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 0x4dad9b7b67b3ddf010d9abef63bb3a3422c9da80da69211d7673ae41b7c038fa. 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/26b955f6-006c-4786-b023-708d84e84f5e.json and https://artists.proofprofile.net/proofs/artist/26b955f6-006c-4786-b023-708d84e84f5e.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 0x9023580011efacc01327abe4f1a04deb5e7b796f8ab7047ffa7310de3b091bd1. 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/DKBV70506208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa41905783a0d553cf645e9bbd7b9b4ae7fa34998313b4789e404d816d5e0383. 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/DKBV70506213.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a1e3276035b7234262448d09b5b5815d750ca768c39d61b617db3840600f475. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T21:02:56Z), 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/DKBV70506215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda6eb67ee11ad398907380c862d321a127adbb9362f77cd1e090e77cfd03bfca. 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/DKBV70506220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1aabf5787ad3fc479a7a7e184ce4f11646541e349ce8d9952419611fd9fea5. 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/DKBGA9600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb2b196a667255eee7876b3e22268d18da28e37429956111d8a2bbfbe49bac. 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/DKBGA0000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcb2b196a667255eee7876b3e22268d18da28e37429956111d8a2bbfbe49bac. 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/DKBGA0000504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0878c650c6555babfc6d11f65651029240bee44235e2c7b17594f0aa572d087. 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/DKBGA9701310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb9d1451fca491db60562ed33a6710301402accc0a48b33c32e9f5fdaa31e279. 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/DKBGA9600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1aabf5787ad3fc479a7a7e184ce4f11646541e349ce8d9952419611fd9fea5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DKBGA9600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299870cd2b3101463bee465a2e34e14766247d9f491efbd60dbc6c094d2147ef. 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/DKBGA9600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c95ac63595a1c3c96cebb15fb808d6c4e0d4c538b3de91e7ff3e29dc0b36dcd. 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/DKBGA9600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced59a05bc1f465a8230d32215fe579fb7a759be1f3b91726cf18b24f6327904. 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/DKBGA9600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x13946c14b439e3cab4c685cea0755028955a29e1c507b0f927f1aa8c63332ec2. 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/DKBGA9600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb199bb44c3645dc5e95bc9bc69870dbb8d92ec7a23b371f9f67497bbc41c2557. 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/DKBV79500203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ab96c92af915acc49f8a8b905a90215fc5af6c29860c5d5c6c06e05e6dbedd1. Chain 2 (Bitcoin): anchored in block 959163 (2026-07-22T20:57:08Z), 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/DKBV79500206.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d4e07998b5b241dcea5b7012300d06a3f0b3894b08a016ba08b229043532971. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/DKBV79500207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf039d4addd8f4881dd5b8822ec9cfdae4b7b662ce5254dc633d8f90bb62c615. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T19:33:02Z), 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/DKBV79500210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9841ac6f3b62965977a94bdb8412617f76ff41ca4765de31b7fd3d2626a9fecd. 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/DKBV79500214.
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