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 0xdfc5480171047ec95e89b0eaaece385c24d1fef9ef78e957004c9116ad529db7. 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/2e79410d-33f9-4aff-9aff-66033448bfe8.json and https://artists.proofprofile.net/proofs/artist/2e79410d-33f9-4aff-9aff-66033448bfe8.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 0xa6a09e67f56d822a897ac48dee4ec817abc82b92649243a026a4b45a3db5d0bb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/TCJPN2173181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6456d189a8d6facfeea25a1470aae034e39c3edca11bdadebb5baa880fedd37b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPN2050585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc3dd65a0a8cf6f67bb98b3aecca8e8309d6c628e46f06597d528b66cb56b9b. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/TCJPO2140414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fa437fe8623d471fed01638cfa4354d1bce1b2895dc14be7460b6f6b7c172cb. Chain 2 (Bitcoin): anchored in block 957834 (2026-07-13T09:42:16Z), 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/JPU902104286.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe44c53917ece94d941aa3eb0558ac002c8b318b6b7d00f00c3c6af468d350f49. 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/JPU902105204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf42f9c138cdc5c917e756f562a4d6e705bfe41c64554bf74dd9cfc2bf69b6e5e. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/JPU902205084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf0caa0aca6eb713a282c7b43a6580970ae43815f5979fa67c55e32bb836975. Chain 2 (Bitcoin): anchored in block 957874 (2026-07-13T15:43:57Z), 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/JPU902300425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b5095a52faed48a9dedc8c8f84783afffa54c240277fd2ef32679a3bdf14ca. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/JPU902301770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712af4f0ccdf62c6a564d0af356b143346bcdaa6a2a7b5ad643474ff5f6df6c7. 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/JPU902400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe58cf5cff7bb2d672efb32da69cd9f7ae8f816b5345c75fc342d4e3437f74a5e. 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/JPU902400868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712af4f0ccdf62c6a564d0af356b143346bcdaa6a2a7b5ad643474ff5f6df6c7. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/JPU902400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x533969155137fae1553e3782d1d7ad4ca08ac41fdab4fd5e7d971d66027597ba. 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/JPU902400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34a710115a5a0f1b0d4d07f850a60717a83f18f7a6499024ee1ba6e333605e98. 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/JPU902400163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef9936f4709e94c033c4e43a9aeaa69deb681fb787d022912c39370c09bb0ce3. 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/TCJPF2595816.