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 0x02515a5de479ab1a4938e9a96371d17135eb823a01463f83b1c8012c66f1e1c8. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6fd3a470-ac99-4a01-bb41-c262a3068c63.json and https://artists.proofprofile.net/proofs/artist/6fd3a470-ac99-4a01-bb41-c262a3068c63.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
12 Sonate da camera, No. 12 in G Major: II. Allegro nobile
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 0xbf3cb3fe7158ef12227b7914756e447c4bcaf27f5ee43f766bebe9e27cfde633. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE472000290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c2abd2307e0ab454d20dd30a4ad6d004bf123e8f38419ac062ea47815ab9ea8. 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/DEE472000294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fbcb67f0559e8825f672b7f2f66d400eb2a85e74c647bd6ef9cb4d7faa71a74. 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/DEE472000297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cbbd9d8df4ef791b282a1de31e77a2290cc18de40f7971797e05e1d92eee252. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE472000300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51e9a079b5c4c2a5f47811fa16e69b2db200e896adf2599198f2c7d07d1e4935. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DEE472000301.
12 Sonate da camera, No. 8 in E Minor: II. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44004870c0f4a3c6959115aa2b96d9bafceaf3873ac0c3a4003f2b67205caebe. 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/DEE472000305.
12 Sonate da camera, No. 12 in G Major: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbdf5cc6c6f969a55fe734470ec9b6a7f72f0ad170c369c834a978918939e3d6. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/DEE472000289.
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
12 Sonate da camera, No. 12 in G Major: III. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafc6f44e4b2c56d7e0982e720bc7af5b178a5591ba7b69a28e20c8f4b62c7c80. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/DEE472000291.
12 Sonate da camera, No. 12 in G Major: IV. Scherzo pastorale - Allegro moderato
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d0ba868d003759d305785bfe7c1c1bc67312e9647d48782d723e463ad01faf6. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/DEE472000292.
12 Sonate da camera, No. 8 in E Minor: I. Largo
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960616b6ac2814351683abe1b91b3f43991daf3ff6dfbf3513fc172f35a1a33d. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEE472000304.
12 Sonate da camera, No. 8 in E Minor: III. Affettuoso
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0bfffac273b8974ba3a7c29c4d68918cbeff978a09bf4d791bf936c9471cbea6. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/DEE472000306.
12 Sonate da camera, No. 8 in E Minor: IV. Allegro assai
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x822a5bab55f9349758106d3cf13e6653d49969799cee08a6a5fbb7b3ae6bb2ff. Chain 2 (Bitcoin): anchored in block 960422 (2026-07-31T15:27:29Z), 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/DEE472000307.
Sonate de camera No. 1 in D Major: II. Allegro
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b2dbfba941184c9fed9356bbd49eab126bcbae92616d9f1ea8bcc91d28111a. 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/DEB202203902.
Sonate de camera No. 1 in D Major: I. Preludio
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a6a99e8abbe9f273495cdc1165ff7d0974d042f6ac0213853ab381955c9c5fa. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DEB202203901.
Sonate de camera No. 2 in D Minor: III. Fuga
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b86070729302db6fadd7bcae1cb29af51003e259269a54f657ead5e5a5fc40. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/DEB202203905.