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 0xd51e7019f3cfc8a49f6e5a3c57642ba1e2f7eacc9a7378c7acfe0cba52458964. Chain 2 (Bitcoin): anchored in block 953697 (2026-06-14T21:49:28Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/5ecc4cf9-dd52-4064-984b-c0e188a3e65e.json and https://artists.proofprofile.net/proofs/artist/5ecc4cf9-dd52-4064-984b-c0e188a3e65e.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 0x4f802877d4d4dcf9ad4379a1b84d1a531f01d05da07a534187da0e548c879053. 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/QMFMF2024872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8e1da76bdd399cb2111ed8bf7cbe696e49eb4937c1fd5e52564e7e91f239153. 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/QM4TX2164078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf93d96d0ecf5187019029e79e7bf744a2f199fc077595ab67ab91efbb650006c. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/QM4TX2164084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ea9ff8ce6a7ff49e50c3a3b2961b8d8e22e10504a1e3a194cd6375b81670117. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/QM4TX2164085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04e2e4a1a45af5a8cb8aac2b001a01a29c891519b0dce85fb45b66963ee0ab7a. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QM6P42094666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd90db64791e268f0ba8b07386dd65253aefb2e7055807a4f809727fb82217c. 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/QMBZ92045943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bf7f10ecbc49669faeb1d7d47711379b79739bd42fd8a57f2c6513a21a1feec. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QM4TX2164095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba0e152521b53d120a9ec427f3abc136d5913f492cf09ccf3ea7993c3b2abd5c. 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/QM4TX2164104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b42af01145434d42b81fd9022673a61ec0b31eab0f8a414ec6150433f9c9c9e. 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/QM6P42094592.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02b059d854efaedcf4f9eb7a321acbc6544659e0d6f344c5d11ff7a564239f9d. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/QM4TX2164109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda5177de5730c7196f1aa71ce5162f2485d7a87917444d54fb2f661608939d25. 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/QZNMU2495460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20da8acc21a36b0a1db1d4feb11a4702ae086705661ed6f36f2a20dda42fd91. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/USLD91738088.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef8d9c709552a377ef50c2fea503428a17f35dadf3255f014303d0448a94850. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QMDA62115383.
Jam in the Van - Friends of Clay (Live in Los Angeles, CA 2021)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f802877d4d4dcf9ad4379a1b84d1a531f01d05da07a534187da0e548c879053. 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/QMFMF2024872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dd90db64791e268f0ba8b07386dd65253aefb2e7055807a4f809727fb82217c. 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/QMBZ92045943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b42af01145434d42b81fd9022673a61ec0b31eab0f8a414ec6150433f9c9c9e. 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/QM6P42094592.