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 0x3fe030ee78888910aceaed5a1d2d10916778b45fd0fce05efc57283acfa2e507. 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/aff2ff92-bdb7-4e41-bfac-c94eb28a137d.json and https://artists.proofprofile.net/proofs/artist/aff2ff92-bdb7-4e41-bfac-c94eb28a137d.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 0x7aa7ad27f3f066e7617fa405f53133f1889ba47d319a513e6f85f83b315a7093. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/QZES62133529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x752cf8e698921bdcef4d25ae6651e5a14a007ca1fd874560f6fe99ff839242e3. 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/QZDA52209349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x418c8825f2c15aa032b2454c77bd3768e4877769e7837efeb3904975fcfdf3bb. 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/QZK6N2211454.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe74c911f601b17af63f5df36653fc44c9dabdf20b6b23cf2429eefbb11448eb7. Chain 2 (Bitcoin): anchored in block 958802 (2026-07-20T01:04:02Z), 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/QZK6N2211457.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08aaa0c3eeac5b02547cce5a5704848af8109639b952e2bd0c7f37053820c6c2. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZK6N2211459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x998633db911d71bb7c8ce8629dee2b3ccd9e66c33bd821ebb37605e3983eb616. Chain 2 (Bitcoin): anchored in block 958447 (2026-07-17T19:47:19Z), 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/QZHN92359952.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b8c7c6df7685f9bae5f12c71d7cbdfad52159ff357939cbd1160bebc461974e. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZHN92359953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe231af083a9b40973cee61a62d54a905566636a3aa8b61fa260dadeed26a1720. Chain 2 (Bitcoin): anchored in block 958771 (2026-07-19T21:06:40Z), 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/QZHN92359954.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d0c36915b2a41a0c85bd00f5019e2b60188292c7f06735c19497107a85694f7. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/QZWFE2391879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbfdcbab1fb9846add72f8b6da7402ce69fd62359548127a3239d72bd240a751. Chain 2 (Bitcoin): anchored in block 959002 (2026-07-21T13:43:40Z), 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/QZWFE2391884.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41128be0de47a0e0977da33a3bb495d89d69e34f8ded0dc024f7e73c4b37e57b. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T15:03:34Z), 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/QZWFU2415989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48433f0e00b80bc6e37bfe983ca674861c74b92c826dc2e5fc5280c40792a91e. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T16:40:33Z), 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/FRR642401754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48433f0e00b80bc6e37bfe983ca674861c74b92c826dc2e5fc5280c40792a91e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/FRR642401754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48433f0e00b80bc6e37bfe983ca674861c74b92c826dc2e5fc5280c40792a91e. Chain 2 (Bitcoin): anchored in block 957882 (2026-07-13T16:48:10Z), 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/FRR642401754.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c406a7474db295f5b439c2b67274cf569bc10f6b84ddf93cc27ba1134433abd. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/FRR642401826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x578283dc5029e103ab5b2239e8b9ad633bcbaf524dbcae5f91d3e70f53b6453b. Chain 2 (Bitcoin): anchored in block 959010 (2026-07-21T14:59:27Z), 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/FRR642401827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cd7d667a1ff7e05c6f31b4de1ea0139c095b567a768bd1ebeacddb7484e0b2b. Chain 2 (Bitcoin): anchored in block 958622 (2026-07-18T22:58:55Z), 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/FRR642401830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4909bc75cf60b2a61a79a6c2d5432b5e4893b1ef116d7a7caaf5f599976eb90. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QT3FC2588234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632a5c87df9f4f4b55c396f64b0b2c4ece8466586be95bc4390361255e831fb. 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/FR9W12215766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6632a5c87df9f4f4b55c396f64b0b2c4ece8466586be95bc4390361255e831fb. 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/FR9W12215766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5ec3c118d97d15538e4f26d06539bf2e4bb85b446a2e4570d2a56aa39e1fa2a. 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/NL4NL2161427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41b4e0c114a8fc5461779d2fc1bb00dd358b369db8ce9d5adfb627d5136e3eb3. 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/QZK6M2261932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10fd201a9e6fefbb47a2da1acb906343f2518289e1f97aedcf376a7066fdd1f2. 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/FRR642500484.