Siena ( , ; traditionally spelled Sienna in English; ) is a city in Tuscany, in Central Italy, and the capital of the province of Siena. With a population of 52,991, it is the 12th-largest city in the
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 0xa6abc215fb7a1240a81f2e29107300b7f1a9337b8a15d533be7cec4a6d9968ef. Chain 2 (Bitcoin): anchored in block 953724 (2026-06-15T01:43:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8d7bf71e-1556-4ce3-9167-930be5bf8762.json and https://artists.proofprofile.net/proofs/artist/8d7bf71e-1556-4ce3-9167-930be5bf8762.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 0x7b3a0930ef8d6865558be692c7a1b937580a60951cfe101ca509febb3b05d64b. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/HKJ962215450.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc404590351e2478865f40194881561db9c09bbf624d52e6653109045fdc0f570. 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/HKJ962215447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfedadba8fde0807e0fbe31ee1963433f77c5a1863ceadb083e784f37eaa60132. 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/HKJ962215451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x887542004dddeb9e398abd3c1f5f92bf81b4d65e35db74dc8497ba30e44243af. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAE32302991.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dce0ccc60ef2d08907b40e2887581c2a01c05ca8ada4c47861d852e5400d47. 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/TWAE32302992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28ab114a49472ed44891d74eb5c21394e371b6af36b535d1152d2403cda11720. 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/TWAE32302993.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e3fb42684401e0b5efd0ab56f102c056b013e19cc73506033c06c917dbedfc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TWAE32302748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f1b723c2ddeee93ab70f9a93dc48bfcdec33866c7d8fb59c0d3bfc801c117c. 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/TWAE32302995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc402dc5f248bc9e2a1b9890166d6b207869ac5dcf302cf6a2a454ab81a81b43c. Chain 2 (Bitcoin): anchored in block 957025 (2026-07-07T10:59:31Z), 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/TWAE32302997.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42eadbb38171d21e149e5873651bf32f4817341d41d0029149a7ce8a2933542b. 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/TWAE32302999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfce9e950f7e57229e1cb2cc63d20a358b20097095033c945d2ae9b8dae0602e3. 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/TWAE32303001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdfe0eb4e7ae263f4df4b70211e7bd2ed65aa42c124b313a1c17b489d130b354f. 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/TWAE32302201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84767c08c46fc7627ab3310f35505a250a73ee74710061ef74639240b2b795d7. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/TWAE32303003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5901b87e7a49dcffca26b436d9c938423ceee1ff37e3fd7931c5978053b88c2. 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/HKJ962215425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdaceb9eada75d9d2b8496a2a3735d616dd6ca1edfb64e9823412aee68125667. 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/HKG732243334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5af42e44a5c8f9feaedb933a9212130f88ba1cbf605ef85098d950c2d3aaa41b. 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/HKG732243335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ff841991134958a3e49fdc715a3b10a16bb4e855c4b2a12fd1b8eba57380e. 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/HKJ962215457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d860442250f757519cf049f501f4faeeaf81d11cd514cc1a757d0b7f048fde. 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/DGA062257270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1cddcc9e44b921efa1c68dbcbba6044ee8a869a0770bd1d6b7571a8424ba7c8. 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/FRX282291978.
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 0xc2941d543d0f1df5dcbe44da0f98245dc38135d3141a28425c6467412109acca. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/DGA062257269.
搖滾藏獒：乘風破浪 電影同名音樂專輯