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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1453e5b10e3be2bd14bafd12cad09882c2415bececbbb8e4724d989c587b53a. Chain 2 (Bitcoin): anchored in block 953605 (2026-06-14T07:39:50Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/12841976-b69f-4883-b6c1-f8d596213721.json and https://artists.proofprofile.net/proofs/artist/12841976-b69f-4883-b6c1-f8d596213721.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3743a115e7ce204e29b17d4d822ba95a85e50b8d7100dfe969c83779c0c49d36. 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/QZDA72407485.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3a59f1e61b947e30e8e27317b5ddf014723400f7316ee179e11dbb9789e4e47. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72407486.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84453048aa6b005617263b0bd69c86c373a20bfbf004b08cab711aaeb061ba32. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72407487.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6eb128daf9f19005c3e3f9155a9a44601eb57f6d31fd0d26c12664bf0c4bfe5c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/QZDA72407488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a19085d4eb86ae5e308f94cc0d7f91f2c4865bda24297562a2435ceada9729. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72407489.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa38a28bb2fcffa24385c749ce3ec363e881bb93f97d167adba860db75e2479ff. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZDA72407490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12a1c85fe5fa0e28bf103d3f1b1de735d37b3c0e7892b294e954829aa3ee3e7d. 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/QZDA72407491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x508b118b35217dfa18c5eb8d4afff15db24a7334cd3ff3ca19f979f4a8378759. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/QZDA72407492.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x975fc2d4b83c1de5091e913d97b5ec67379264d47c921dcaced9427b3ec5fb5b. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/QZDA72407494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0631a5a22ae6ceb27b44ff6d5bf8a6f2e5fc0c4832c2153213ead3bd1ad43fcb. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/QZDA72407496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9c3edf01075006810401c702577fcf00bc0fe186ff13350c00bed124ac46c63. 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/QZDA72407497.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f02708b265e883856b09a6c40cc164aa6c8562b6abcdb01906f566aa622bb1d. 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/QZDA72407498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04fe914800995c732623f95fde891a57010b75ceb038a544efc9fb9831cad761. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/QZDA72407499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa107bfabbb5f42ebda4579a4e0bb72d5fa091823efc0f4ed50f678ab76a25076. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZHN81907085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93bcde933926017c4a24eee2427b1fc0842b640e3644866580fe4044fb418667. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T15:00:34Z), 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/QZDA72407493.
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 0x04e388eb4687df78aa961c50facf39a5bf3811cdf470503ec9e24ad4285a92d7. Chain 2 (Bitcoin): anchored in block 959152 (2026-07-22T19:03:20Z), 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/QZDA72407495.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a664aa590fcd98bcf833be7420920701e20877d5a07cdca0c730b778409b03d. Chain 2 (Bitcoin): anchored in block 960183 (2026-07-30T01:10:20Z), 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/QZDA72407483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x182afb42e7a894b4ae58d10229db8eb4ece42a62599efa6605aff42ad69ab496. 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/GBSMU8887643.