Cambridge ( ) is a city and non-metropolitan district in the county of Cambridgeshire, England. It is the county town of Cambridgeshire and is located on the River Cam, north of London. As of the 202
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 0xe764597a50a466a97f82eda784b1ea0d5f1976243cc7857fc52dc3941907df97. Chain 2 (Bitcoin): anchored in block 953660 (2026-06-14T17:20:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/548dc061-56c0-47a3-b5f9-a6c436cc70d9.json and https://artists.proofprofile.net/proofs/artist/548dc061-56c0-47a3-b5f9-a6c436cc70d9.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 0xfd99c85913d305ea036acda7c5ba0daedc7f4121b3af4351108605e1c2d857f5. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/US94G0710057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15a6f51d28aadb68b7424d0a6638a8fb25366d0ea9d6838fe97b6847d02bd600. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/US94G0710052.
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 0xf48d7ef68b26d421e08b9fef119f2c623b4b56ee0e5bc5ba465e47770e9c13c5. 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/FR0O70713200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a49b718be9c42f0d158806e0aacb849b5d0420aec419568e24cfd0eeb71549c. 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/FR0O70713270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc73e68ff6435a66c6752101c71d8ed0e03d7a3fb242c2a66c884773347a5c2. 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/FR0O70713340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65dddd28d1e1c20429d8ad00ce26775dd0ab5c7b63640c572a6996660949ab9f. Chain 2 (Bitcoin): anchored in block 960181 (2026-07-30T00:53:20Z), 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/FR0O70713000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb3e3ec4168038d47827181403c6b7e8714a129548ffa058d082af4c20ddac37. 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/FR0O70713040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5043e5fe8b357e8e93a75752dd55a0f777e5e0d5118a4d14dae465861c7c9b6e. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/FR0O70713310.
Social Security Presents The Social Classics Remix - Genesis (Audio Habitats DNA Remix 2016)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab52245451c9066bfbdadfff3e75c54c3a952c868a50ebb0ff88b9afa5125698. 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/US94G0710088.
The United Colours of Benefit - Vol.3 - 2013
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c3ddad142a3861a152158baa3539e9e839ff3c44de916b8126aa4083e9108. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GBAYD8700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f1c3ddad142a3861a152158baa3539e9e839ff3c44de916b8126aa4083e9108. 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/GBAYD8700061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x519ab28ce797c194247787bb229751843b9c1f262777c1166fb2d9911ffab15e. 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/GBLWD0701609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa22c8e7ead5e7c2629ad21b41759a15def4d764473cfb61149958f311c2bec08. 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/GBLWD0701610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27136326ddf3ef2fb82cdecc570577f2a1a371699e540a82712cf780008a47c2. Chain 2 (Bitcoin): anchored in block 957067 (2026-07-07T16:54:37Z), 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/GBLWD0701612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20b52d6daf2670203ce169edee12af9d160cfb28b2891428e7e0fdb66799b95e. 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/GBLWD0701615.
Vesperae solennes de confessore K339: Laudate Dominum
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28376c01b529e7759d18483d34d4006879c53c5c7e235d838d1687c09da00fe2. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/GBAYC9800305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607ce505be0c0f55bb2f16b916ed8e7a91c7339a1e3df4b79cceb77d662ef46. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/GBLWD0701608.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bd03903d82d6f9b9b00e1778fcad2baee2b3a913cd7e49a8dd42490f1bd50e0. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBLWD0701613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e89a60c9967ed1028dd143cfe25f7c455053cdb64d3bee649c215d711f7f55. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/GBLWD0701614.