SMart is a British CBBC television programme based on art, which began in 1994 and ended in 2009. The programme was recorded at BBC Television Centre in London. Previously it had been recorded in Stud
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 0x60aa424af4b9dfde92e149a455dada9b0d46d96ee26da5c56bdd8f3f713ab013. 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/675eb0a0-bd1f-4588-a60c-e7ea900bb6c4.json and https://artists.proofprofile.net/proofs/artist/675eb0a0-bd1f-4588-a60c-e7ea900bb6c4.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 0x23e277c902bedc3f4b07d88d9944d74f0f74e09e934caa81e4a8acae7f27f8b5. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/SKP592500082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb65dbb1673fd59d8da029002bd0396ca1263ab20f4d62b2db48d0e51b1429b47. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZN882135581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc13c3a028699843b8580f6be26b8402e523cbf65bdc18bbd8a5d47518abe1089. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/SKAR92380004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d8795b172e25a5c6b7b82fd7b913aa6a6c8688b837e0b80dce2d31c20253e6. Chain 2 (Bitcoin): anchored in block 958793 (2026-07-20T01:38:59Z), 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/SKAR92380001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73f852ad70a74741580afdaeaa21b4b337e75b0e95257e77ddd4af499f5a658. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/SKAR92380002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fd4987cc1cf59fe4098f0db08fa6f4eecad287ea02949c177341bdb154704b. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/SKAR92380010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74df2776f4a73b614aede442084d848455098ce94a0b842dde8728dc63d8baa1. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/SKAR92380012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c207992078d530fb23f949d04fd04513830ff1dc3be2a854aceec372207f94c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/TCJPE2562663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4610be73c8a090afa2e1bba31bc5c9744fda7acbbbe6b608c6feea52be4f98c. 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/QZYFZ2369530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x214fb0a253b15318bc2f79d3c761ea6101695863f8862063761521475748f963. 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/QZYFZ2369539.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e4bb87be5db31149b08e504838f9c2e3c6178d7ce69b44b1f0568ab3bd7cb55. 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/QZYFZ2369540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab2dd238729451e79ffb82a8d874e87335f7656381be380ff5063628ab691fa6. 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/QZYFZ2369543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x915c69dc6a2ece993cccecd1630c41e9b94892a3cbc3d765dbc690f5ea9f9f9c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZYFZ2369549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9d1f6ba4a663757e5abd3aa3f1bdd0b520942fe6de9d796682abbe0371a80db. 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/QZYFZ2369550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71113c68fd9495ed96acc98863dc5978ab47e3aa750e91c90192a875b0bb74f. 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/QZWDW2411032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83a9f1b974f7ca217db537e57fbb709b0eed044d5449bc45658af92f5a25aa1d. 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/QZWDW2391331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1e22be0850dfd8ca16df4aeb8d05cda49175a31f1f96cb969b4c4c801ecc413. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QZN882355081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x767b73dc44ba5869c207d8f57281388e0f065761bdaa4a7c2e873b7eb420b4ad. 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/QZN882355091.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69d7bd60a68da96408af019816c91982c2b89fb689544c34e1f2f92e702188b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QZYFZ2369547.
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 0x6d7ed4f7d412680b9cb08b76e6b63aef7d1801ebae66448b7d0afbc780802636. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/QZYFZ2369554.