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 0x9727f43e24fb9fcca9d4915e60f25cb61edd0504d559b6c89bce550591f3ce18. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8a4df5d6-9a01-4fce-a705-0855e122ed5d.json and https://artists.proofprofile.net/proofs/artist/8a4df5d6-9a01-4fce-a705-0855e122ed5d.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 0x05e56b403c1e869414e4dae117e3b562cc6bceea7f0742b18c4bcd31140de17c. 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/PLA162268602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd04a19b775a9c5858555a671c824f1c6516de62529593b095f8934076a1efbe3. 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/PLA162268603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11771a4a39966dd7b7706aa9df6c235282cf2db7415baebf91f1b3224e0c118d. 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/PLA162268604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16876b813a7508e65ebae07b734b78e679e533c72d8d529c6b95d670b0ca5b18. 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/PLA162268605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e9d40c0bbf6bf545c063d3deba9b81ece4b2f511cba0dd993db049cf618865. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/PLA162268607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794462ea38f2b297d8a416e8e9df3813df331b28997315860abfca277da7ede6. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/PLA162268609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c33673c8ec8851f7104d9cd377ac34f8955968380cd166732d6819a74870f4a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/PLA162268610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32aece7a989e472b786bf2a04420d383566329509680a8e79a85c5258e245e3. 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/PLA162268612.
Neiges for 8 Cello: IV. Aiguilles de glace
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9137e12703ca9247659eca09f6956a978bfa86b8acd0478e09f48628ebbd4e6e. 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/PLA162268616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x895323d9cae0e813d8fef975ee5e2afd5d99f22fa47a9fb9c32d6086b4737417. 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/PLA162268617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19578399fe64587e9d313039101cd71c60eac1fd7ae8dd49522a9c694ce666ae. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:00:29Z), 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/PLA162268608.
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 0xeed3d399d255755beff6b8dee657c9512b6a7f059260f784681660562314907f. 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/PLA162268601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7aa90cc79c66bc9a1f12b48c5aafdb8ccfaf48e32fc6c99cc13d3a0cd610487. 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/PLA162268606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d2a532080a0eff801f1dde9b50f384f187d670fc8d6a35876b53d6180e1c5e1. 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/PLA162268611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4ca80bd5f25cdefdd22b510365c4bb35a1ddf57d9164171df2d3045264923ee. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/PLA162268613.
Neiges for 8 Cello: II. Etoile de neige No. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f91cfa79e7616a251314316e85dbb271f42c793fd21430bba2d66a4f26a3284. 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/PLA162268614.
Neiges for 8 Cello: III. Etoile de neige No. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09770dbe7cc66a7ea76370fb4135882c8571af90e3ead5fa34f0ebcf7c70fc8f. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/PLA162268615.