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 0xc03e3c5e89dd1abcb94535df8d670e3f2f6ea080ac81200d70ca3f2019ae5a7a. Chain 2 (Bitcoin): anchored in block 953997 (2026-06-16T20:07:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a743de5-1733-4d0e-a116-c76b4b01facc.json and https://artists.proofprofile.net/proofs/artist/2a743de5-1733-4d0e-a116-c76b4b01facc.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Paul Chomedey de Maisonneuve : Montréal 1642
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 0xff8e2aca78331f29af747745c63e19c558a4225e07c958a718c55b3b04cd2bba. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/CAS741484911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d714b94a079df4b9596cb66196c59f8830a7c717b91de2c2d22ffa2cd01d41. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/CAS741484910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c78c507c771d7c5f6642b34576b19e701ef7942e690b2b905f4723fe31c0e4. 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/CAS741484904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeb9c1f6d40a4829aac746664f8108d7dd83224541fa9c5795508ce78a84e989. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/CAS741484903.
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
Festival en chanson de Petite-Vallée [Où la route mène (L'année Daniel Lavoie)]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x750b52d498d01090aca964b6e09d9ad3896fafaddbf03dbeb0a8098f58c59841. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAV700718403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8f9c7f0b11e341ceffe05baf1d3f42bd540802866fb918c964de92e08b367bb. 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/CAUH72403314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6144cdb3cf373f222b583df59b0862fa3fac9534f34044a8a90c9fa4efc8ee0. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAUH72403307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7717bbe8c907c900f2b987032da4fb1f9548e76252904d50adb2548bcf98694. 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/CAUH72403308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51d40b4992b3018afe9c02eb9002a57f7c7eab0dbad40e4189000246112f23c1. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/CAUH72403309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe75a80c4c38ad797e39fbf95e0c2237d7a44b0bd0137d9d2e19e782002c701f8. 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/CAUH72403311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0e17e2723e449aa4328db1d5caa5fb135800e18e00f724a36ff0f77925171d. Chain 2 (Bitcoin): anchored in block 960207 (2026-07-30T04:47:22Z), 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/CAUH72403304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbcb776ef2708332e56bc3b435edb78fa3ac5b659cd3079ec959bdfb1446dd54. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/CAUH72403303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb266e0a820e3e3b87576a9d8150857702f6b62754f2febe6c0bfb505be349bfd. Chain 2 (Bitcoin): anchored in block 960376 (2026-07-31T09:09:19Z), 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/CAUH72403305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e23c7b2a76c07014bb5fd925bf17e188f6d999dad84356b88f0b8c4178753a. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/CAUH72403306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48504ccf53a62836ce6c9c0d74f4df9220503e45385a51dbb68c6bda0fb174d6. 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/CAUH72403315.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486fd172c92279f8f364935f019ef2a8e9df306c062d1a4f35f711eb95d2bffb. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/CAUH72403310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c47606a8d22203cbca35ccda49ec3173a50fc750cb446401c6688b06af3ef22. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/CAUH72403312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d8944291b9ac0d467fec22e3b79e584922999c60104e372fc6394f7efe8e994. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/CAUH72403313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dfac6aa19b0264a9a5533ed2c0f658f6c3513f6b6bea13d9bc93eaaa7e14f9e. 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/CAL642075002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c857cd119fe14634a9fdf49f4e2d3024ba4c01d5c2d36a0f800dc18313cc312. 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/CAL642075003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadbba807fca01d52d9fb9a01757a81634f87f1e87ee7c50004dbbe2528e8a06f. 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/CAB741400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45c359efb4386557890f57ee2769a7432de036473ea953f6be0e0dadfe381fe8. 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/CAB741400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf506882cd26ce1aad1ecc459779954c0cbfc8707f5629c22ddfca5f9d607ee7. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/CAB741400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf385212727a7548bf61fba36bd3094371e7c7a5f3539c575762d68258164ad03. 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/CAO371148312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92ad0bcfb949bad6973ed43b8137403732761e9491fc5ebb4f3c271b1cc36551. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/CAO371148308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0454a57543c17da0ad92b7a5dd62cce10468886adf47924771c7ed0955ef246e. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/CAO371148309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25ef6067a4829dc2c955a84804509cfa959bffd3a819d7324f7b023d3f237dc1. 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/CAL642310001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd644eede58ac32074df3ff3fb6025a168c359a17f95f476ad1c0272fe6e026f3. 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/CAB741620003.
Les chansons de Louise et les cowboys du Saint-Laurent