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 0x8f46cae29ce0763d189b9d693eb299c2713f4bcbebafa52cb0d8fb866db36a6b. Chain 2 (Bitcoin): anchored in block 954638 (2026-06-21T03:45:44Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d59c241e-7e53-4d20-889c-e866dd4feb6f.json and https://artists.proofprofile.net/proofs/artist/d59c241e-7e53-4d20-889c-e866dd4feb6f.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 0x891426bddc280b00758fec4bc3db38ea9a216be592a5ed869d14eef8a621f802. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QM7282350916.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf82d96b0f41442f93b5fa7dbde5432048973a6f9d2d69aea8e25ca4059f68c65. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM7282350917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7510a052ad01c1b0e9bdd826d48dcd1a82c0ed09e9f95c1f6df290b1cd716d. 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/QM7282350919.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04f3b724d3e525be1fda8908718f1ebf4953b97a0da424fbeb6b7510a08444ce. 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/QM7282350920.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2805d2b9f6ff651309d16d37b69aa40a6ace1ed74e67fa80f04710da8cd048ec. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:51:04Z), 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/QM7282350923.
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 0xd8be08eadef54d750ac2b242d117008a4d542c363d3f3ed8a0ef333e7fc20753. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/QM7282350918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050ae9ff8bff08ed419479073adf3a34711144574eaf74a69d868498fbb29b4a. 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/QM7282350921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdac03882ccb23a1d325b418ca3df21382e14fd7ca2ba052bb6c2c960b102253. 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/QM7282350922.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x208fc3f641a6804e7ed9a34099a79e80a60e27a3fb4e7d3dec55c6ed6169f6ec. 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/QM7282350925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b2c4119eec8072e715397e0f674dc4f64b0ebd8e0fd7cd2a5e2ecfcd06ada0a. 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/QM4TX1869568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b6b5a4405c54607ee0e668a9a991a08c1adeb195eab8dd8ad528ede9cbbd64. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QM4TX1869569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x459ff6623d1bc61e5ae554fc8b7d95114d7ba6888158eed1271a5ba72e19da08. 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/QM4TX1869570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f4c4557ee3439d78ac902d00e0d7e3c956a8139041d9cf93a4ecc9541c15e0. 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/QM4TX1869574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8cfec7b4ccbdb9c87b54b5604b79d6a4b8e944f43827d4ab17d7164d8e06817f. Chain 2 (Bitcoin): anchored in block 959132 (2026-07-22T13:20:46Z), 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/QM4TX1869572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa44d50d9e4c282d91fc1b741535cc73df6e5aca2ecb581f4a00f5e5829c3480a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/QM4TX1869571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4f0b9329a620ead8d333e57f967cbc479b833976109573d34aee43dc0e4f332. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QM4TX1869573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea2f66e69dd2655f412a9af69eb00facf767e5bfb0508dd9cb6e90a3f29ce26. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QM4TX1869575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31ab8e40b00e42fb226002c713c4625602c92638b1d856ee86af8a03ff97eb04. 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/QM4TX1869576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb570f3c661b1e01a08f019f1e9fd865a703e8a20379a9461445c76054c0a90f. 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/USUW81100061.