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 0x1c1ee5c381faff9706a01875eb995fd850f923ffde3ed69f5446e60e4ec32a3a. Chain 2 (Bitcoin): anchored in block 954013 (2026-06-16T22:27:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/34f1f98e-0b61-4a4f-8f9b-ddb9fcc1df14.json and https://artists.proofprofile.net/proofs/artist/34f1f98e-0b61-4a4f-8f9b-ddb9fcc1df14.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 0xa01ba878db9b4c0973236de316d98bd6d0f3e74b9a488ce4873bdc558a4f351e. 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/BEJS92000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91657c5c68105a01ce2ed80d6b0f16da8f23eccf25d95864e0d08403d43608bb. 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/BEJS92000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0aa465b79fac5ce8d8ddb9d29551a3b72c157ae65ec15c5a4815824c38b0fba. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/BEJS92000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe865b6ecc53eee732247b1ad21bc4f09322520167f72466f4bb206eb5037eb11. 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/BEJS92000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70a319d9845524f2d9ae0d864ae9c8d0f4a7d2082a2e17fcaac32d6570d1ad0. 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/BEJS92000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77e8cecf0be43c1fa8bc51c66815f8c5b0b2d731bc7efede6ccf2fc2f4f261e3. 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/BEJS92000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92484f71c3e50a9d9a19781c7c72888ccd7bcff6c072a8aadad3bfd41fe4fba3. 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/BEJS92000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fdfe83d33ca282467a78acfbd99d163cbe21375333a6900afaf4b7da2b774f5. 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/BEJS92000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7476d83e212c427bb04de82d85ac3c6ff833cf8718c62f52286ccfdf9cadef. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/BEJS92000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb166d161179c7ce1a80dfc9f23d00f6ef6c009e7f796157e5adac28ecaf49448. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/BEJS92000010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09d3e1f3f6b7480ffdce1081dbb425023b0f0cb50dcf404edc85d7f464394386. Chain 2 (Bitcoin): anchored in block 960111 (2026-07-29T13:21:01Z), 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/BEJS92000011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc0e80993973ff79d26afc93a66f60bd1b1e121e8872fbf310d3848f9bb7e9af. 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/BEJS92000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda10fcb5bb011332da7019005009bc80594956770c98c47e18189e5285ec308b. 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/BEJS92000013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x128c08dc346f1d8545efcc2e4c04fe40ab9d023ba24b73ebd60bc195eecb93cb. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/BEJS92000014.