Karkwa is an indie rock band from Montreal, Quebec, Canada, formed in 1998. History Formed in 1998, the group consists of vocalist and guitarist Louis-Jean Cormier, keyboardist François Lafontaine, b
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 0x785c7a66c94702320a76e699f25f5ce23c3f8986620598c86d485a8b3c6a510e. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/61e38d35-cba3-46b1-aa32-d23a48ce50d1.json and https://artists.proofprofile.net/proofs/artist/61e38d35-cba3-46b1-aa32-d23a48ce50d1.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 0x7f3bd3850cb6c213b248b0ed6dc31eda78754da984a8d4142ff3d8d6b7f4af19. 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/CA60L2310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79916bf66202708f8fdc3e8b1d129add9d9d5c98e08bcfc84d03d0dc9c58a2. 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/CA60L2310002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c2c90fe2612b1a7773f439c2a1ef3f7ca1317cebe06ddeb88f92867739bb297. 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/CA60L2310003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1d3435ea612eb34e0fd3c65e0dcd6b67af5f3ea702590def0eabc88e1648479. 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/CA60L2310004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb086ed43ecb7b67d314007c473c483fbb4be3d272be450dcb619d43619bbefae. 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/CA60L2310005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf68de13ea7267caaff980bb799cfa3cf36b2c4d640f549c5ae20eb38e0afb433. 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/CA60L2310006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89be6ab1c0204904499229e87ef9a7f1c90d9d1bec888fdd567915fba1096f7f. 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/CA60L2310007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbceadbb27f05f03c109954bcca9e5b6a43a8e919c5ca8c8f5051aa83d37d4d42. 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/CA60L2310008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84acf76270c65655b2bf892c435237ed53f977648d962fbef7a68d516751d1e7. 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/CA60L2310009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fb3d9c50ca42c0f2e6a5afc1b06d79cbe5e324800549f1c3090e3ca97822df. 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/CA60L1100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9921eb06c748ca36f1dcfb3eb4660bfac9b8f5847fa0c02e65a2c8a400489e7. 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/CA60L1100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec36f71b431d36f00b0eea0f07553831c10a2cd8f2bba27820b9945f38e5d4e7. 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/CA60L1100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70cbd6972a244b017bbce4e8f1cdaf00f84588d6415e9ab45f8be3462a7569eb. 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/CA60L1100009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7e56825106af86c41a4fb3fd216a9eaaca3378e62d802ec304df56bd8c96a69. 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/CA60L1100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x641b53bda86280665eced3e26e7eeb73ac94292c14a5f113c8d8d8382bca6124. 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/CA60L1100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24a4797774fd669d952ae29cb3455c18d9a718e5e1757d6debbcb2694c1f0340. 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/CAA500822401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30022fe55a4b7c8f3e65364833326fb4d1aa6c2cc344738f64eed5c730a04ee5. 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/CAA500822402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aed8a184b1d90b60086966a47d7e9d796018e9bae790ff159570d8edaccf03d. 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/CAA500822403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7df5691f8a5872089b9dacb7b808866e6d059ac28dc780713f5a2f977b0609fc. 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/CAA500822404.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69992c7831c04462a8913c00a0a0876f57ea8f2a2930af697c0a146ca5d3a160. 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/CAA500822405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd50014ebab95a6acda8fd333371a4103ba14932c49ce6c4420f99079205dd169. 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/CAA500822406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21e65cd2c8d2b9ac4f79df927ae22a7b9191bfe10e08b9258f88baef9c9e2599. 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/CAA500822407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa62266535f3f61f05bf0d2f953ad68e9efa3cb9c29cd0715dc956054e0493e8f. 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/CAA500822408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaaa5d21ec44210de42aec4a8497376767949573f780d062006b29d0a634cf76. 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/CAA500822409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d532fad3c8b02838693c268ecdba67e2a80f6e4bc72b8434871f6196aeb68b. 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/CAA500822410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5384ae1995eaad99945cac1bb8e9012d9f4b7c4be0844e6abef74fd026601dfd. 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/CAA500822411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53fbb60f158c0318e0f4116b4bcefb1d54929d0ee8722ae6045afc34c8046396. 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/CAA500822412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571183d8792136c946454a8015da4f9952ba8411b815c1e2806371682cb66fe8. 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/CAA500822413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e79916bf66202708f8fdc3e8b1d129add9d9d5c98e08bcfc84d03d0dc9c58a2. 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/CA60L2310002.
La Vague Perdue (chanson originale du film La peur de l'eau)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xede7b02575e55a9b71ec985a4e93756582f123d52df42d298385e5f13f7c1955. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAU111300214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec13b700932caaf3582658e2d0b892cf88e3be61fa54ab03f293f89aeb543dc0. 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/CAU111300215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a38a6691c7687a4e6175f6b6a0df07647fca52bdaa5d8b22f09698d4d3a1b0a. 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/CAU111300217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1e871abac52cd03c67343b4dbde6fe725fb064c34bbcd08227c654c42da20e6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/CAU111300223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8a5ee4f7f141a7670159931c8b6e53a64762be78b9d65628c27b3071855c860. 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/CAU111300225.