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 0x96674db89ca011872aa98903baace7e044a3390cd504e5295e274b1dfc22376e. 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/80a3da04-a25a-44f6-b36f-9c25bd8c2797.json and https://artists.proofprofile.net/proofs/artist/80a3da04-a25a-44f6-b36f-9c25bd8c2797.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Strangers from hell (Original Television Soundtrack)
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 0x2893c0709d249e238142d31c5c0a4cdc17e4cf972db583851158bc7be0bcfd26. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZEKE1916862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8599e784eeccf123f4be9a1c286f2585cc1eaf9d24bc66b597cf582b386b448. 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/QZEKE1916863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6356fa200ff2759b15397f087dcc4e6fd5b58c8006b089c79f252e4b2921d827. 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/QZEKE1916865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4e502c456015201eef56afb27282f112b75e5a9541b8987640d2738c623bdf10. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/QZEKE1916872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa178dd827dc7dfefa97e0eee674e986b8d7b4d5431975c5a3ce213ba6f371c. Chain 2 (Bitcoin): anchored in block 957041 (2026-07-07T13:25:45Z), 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/QZEKE1916874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62395a99f3e3aa83107a2d4b6c64b938a32edec3a971e4ab7afbd464ec8a5410. 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/QZEKE1916875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fc4cebeef99cdd3dda49691119fc1dc6b70d70ad8b161f009e141828cf02db. Chain 2 (Bitcoin): anchored in block 960157 (2026-07-29T22:12:10Z), 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/QZEKE1916879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeea44d80f9a1242a6edfddf509f4aed871ca5c60e23f55784840dbd1d49a7b15. 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/QZEKE1916880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46ed8eedeefdd4ebdae50fef2d85c69b72ef621ff2f4e471714f47fd8a6402f1. 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/QZEKE1916881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd83620937a818cec6809867e981ebdd28b5c51ccea123eed83807775eae6b8e4. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/QZEKE1916883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c47cec4f150ea5cb28f26109886dcf71afd6e3e96b9677c5e5f4978de18262. Chain 2 (Bitcoin): anchored in block 959123 (2026-07-22T11:35:32Z), 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/QZEKE1916885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dcce8701999926acdafe4dcea41c512ee029bfb24108a7b8eda31c7d8698f9e. 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/QZEKE1916887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd125d462eae85ddf0672ce9b31c46099a8a9088343891ad810d1ac49b6bd9fc4. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QZEKE1916888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58ab40eef389a0927c19fb239e44da733341166bc7c5d97f2d16d04212c04c4b. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/QZEKE1916889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e211c29cdd4fff6c02f5072f2cca66e34d2695f5c548b2c73661c7468a5b47. 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/QZEKE1916892.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x133eb3abec92e2784ff6ab25370d9fba56386fbb43df462e9e7deb4631288ebf. 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/QZEKE1916898.