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 0xc31a6e37e1a93ed6295444f82710812ae7e904605e683d300f83b31950b5f105. 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/c735fa3f-7771-4b7a-980a-d7386fd7ede2.json and https://artists.proofprofile.net/proofs/artist/c735fa3f-7771-4b7a-980a-d7386fd7ede2.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 0xad4dddbb9d4a23965cff3347398ceaa03ef4fba91ce55b57bb5dcdb801e8c6a5. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T14:07:59Z), 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/USCGH2040402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee244225d1aa33be68ad6d769ce87e4bdc4f3b7f638e92818813ddaa65feddb7. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USCGH2040406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85fdfbb576bb4858fb5d3c1783df086854abf82d7a825866c2fd5928bfe04c5c. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USCGJ2013355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e44fcbd5253bac0dc616f9537ea746449402628edd3cda61f36414430cce76. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:42:24Z), 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/USHM22075961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8442d99c2c5ba0c12629a24b43c53090ecf712af5afc6e70313d653da74d85b. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USHM22075962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x165e2e4e7c7debf1957d61a35bd8f58f6afd1d0d7c1255e687136f628454a690. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22075963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30131515ad2c02d99d2ce3dd27edd52b544d9f89f42623f765b5d518db9a1c22. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T23:52:24Z), 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/USHM22075965.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512fa47fd8f789ff94f17a3ce05d08f7002cc08b0c1c601215b8c5fa56cc507. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:45:39Z), 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/USDY42115171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7657b20521e1d7ceaf679a2c86e9f29f1a7126c1aaa6914e99dab6c2e0b0afcf. 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/USDY42115172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbec1398f7091cbc9b970830eccc135f174bfbd48f4f5007f8eaa4d0505b1a02b. 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/USDY42115173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2cee3dd9ebb4333e8e44435c10187427626fbedc52a0b538c98927bf4501667. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QM4TW2078220.