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 0x2d93452937e6a0cca4a18498ebd85dfc4e37e7d1d3a2d18e19706bfaf7247e01. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/bb664ce3-70dd-4d72-852e-acb5d3baa6cd.json and https://artists.proofprofile.net/proofs/artist/bb664ce3-70dd-4d72-852e-acb5d3baa6cd.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 0xbcad4202d45aed03e3722d62a2c1e10a82a87cc5f464d80e45769c1300ecde9a. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZES52492892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccc9721ea91ab6f7f69a8326da05a16bbe8ea84fea458ba419864653ce4f197f. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZK6K2413721.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54aa11c051e13013645a532764c1201f56de171188b28c071a6f80721e0a0c3d. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/QZK6K2413099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb09e6d44614e0ff9bde2fa3f975bc7c0256904c877a894bfb31e0c6e9c894c91. 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/QZK6K2413540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5223e0b57fdd375a30d7a52dd686f6fad15adab4c1626d9da9eda8984115f9fe. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/QZTAS2414437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27d701f36d41567e29726c5b1b6561541361b36d88a09d6f69938bff28eb770a. Chain 2 (Bitcoin): anchored in block 957752 (2026-07-12T20:53:32Z), 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/QZTAS2414453.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x188f9c22a2d8a6fa98fce6f24fb2b9c2ae9b80a414f75925154e47cb9754c812. Chain 2 (Bitcoin): anchored in block 957756 (2026-07-12T21:36:27Z), 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/QZWFK2464147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a7835e4bee4672c7dbb30d4be85a6619709eed05d95338ec9ab595e23e86a13. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/QZWFK2539045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86755d837673b1954f466152c99cbc89d4d447a50d6ee16f345581b07833697d. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/QZZ7N2592194.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3d85d1f95a3c4eecdb8e6bfa1e7300bd40a9c0ff27873d0fca81ba4a84e59e6. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/QZZ7N2562338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28a14ba3597c3807c6bde59ad22736646c9d5c24db1b3f3fef88ce52abd04c51. 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/QZZ7P2512424.