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 0x917163406fe623635fb1323c4bb03116e3a7fce57085e8c2effe760f8e2c650f. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7a6b6883-70bb-49c0-a5f5-4a1c408e7e7f.json and https://artists.proofprofile.net/proofs/artist/7a6b6883-70bb-49c0-a5f5-4a1c408e7e7f.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 0x89519c28521e0bd4d6709796eb219014a0f8084ccaa81ce3fdf20e096750cc78. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2316925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9743ede63f9a24ed3494a22d5822d5582ce244ad493661c3acfd175d9ef1fbcc. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/USA2P2361599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaa6c0da3edec42ecc72cac75cddfcf78269c020284254b17bb5c1d989e13aaa. 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/TCACK1594915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9621be0daf13966294ddab0b55802cfd5fc6f39ce335ff4375a3a7b05005a89. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM6MZ2031696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69d02a3815f32c55a89f1fd115c2818db6981d16a0291c5357b8554ba70f61bd. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/EEHU32400387.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92c10d9d6436913b99a9ed0aa87ac79cf9ef43b3947fd90a05f570c26586c18. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/TR0061400078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefddd6a599b1a0f48d279514ecaaa1afc623733bfc26c0d77cc8704806b3b3e4. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/TRCLC2300022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebb6dda3bea2a41cf0cc07fa7370fdadb5ce63ce6604843dacbd51e88ae11ecc. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/USLD91750881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb797b84c23310d570f05d4213ee4dea316d063c54d8f698fdebc6730dbfe180e. 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/QM4DW1665661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e92f3aaab92c7a443045852660e93400fb31b51eda71b38071c7f4fe72d205. 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/QM4DW1665662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157641e5a0880a4729a14a5684a766311b79280da8e6e49b262375a1d983a43e. 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/QM4DW1665663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2de3395454e3b50ff97474f7bfa0389ab534baeb01e7e6ede2006392ddbc33a. 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/QM4DW1665664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x326d6c2114ae814a2427592793d5bc615defb204d47be20f9fa43a6df5c141a2. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1665665.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e2bba4b48a9af7000a5712b73adf7e8b2e283009e2593080fd2f9248e97bcfe. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1665666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4670318b99d1a646a0c96496cfc7e9d1484119e3bef2b2e363859ee70eeb7f9a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1665667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d53f850f7b397d83e3f97258ffe73c43472afcceadf3630ce40ba8bc2f2240d. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/QM4DW1665668.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eb3c4fb554371c2d83ccfef86d6ee609bcab294fc53e72551f975352a5e788c. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4DW1665669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe465465129645267a1b77252870eb47795819fd6fde995eea7335dbe48c82449. 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/QM4DW1665670.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db2a4f29072b7ab9cf6875357095cffdd7c4908f6767ef62ffcc762429261ac. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QM4DW1665671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc17b30bc073311c012fa5abd0c69978096c9fbd06a3f97fe6ce699867108b8d. Chain 2 (Bitcoin): anchored in block 960121 (2026-07-29T15:22:21Z), 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/USLD91750863.
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