Tegan and Sara () are a Canadian indie pop duo formed in 1998 in Calgary, Alberta. The band is led by identical twin sisters, Tegan Rain Quin and Sara Keirsten Quin (born September 19, 1980). Both mus
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 0x1d79362c6a03a690aea0211d81b0005e594eaa09ae674b723f31fd609cd51fd4. 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/96f2535d-3df2-480a-aa62-006ed2d908fd.json and https://artists.proofprofile.net/proofs/artist/96f2535d-3df2-480a-aa62-006ed2d908fd.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 0xd1a5b970336b3b5053b4ff019cbd69567a209a54b1108f580b3e717ddfdb0d94. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAIK2403104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0923c6e24816fcf1e859dd4e215e773c95df7618e224dacf95b7ef7512c82d8. 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/USWB11203028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ff59564f8e0a434d6fe673da676b3e87b44fdc9c8828968f4320a198f404b2. 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/USQE92100366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6466fa5b37c71be789bcc73e7857c91e1b4830ba8b4c3fad854852ec6c9c5156. 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/USWB11901665.
Every Chance We Get We Run (feat. Tegan & Sara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328caaf31553d5f5cfca855bac749319e44df41f1b554dea14e859a57ca3688. 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/GB28K1200053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8328caaf31553d5f5cfca855bac749319e44df41f1b554dea14e859a57ca3688. 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/GB28K1200053.
Feel It in My Bones (feat. Tegan & Sara) - First State Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fc6abe7cc13d9bebde6f91901c0cf49eca5f7467f092366fcdf61022b7ffbb. 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/US7FE1000011.
Feel It In My Bones (feat. Tegan & Sara)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44e0ff50e5442927b6ce13b8f312ba6c43d85d69498513e65e804321699f0ee. 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/BEP010900175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26696292e0096b0ffdc7a4f9077203c7760e27bed3e5200d526eb830390a0b6f. 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/USQE92100068.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbae90a9b2d4a797a05e18e738e0a8be30b4636744af61b9b3bb438465933add0. 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/USUM71401744.
Tegan and Sara Present the Con X: Covers
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d1105ab3aff7657f49697479f6535221356b200218c2608babc730a1315666. 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/USWB11701725.