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 0xac77f4211b0a226af9a0d7af77d17a8314c669603ddb49a1545cc07a7e975caa. 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/eed41449-edf8-46a5-94c2-ecb839f8021f.json and https://artists.proofprofile.net/proofs/artist/eed41449-edf8-46a5-94c2-ecb839f8021f.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 0xb2de5e34f17703080d8e567d516b6ff0be97e5c16580ce59b6274b0be2a80bce. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/KRF632105269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd2b6418739cf64eb6c7ad4985d9f2957eb04d82e58d47e91ba9e3aaa101c947. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRF632105270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59dbd5d238ff0f1b43e19f53e1aa3384e7ca3b5833950cf6fcaac179c8f9cf8a. Chain 2 (Bitcoin): anchored in block 958517 (2026-07-18T07:54:29Z), 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/KRF632105271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf691ee5268b4976bc4c1ddeb74ed76ed0f99b5d6a3a0b3dc4c8fcba6ada16731. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/KRF632105273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee8e85b6cef1b41bc27cdeb6dbbce68a340d98677d6274b8f444c560e43c563e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/KRF632105277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bd7315d7671a1f18bd3201581c349b49bdd8fa75c8f3e4508393cbd4d69b707. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/KRF632105279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7eb02924eb67924375a5381156fa668b34682f8459b8ff98f24d03d235d72ae. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/KRF632200769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe366c5807fa17e5e1d708fe5b7c82821386dc431d8967b1cadbc0cdf8d2709f4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/KRF632200770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57bf7869369a0f99e2091b32663bf9ac6d7e00671dd2a4b80ab052449b93b1e7. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/KRF632200771.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb8af136be0208ff6ee46d46678eacc18205773fccdf6f55435382f1b8a3cb96. Chain 2 (Bitcoin): anchored in block 957526 (2026-07-11T06:03:28Z), 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/KRF632200772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e27e517f7a52b54da7b4435ea8fa1ac831ab1fb7f1dc0a5f1524d0cb6186c15. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM4TX2388531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0085ee73a93adcc9b8d8cdcb60db463dc6b8c44d507a4383708321e60e776afb. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T20:38:50Z), 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/QM4TX2388532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960b9c43d611a656c98a6fe9971b086b1ab67630d8bdd0204cbb1690984fb317. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QM4TX2388530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5004e15009070f6dde09e59c38aba1537bc8777771bf0aff2b27ee0cc8e4e749. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/QMFMG2353671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60a59804854fb30e8a6ca7d71f70acd26f7b2d9f1a5706f895db209405887d5b. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QMFMG2353673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6713584402042ddba0ce1aa5a50061e91b2bcd8fe134414091d5868cec70a88. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QMFMG2353674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x684bc8d90e5aa0bad59b193b3287ce34df0e9e5b989ff6a70d3d19d3917c014c. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFMG2353675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x360cd1cd454939e0e75e0ad6251943c0290cd6499f3d926d27e973a2e7af02e5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QMFMG2353676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1738001946cffd4fabee2eb7971d8aed7b7b13dca6248518ef0053234cba76f8. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QMFMG2353677.