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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05e4edeedc3068923c93ee2d355b5cdc6ecafb7ad74e72fa5683fa1e6b0232f7. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/70acb916-e01e-4db3-b8ba-d413657102a3.json and https://artists.proofprofile.net/proofs/artist/70acb916-e01e-4db3-b8ba-d413657102a3.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 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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x028cb177b1bd32327a610d6d6c283e2ff693c4f74268ce9afead6a949b6d8c4b. Chain 2 (Bitcoin): anchored in block 960200 (2026-07-30T02:37:10Z), 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/BRVWS2300024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf53a3c0a42bc084ed3de884a77c598afa8f0ea4273a490ced21d362942425. Chain 2 (Bitcoin): anchored in block 957055 (2026-07-07T15:12:44Z), 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/BRVWS2200008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593a9ede35d2ab1a3c522f1b5bef21ce2089ecb455a6cf4ef22c3c13be74e1dd. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/BRVWS2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x202bd28bd726bd09af72a1a6554ce58ccead69b55e572db306636fecc31a542a. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/BRVWS2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30310099f4dc9af7c1e878fc6e6fd0ba02bb5e449912f7c33c7892962b0794c7. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/BRVWS2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04549b3a5c1ba181f898d4f8dd25d52f1332510f184e2d306ed59c33b1fe334e. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/BRVWS2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e6dc65a706cdaac8887a1a60563a53860b0a393b31a4ef25fa86350665ba79a. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/BRVWS2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25064b33ea390912b87ec707d761c9fb457d15c8e088ae70c4955336233de07b. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/BRVWS2300017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17251c3074673536ada89bc44d36a835f2cec2b3095e5129944a8dfedcfd73fd. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/BRVWS2300020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd07d14136e17a4ae17b081c96da213ac9eb6fbcc5dd49e83105a1fa0ee64fe2a. 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/BRVWS2300021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ccdcfdf186c53848b6c372fa4c68049c19d522363b21647c793509b032ba5e. 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/BRVWS2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedbc292d1eba6ed5b6e45e19b74438010be4f1b5240fe59a5dca2d4e971ef7ee. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/BRVWS2200013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc064e2067d2bab337c5aa6e2cb0a42ed0b5f9905b96de27bfeac659855bde26. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/BRVWS2200019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x757b8ec23884e799476748ea949c05da6814cd31f3f874158af7084dad776540. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/BRVWS2200009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff86326f9f49c0d467ae6171419768e9a6e5b5a52ba176b0c208edfc017fa93e. 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/BRVWS2200007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43653616bc52cc864daa3500d0eddb00b8bac1f81083a75c4d8275fecd49dd90. 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/BRVWS2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd23135f75f6a35d3bbf1a3b32d5d6c52d1106ab750e80f59aa9f99f1ccc32dfe. 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/BRVWS2300034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3bd2fccd089a632bc3766e4bbdeee6231be618deaa8378760044c9549b4a39f. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/BRVWS2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43653616bc52cc864daa3500d0eddb00b8bac1f81083a75c4d8275fecd49dd90. 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/BRVWS2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f90feeed1f5028cc908d0e5666bf515166a1c2e45e5f1508d16dbb7d18f4907. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BRVWS2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7f2c5f745e73919649665f97c45dc96a44e9c5618481b30dd59512c2bfef229. 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/BRVWS2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfcdacafa25569c9e818612e1f57e21451a2511ae1e76b497ea7deb768289fa. 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/BCGL72200021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6927a609b5c98a05303adf69a109ef60fa0f482c0201e188f5fa1c2b69cdb815. 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/BRVWS2200005.