Le Vent du Nord (The North Wind) is a Canadian folk music group from Saint-Antoine-sur-Richelieu in Quebec. The band performs traditional Québécois music (which is heavily influenced by Celtic music f
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 0x0611285a96993dfea1c559c9f202aab55982175c82bfb8c53742cf3cadfb143b. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ff0b540-d014-4ada-a6cc-80dcc2d01435.json and https://artists.proofprofile.net/proofs/artist/5ff0b540-d014-4ada-a6cc-80dcc2d01435.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 0x9fd177af2d13e633d3db97b8669654f529e2d7462cb3f4e5284ca6993a68dbb8. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/CABD80801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fd177af2d13e633d3db97b8669654f529e2d7462cb3f4e5284ca6993a68dbb8. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/CABD80801320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f75412da48044dde2deb739bb499d15317150ec7cd04e6c3638b93540843108. 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/CABD81902111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a83d6060a3769b109abd943d2f473e2c375305c8941720c4b244a8d8c8b3c9a. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/CABD81902117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d6b8f14c09d4a91597a76265855555afe0330b2ae86efbb5cf5a0580921eb24. Chain 2 (Bitcoin): anchored in block 958918 (2026-07-20T20:20:37Z), 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/CABD81201515.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d4c3923b267995d67d36b8a1692a6574aeba8a32a08bdd15a3ed922051edb6. 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/CABD81501664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740a495fd32b466666c3abd743a11a26487cdde43a95b833a52a62e1508da8c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CABD81501668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7e18f47d34ada6b80359c60e7a77e3914b12dc661dd9bf5ea69bd0b207723. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/CABD81501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb740a495fd32b466666c3abd743a11a26487cdde43a95b833a52a62e1508da8c. 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/CABD81501668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8c7e18f47d34ada6b80359c60e7a77e3914b12dc661dd9bf5ea69bd0b207723. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:02:27Z), 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/CABD81501676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89c2ed4bc40635a12cc8da4c4fbc2306509b51df1b7a43c7da42f72f7cc407a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/CAFPW1810009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39530b75c01fd464b9994dec84734ab0cf4415d97853e6001f782b31e9b66e6a. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/CAFPW1810010.
En passant par chez vous / Les sœurs du couvent
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe94fa97a096026afa436b2a92e0fb94096199e7dcf50563b815c9000ea8b0cb3. Chain 2 (Bitcoin): anchored in block 957644 (2026-07-12T03:18:52Z), 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/CAFPW1810002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4aa951f4ea857f76fa8e378fa2edfc95b85ad06ea5b06d95a2696ae19de9ea9. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAFPW1820014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996fb4b556a4f2f651e16900ebcf3eded9145b21cc088c8d73515bf5e42467a8. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/CAFPW1820018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc711a116d3bbe2c242a3cd6d4655445cf542caa79ab3202caac393a183b22d63. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/CAFPW2120028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x931ad7de208e4992291f2e19707c8247f1275a0e8eec56b9dcd0612b4de6f116. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:11:47Z), 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/CAFPW2120027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc711a116d3bbe2c242a3cd6d4655445cf542caa79ab3202caac393a183b22d63. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/CAFPW2120028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd603c36f63a9f46289eaed464820320a12c73501fcf353d75c8982286f6d36ac. 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/CAFPW2120029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcdcfe5f16c23c0ed92d5ddc54c53ac48cf8c72576893a5eb42cf30c58accc4d. 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/CAFPW2550001.
La Marche Des Iroquois / Papineau (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70dcc5118133beb96a478a3848f37092d26c94d4319de63435777b262fd3c43d. 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/CAIM51600001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca09f6eae44a0e7f36011dd1cf64e32c783866a6edc2d0c1c012e9f915bdb922. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/IELLF2000046.
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