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 0x3dd53bf5abcd564a7abd7b9dea474b3a7ce985b6befe193c582907c676f01141. Chain 2 (Bitcoin): anchored in block 954342 (2026-06-19T03:22:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/8205befa-b008-47be-a0e8-28c58f5949d7.json and https://artists.proofprofile.net/proofs/artist/8205befa-b008-47be-a0e8-28c58f5949d7.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 0x465c25ef7a61f8f5edf6fe49f8549110c9bc54ec8bcedf44cd679c595c173adc. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/SE5BW1400701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f01b8cab6bd441cc4927490b8befea2162a956c8a96456a68b01602960014. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25449be2b612d941d6c73c8d47c6f88d2834a0ee8721c7ff90b092e012f761dd. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/SE5BW1400703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eb9e877028fe0dedb9419e59791a052d47c2a91444f0fa2bc6a17e7446f36a. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SE5BW1400704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x176cf9cb50811665afe9d425721a3968b1a77ee4ab9db256052e0f4f42c02ac8. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91d56d8f7b24f6d494ef2ce5199b930bf693dd4bb20c369888b17c225c057a01. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a2205a20ade5f93964e724a53c81beb88cf68cac730683d09b13d70af373ccf. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/SE5BW1400708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6562c087f352e2db80c484374b010ddaddab2e6ee77fd03824fc1facc166b9b0. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f44716658c792ad60f5cf0eb976ab3ed1ad490b2161ca0a5cb9b689a8569f36. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/SE5BW1400710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70092da6d019bdabee14ed22f2a7fc5a99d423213edb80f88c927ecf3dc62571. Chain 2 (Bitcoin): anchored in block 960354 (2026-07-31T05:48:18Z), 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/SE5BW1400711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadad9a43809b7e6bf628f4904d6312684ef0cd4826208d6696df7278951bdf9a. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/SE5BW1400712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5854bcb8220ce34c574bf15af14656dd02720041cd47aead5978aa021d6a534f. Chain 2 (Bitcoin): anchored in block 957249 (2026-07-09T02:31:37Z), 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/SE5BW1400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85b261be5e360d54f6f58b3e985c1694aed1e7a8724bcf0271d98e2f8d0737f5. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400714.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9375b497128bee04640c93fa586db895ccc59b3fef273f83488d20ef980bcce. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1400715.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c998e4539c21b3d555180076e1f1f7d0e9af7048b1e98901268b1c1e9704a12. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SE5BW1400717.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee34e83ae0defa655be77807a60cb50d9be0efe839a01d29f8ac9a2d296ee113. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE5BW1400720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a57d112ae287a5c1cd5544bf32219f327e4bd7c132f869e45eeccb5a0925f4e. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE5BW1400722.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x399a596e6bb508d644aedd52516dcc8b858f0f6783a045c6d1edd6ce85b159b3. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/SE5BW1400733.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f9dc3fd936067e751fc9ddc9d75a44d370dc6e3d28b7918d557f60b1659400c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/SE5BW1400735.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb14828bf9962295dbefb3cd5547ae29258c10b70e5fe80b429324fb9c6e6efc. Chain 2 (Bitcoin): anchored in block 960506 (2026-08-01T03:50:58Z), 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/SE5BW1400736.