49d5213c8cca70522c0970821ccca0. 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/GBBBC2000207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c838c530fa1bf215ca5866e9c893550221bb7b39d666c03ba70cdef9a2afc2. Chain 2 (Bitcoin): anchored in block 957046 (2026-07-07T14:04:01Z), 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/GBBBC2000208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f796561cb175ff19fa6fac298c7a84c3d03b955c9925ed5bf29a5731a7f167f. 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/GBBBC2000212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70ce454cce6ca69b2298544d1db865bc31b4708aacacdb1cdd231ddd785a1e5. 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/GBBBC2000215.
The Nutcracker (Suite), Op. 71a: Dance of the Sugar Plum Fairy (Arr. Langer)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b991400bec01292f34ec47dea7765a37ff82164d88d5fbfe90a00eb261a4bbd. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/GBBBC2000216.
Lyric Pieces, Op. 43: No. 4, Little Bird
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x398fe2da5c948be2938d1899ab5857eae9185ce1864c26da3871b05c669cbe01. 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/GBBBC2000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c6852ef15a18729d8e5821b656ea526a8223f020736e6e56af2cd3537223e64. 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/GBBBC2000229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9835435a3fa8951044c93aa94fbcb3c4e3e59ec11996c113f8f14a863dd5c433. 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/GBBBC2000230.