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 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 0x3ae1a22ab5da6e42b44bc69f1eb3b9dbbf4a7cd914918085a6460a6b41a71335. 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/29474656-38fa-4770-94bd-3de5b9ddd855.json and https://artists.proofprofile.net/proofs/artist/29474656-38fa-4770-94bd-3de5b9ddd855.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 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 0xaf69c0bc9f973e48a2ab3c9d677622e64499fcfc2359fcad50b0e163cf82628a. 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/PL59G2300372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0df935eddc9f2c5f4505ee6b97e9a5eedd4173608cc701b6076206274b5601ed. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/PL59G2300345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadd61181efdcf34c522222c9099e92e3d06e1e1862df588d29c8f22cf63bacd2. 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/PLC062227996.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed009ffe461648759e88e9cd9c5fc9c5a95623f6cb328fe759fc4b81191d8906. 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/PLC062117087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26afa8ac4891d15a427b579cd3b18a3c7344629087fc08c82318785983c255ea. 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/PLC062229563.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb68b2332c053b7ffe559f216d86c54d0cad6e7f48e7ed84599cb30a562fed026. 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/PLC062229429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e21b680841b71ffac902221adde5ce06363923dc3209659cef33e42d860d063. 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/PLC062229561.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x832ec33d11aa51098b4e96906011ac67a874e63d037649bc54e396977ee18ccb. 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/PLC062229562.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab94a7d87ad4c3dbe8b402ba145ce36ac9ced518f16690ab0526a7cdc51901d. 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/PLC062226132.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1efd9cf31b4ef8b5087330a8cb4b640410772c7131c65ecad077a3a686ac1ff4. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062229560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6552348b3ebcfc20297cb20709e38d0e0b5277bc33b6e8538c3cd5e115c945a6. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062222352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd89b5f19ad099909e9edeb024a08998d78ecd83785715cfb2b9426325facd783. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062114759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd03179ab6cdb3c646d18ea4124e61c306477a12248edbc9733a243ec926cadc5. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PLC062116298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27df149dc6be8445ebe1b87d83a0fd0697a64970bc745031a946ea09beaf3fd5. 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/PLC062118477.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x571f1f940df6d3e4a639f94c664b1e3cc4783da8b43e37c8a53084019c444a16. 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/PLC062229565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf5f3027875eae27bc4f4da77b83cf13d5a7fe61add5e34e6ec0d95fcadeb8d. 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/PL59G2400380.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c047e170261a6f8194ffc21130bda1acfda658c65f8ef890eb5c10d4b41ab97. 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/PL59G2200260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6963718c45f29540846de02e6cd5445dfabb1671c44a3ccbace54ce375d15. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PL59G2300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfe6963718c45f29540846de02e6cd5445dfabb1671c44a3ccbace54ce375d15. 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/PL59G2300337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd795c1fee78040f64a6aa144d4e637d76f6061bb4635ed60f510ea88e9d79aa. 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/PL59G2300367.