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 0x08fc0be625016472515b00927abf5d0980136a8e088a0625bbf98f990bbc2c9c. 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/71d5dca9-d9f3-430c-bc2a-b14274a9d195.json and https://artists.proofprofile.net/proofs/artist/71d5dca9-d9f3-430c-bc2a-b14274a9d195.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 0x2a202331e832160a283938b47f084f58dbd3d4c05207e3d990d210b227c0cf61. 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/GBLLH2236404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3d124cb74e3a3a8b0bf417fdf253d1c15d08d07cc66912892cdc990583db41. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/GBLLH2236405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b4a5989cda2bf446510c3d2405d211dca82e3e5dfced94743a9f2a894a0be31. 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/GBLLH2236403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeae560c4b163114c616d018420a9b523ebbb655d9fe9e4bb2a91302a0e1771f6. 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/GBLLH2236410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0754912a61e0ac703650cef23c158c6e9bf5fcc923e67b3d427fd3a463dd69d. 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/GBLLH2236411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec72db08cded70454262f6cef8a473767685d96378c3c47bc0103ab9e848dcb. 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/GBLLH2236414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02cf6d9179392ddb7ec01d44f8861a722e70b073932f335ac3fade066405ab6f. Chain 2 (Bitcoin): anchored in block 960362 (2026-07-31T06:58:00Z), 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/GBLLH2236401.
The Renaissance Suite: II. PAVANE in Burnt Orange
Julie Cooper: The Renaissance Suite: II. PAVANE in Burnt Orange
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b86d1c272b4daaea5627721020c020f7080437802e1a93fb6845733226ce58. 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/GBLLH2384704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x848fabafe8f5d13ec6cc44dec43d43e282ad8fc5abb65ea6bca3a6b602c59557. 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/GBLLH2284705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa515e460cf15b59d92e6414c8d96cea1ae53abb30d7291d7a060a276a46a5bff. 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/GBLLH2284701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9a9386f9030111c3245d57bc1c3e2c9f74d30bc4b4ab91e7b5e50ffdf731ad8. 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/GBLLH2284706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x012739a341793f27502d12b26c273e11d29ae12ebcce27f7fd1e482a3f862e46. 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/GBLLH2284708.
The Renaissance Suite: I. GALLIARD in Sky Blue
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0515080d23b602da806f0bd3c04f089c9447b934c116d5b52b3197f3218b3366. 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/GBLLH2284709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42b86d1c272b4daaea5627721020c020f7080437802e1a93fb6845733226ce58. 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/GBLLH2384704.
The Renaissance Suite: III. BARRIERA in Gossamer Yellow
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd929bba24977d6ce2b791967b6fb6f02417d3052b80b5a3ae33568a32d3833a0. 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/GBLLH2284710.
The Renaissance Suite: IV. PASSACAGLIA in Klimt Gold
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c428aa2d653c9e21a18cfaf2b45e451e1bc89a2b194f02ff74557c43d84f72c. 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/GBLLH2284711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacde6c651f62aa57f017952f833e3a23adb972678b0a79305e571773b713400b. 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/GBLLH2284702.