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 0xd27a03a04f192dd36be9c550563c32030d43d955e3c1c0493d65d8a1de3fb511. Chain 2 (Bitcoin): anchored in block 953817 (2026-06-15T18:10:31Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fada080d-9ae4-4596-8863-d179ccdeee23.json and https://artists.proofprofile.net/proofs/artist/fada080d-9ae4-4596-8863-d179ccdeee23.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xb84f9325859c7731c861dde9f5901ad5b30c07ffac0ce5d6766748abede81ac0. 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/USHM90616166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71a6363daa9f73aa80091ff8421095a00743e48ebf9693b8da0496161e91b05. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/USHM80719779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf65fe6582e2f2779c7e10251fd68509c18f5014c1ea521f4f438cc020a9dc0e6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USX9P0751230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a1c81079cc6348c3b2b33449f0c8ee79653c752985728cdde821a2e0e477de. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USX9P0751236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7dd92e10c739aa618a83a9be1549e7f3c455339bddb023a3b3c29578439a3df9. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/USX9P0751239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcfc3a8923bd606287bc5efd5dc953c04d5aab2d3d53d2d066504d5a385f5677e. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USX9P0722306.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88e9040c9755a7605117469eca341eee6d7d2215973d15813aa5e13fff18fa37. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/USX9P0722313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f3e9ef11c0b017ae3dd4c2090890c252851a322ae048e40de19ebb2b021d268. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USX9P0722318.
DJ Hotday Present Lost & Unreleased Instrumentals
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x852d042609f13e8a8267c5509b4a0f74dd6f199c1e546d81f66769be2c386b1d. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/USL4Q0795309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaece9d45b0a46bb9b878a80f588c30dd463d3608543ed3cc8e964f98d8f080ae. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USL4Q0795310.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2371220bb76dc39cb2d0912abab0c15388cc7859a160c8d44bd54ff99f5cdb15. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USL4Q0795311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f9badde0c5b0062e8cd3797a09811a7476e40bc44e9ad0fc91f89369954c77b. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/USL4Q0795312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bd179cf8b822043700886bd664eb526b9c298ab5d92a7174ee4c26cb3157187. Chain 2 (Bitcoin): anchored in block 958903 (2026-07-20T15:22:45Z), 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/USL4Q0795313.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d1813dd5da573d8614e637d77690785ffe3304d761e8862aafc1729affc1d6. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T18:54:07Z), 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/USL4Q0795314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03201c8343caede2e9a958c546c659842a3e62fdbf3a322d0951bcb53f67163b. Chain 2 (Bitcoin): anchored in block 958116 (2026-07-15T07:27:32Z), 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/USL4Q0795326.