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 0x2bd561616aa4aa931a83bc5ebdf7cb9cf83a2e39625710d82e8c057a89acad4b. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/4861cba6-9fba-4c00-91a5-de806406af4e.json and https://artists.proofprofile.net/proofs/artist/4861cba6-9fba-4c00-91a5-de806406af4e.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 0xe75d18483c317025717065ec51c9f2109812ee51f994d5f593b176b90808a4f3. 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/DEPI82432512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4879a3fe9656ec1144e0a480dae1c747cfeadff0a4f9591346915fd77fdb684. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/DEPI82415415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec9f8797f7163468084b5b532e80b72da753513158bb7c3b79deba35ae17af75. 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/DEPI82412328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a3e302652639aa1226bf530cc8685ce8ea7d9a33ac98b44154185d1f191a2a. 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/DEPI82411772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x547f0c7800a08a4d2b8e75c320e09aeadd6a6623c365603a201f6a1279b7b496. 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/DEPI82406783.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4a10922112e4678433294f1a7ef7bd87169f68e056e7e4ba4cd2f3c599bc5. 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/DEPI82409937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfb698bfd748ab3e6030cd34174c27ad808ce58b148ff858067012f23a2a799c. 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/DEPI82418610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76cf067264f3dd4573ce078c6dd763450b9a14c0a1b1df254fff350ddc40b40b. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEPI82408804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1756a9ec1210d168bf3d605d650defebce144048394481e6ef98a2b1577b9d. 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/DEPI82407200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82f7bb9aeced75927bc01de59923006f16a7688b149a6c679b15a18d633c5b7c. 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/DEPI82404747.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec17569465d13e317ed637dbffff487fbe23df900dee4888ec57b9f0750277f1. 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/DEPI82405741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d98c6fc208de15fc67d4558d48feaf7e3e3bdfda8324a29117860221d08296f. 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/DEPI82407568.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d28f74f0ecebcd79062c30a0c7fa1b35b6881c4e84bed8cab7fabb019ea0da. 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/DEPI82411409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27450cc5bed59072f671cfd93c5eaa14b286c0c7de45fd6b8fa38cb6978741a0. 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/DEPI82326863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24cf79c1eaa3388cd11922b76a9b8e325cec1e53ee9c5127f81832953a0d5b2f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:04:40Z), 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/DEPI82403569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1099e9777dd714d2362fd9fccea4d3815bd5e79e0fc91350fe32027403dc2968. 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/DEH742503584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2dfe38811ff40097f152e4ae2102f0c0eed97245723e428132bb2f9d2c2cc33. 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/DEPI82312479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23b4956a40fc64c44ad6fb12a95f9fca2f574f6fda88d952ff9ad34f56fd40c. 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/DEPI82222323.