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 0xcfac4b8b23ce313415f237bdb6a203ed9a140c8e668980c7b5e715324760cf53. 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/7f485636-2f96-4784-91ff-62189f10799c.json and https://artists.proofprofile.net/proofs/artist/7f485636-2f96-4784-91ff-62189f10799c.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 0x5076c347963717b8bde4e0b4b9b22ed89bfc8b5c017c70e8295a29aadc2cfb59. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52289886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41a1741a25175e5dadb9b5fdef1793a4c1e0ca513c7a781f5fea7188324cf5be. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/QZHN92325818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55c6c6937dc99b861e1505708c19623ec919198feb1cdb8dbe2f1e952d6a0c2d. Chain 2 (Bitcoin): anchored in block 958051 (2026-07-14T19:14:42Z), 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/QZHNB2381981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a13053a3decefa29acd9005619d9553a735d39c6d570d45e796e27c93b7173. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/QZWFN2333640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x766f376701c40de79f3c59082ab6ed07c4c19cc0f65f93038e3cd0120c2f4bce. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T07:18:40Z), 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/QZHN52484007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x980f15e55a2534a8ccf489852b4b5863ba1ce2df55fa4c3b7cdcf116bb82cd9e. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZHN92488490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x549413917e487e1ee64da20e1dea69432c4d8dc15769d76cc39a192ffb4a75ea. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZK6L2474064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34275f975e282d4518407566b181be522c4abc67d10f955f409213c91ec3bfa. Chain 2 (Bitcoin): anchored in block 958590 (2026-07-18T17:28:56Z), 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/QZWFR2450712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x821f921d621512aa99fc01692829d528f333485fff8b1027418d850054bf149d. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZFYY2514765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14a298cb8da71719d829ca4e13e1bfa724cea9b4b1ef855a18f9c7e009f4cb0b. Chain 2 (Bitcoin): anchored in block 957583 (2026-07-11T15:53:17Z), 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/QZES92538269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac19044a908fc096f081e27104c6cdcbde2f2e76dda14e32c0b95c5a78222229. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZK6J2560912.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa7e24bead1c1c43832d18eaf40e9c19639f36be6b35de1949bedfee1a338536. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/QZMEP2583953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86782dc97e310ba5ee387580bb72215db5373d2fa3bd7688f1d019e7e7d9c3ca. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZWFH2599319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23beb4fa2bf32989b5a3b527986d0a6d567b197390e55d9c8cf8f95d380252d9. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/QZZ772516218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3cf81137a8238c7032b4563ff997d76f51ec38c2fb8bb8b66748f61c7d77639. 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/QZNWZ2155177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7d848bd7658e35a388ada846b74a8032c4f0777509cc8292538b47a671280c4. 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/QZWFJ2476293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab6efe6771f7e85c9eb79351101f99981b2a466e8dcc1f9d9c19885aa5930367. 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/QZHNB2282992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd51d603da73f3509f428dbf2da9a5696be36008c5ae28b43fdad70a46c6b514a. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZDA42411944.
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 0x80f3553137aefff81ab7b8a9056dbbbbaeb92342632091fd8c66d94bf80e9ead. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZNWZ2313363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f5adba6c32981531c7a95f69ee2a49880190d3cd6d85db9e91db25b64ea588. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZFYZ2328198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1458406cf0be468dd48f01b31d40e67af313896d3e7700c429b2e7068c6aa077. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/QZNWU2186964.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe13c626b47bbbf2969c1afe4027c741d227d7b056fc2fab0b2691e4a8f410c45. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/QZNWQ2154639.