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 0x9a1a362a8d593e2c7ad75b61309ff3d236e7b15213481332efc3d7c700c513ca. 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/d773f28a-55b3-46bb-8cf1-0c7d1ff5a836.json and https://artists.proofprofile.net/proofs/artist/d773f28a-55b3-46bb-8cf1-0c7d1ff5a836.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 0x3c6c19477dd8fdbe56d310561495e05f491932f080fcaeb1892aa3a80fbd131e. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE66N2326687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea3d2b17ad2270b6eee9e3ba2e7907c962a81896bb0d2b09b5f656ccd375be7f. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5XG2405643.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6aa62aa00b2f4faa114c28a60c7a5ca857f6bc6a38efa6bfad8837863dcf5b3. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE5XG2405613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4b99c6c1569ced093c9112297d511e620169c24b87f7581bfc90c384a52d38b. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5XG2405605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a8dbb8a3b035f431d5e28911590a783fc5024accd45b41eb1c17b3107e3e2ca. 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/SE6TI2301667.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c3c80cbe42f7376b4f338aec9b96dd53951a6752dac12059079764e8dde1649. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6XW2365516.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f9194301de62531aefb1cc925a60dde26afcba8ceabc03f5f072232b785b11. 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/SE6XY2342046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd404aa3cd27306dc04f3a8bb464cabf5e880ba631b887ede5285abd90f43fbb. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SE6XW2356386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90d0b5f0f8818553379a92ac74dd7f8fa6a19157dcbe3678eac133cb1d9846a9. 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/SE6XW2307882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b4cabd6b53ec6dee057087edb29ceb122817e93d0923e0c7685aae1365f2b6. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE6I32390114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66532911da80be5b82f9b9d668b6c537a7c95d3bbc186b48568e7b26470fe863. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6I32483784.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c6c19477dd8fdbe56d310561495e05f491932f080fcaeb1892aa3a80fbd131e. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/SE66N2326687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa31d1d9160205eec6bc64736279ef494e2c0b49bad4f6059f8b3bb51b955e45d. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/SE6SA2346189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431a2b1f5d368f7834563db53ff409b6e8645df9f89ae2c8221159039fb7f458. 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/SE6XW2395671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b46f479a116e9e80fca95fa0de32fce29fdcd81701882a90f460a5bb04600ec. 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/SE6TI2342886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa92a7666c798b6abe340f772c5878b4d25c41f93354ca62807031c0f9a39df53. 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/SE6HN2306923.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59824296e7fa86ee54f515294195c66dc4efb831d3264fb78eb1e45c8172c484. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE5752325502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf1f0108a9d375be3ffc2d5fc7f1b8424a321cb848c65d27c86b37463634d86ed. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/SE5752224155.