Art of Time Ensemble is a Toronto-based musical collective of leading Canadian musicians from the worlds of jazz and classical music. Composed of classical, jazz and pop musicians, Art of Time Ensemb
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 0x7297e1e19c6105b3e09187ba8c1fb33fc6df449160b69ddec37eca066030b662. Chain 2 (Bitcoin): anchored in block 954631 (2026-06-21T02:46:24Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ce0d1d63-ddfa-4517-a72b-66ae4df9d007.json and https://artists.proofprofile.net/proofs/artist/ce0d1d63-ddfa-4517-a72b-66ae4df9d007.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 0xe86e4744751d5a112ecdfc7ca2701a7e749bee714414340eb1437112489d0ecb. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CAAD70800006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae82ae0fcc95cef8aecc1dd9bae9de17f4921f5a58a2fd355b06660c05948dbe. 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/CAR0R2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b27ac05c94badd647883ec8d534973d18b26f310c36c04a3f7f0e0410fbc5d1. 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/CAR0R2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf31956663c27a76ac95b6d51f891022a6029fde82d8ed4058f63f68eec470a7a. 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/CAR0R2000008.
There Are Much Worse Things To Believe In (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a5b44ef9cf38fe36b3036efc4e9d56f7a0533742c1415f9f3d6c1876640d2e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/CAR0R2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c339aee70889fc34640c6de3ff7841e240631524861bfcf5c75ca3afc4fd686. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/CAR0R2200027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3a5b44ef9cf38fe36b3036efc4e9d56f7a0533742c1415f9f3d6c1876640d2e. 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/CAR0R2200031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9362cc3ef050f081e1b0af1d0199d999cffce196c9c6b2576388bea0612e86c. 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/CAR0R2200036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406f89a5277c83f646ffac01ac061b0e7437b2c1fd33fddaaa05b45d29ee27b7. 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/CAR0R2200038.
If You Go Away (Ne Me Quitte Pas) [Live]