Kate McGarrigle (February 6, 1946 – January 18, 2010) and Anna McGarrigle (born December 4, 1944) were a duo of folk rock and country folk Canadian singer-songwriters (and sisters) from Quebec, who pe
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 0x96dec160710bf14a8fcb4af1d62fad187f3a25e192ef6ae45bb4d62a097d5d5c. 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/0d2d8917-fb0e-4994-8155-4571ba31baf6.json and https://artists.proofprofile.net/proofs/artist/0d2d8917-fb0e-4994-8155-4571ba31baf6.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 0xadc3c4c20c91df8e2497a7f01c98471d098b9b19903dfd41754ea4ac3d5e4520. Chain 2 (Bitcoin): anchored in block 957801 (2026-07-13T04:17:08Z), 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/USWB10403428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd94cb1ef438e180c3c8faa11864de03423150b55f315b1791395877106699a00. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/USWB10403430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75ef56d37b979c21ccb99969decfc35bcfdb550abe26d8b94e2d481d0c268428. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USWB10403432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee60becfb3521c0e454c35787e23951059fa815dd03a208c05e5a70f79cc0448. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USWB10403434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6aed1250873cb25e54402e0555f883df022b1770d2dffb7d3e25333416af0831. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USWB10403436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec2cc821ed6de8528f01e17ff12c787aa7ccf3188b968eb5d1c3dfd251ade6ef. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T11:30:47Z), 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/USRH11604540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3e200eaff0da264358cbbc26b45fe1390e533108d359eb5b8cd7cc7fd27312. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/USRH11604542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c400c0c5d2883767563d68d49a8179f0b20f24325eb39611a4b20621be58958. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USRH11604547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5791270e5913cff849ba029a52dd5c60b1ca151cff863040cd9d773aef0f3b72. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/USRH11604550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff502048623ac666a0e35ccb0bfac9e3c8c3f6cbb49566b5c87d37fa3122db41. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T04:25:47Z), 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/CAL540303901.
French Record (Entre Lajeunesse et la sagesse)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x871d4a5ae79415edac1c3ef1dd3a5c09ac454347d8994da452f2c60ec1378128. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUM70501499.
Complainte pour Ste-Catherine - Remastered
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84690721d255c2d407b3cd8ca4f509f2b18cc79eab65e3df0ec54206d32fd7e7. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-20T00:27:23Z), 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/USNO11100098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9474f7e90924c2d4c46e4c9f22ff248e4d7c783defce184257afc35d2f5fe435. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/USNO11100111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9719545f7e29e0518dea99215afcebe9e4e610e46a2519a37a1b58607403c91. Chain 2 (Bitcoin): anchored in block 958706 (2026-07-19T08:50:34Z), 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/TCAFP2180492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7e06ffcd41115571577c6016487b13d4b3b7185a8e3dc9086bf7e12704c7c0b. 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/TCAFP2180496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d97110b5ed40197b3652d1241733fe6cb36e26a7daebda8eba5d077ac48e0e. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCABK1249617.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a7123868ef904dcff3c83205958cdd892e564f73db4e4a16c0fe58ac00b26c2. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/TCAFO2191255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1c088a58007c039d43604ddcec5abb87849879b37673e00929e0a148fe6102. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCABK1249641.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d3acee7213f519324f09bf9bf6aa6074f58b4bbf81588a7e5e15882b23cf872. 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/TCABK1249646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64f7fa20c95a60b6a846a0bacf1a7aad77851819cc1ca77a3f31867706c410a9. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/USTCE1028479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06236a2b6034e330337d3a5ff1e1933c070bab4c1d4763d93fd80e41b0b4cf99. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USTCE1034636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c0d3edb2dba529a8eff10f36b86f4dc437138c117941aa8675126a2ade0245f. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/USTCE1034702.
Tant Le Monde (Live in Bremen Germany 2005)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4069c317883f1e38d4c64cc924ecb299b2ab78bddc3e51373abde5f6eabf504e. 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/USSM19100745.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81ef262450bd316a37015cb85ddd63b89c2f549bd93e3974dc7ef43e9771fd2f. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USWB10302764.
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
Better Times Are Coming (with Rufus Wainwright)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93538e859e0d6615aeabcc717413510200c8c148eb683c7d3373ca6b293f608c. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/USSM19100730.