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 0x28189c497a48b8780b3d41405ef82409027dd9cadba3447a909c3340f33b2344. Chain 2 (Bitcoin): anchored in block 953827 (2026-06-15T19:59:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ebe16c1b-a649-4d41-83e4-d0a69a2fbc07.json and https://artists.proofprofile.net/proofs/artist/ebe16c1b-a649-4d41-83e4-d0a69a2fbc07.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 0x63f00536e2208d9b03c7aaaf5e6219c275fdc765e42f5dfd6c23525ac471b219. 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/QZTB72409220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x706656ca35f15b24692b3e5cd55bc21c608cbe9a6a0c62f4bc27b51bdb33d3c7. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZTB72409221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x347a2b6367324cf67fc5edefc158cf8478fe07530657ca4a5bc63a1966de4f58. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/QZTB72409222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xced76818a7adb9b6d76ca51bebc14729615433648cf949961ea424d85cbb712c. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/QZTB82439336.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d478f7f75bfd7568c10ab4b4afaffe983d270a34d212c7eb1ff60163b44d557. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTB82433933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4794728baf530c499e212b57f3b7d8c3eb75f499a737b97869af2ca49930551. 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/QZTB82436902.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73d0d228eb8f5f9a19638995e60d34855c410ed4842f9b018f208962b7070d16. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/QZTBA2431123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaab4d7745160958a3e499ea6170db1bde2a2b279b2a15bd093084e2fd11a24c3. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZTBA2431095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c930015b5ac939c84cb6463acdc1dd0106a60264046ea4c32c9273b2bae2f4d. Chain 2 (Bitcoin): anchored in block 958506 (2026-07-18T06:14:51Z), 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/QZTBD2418361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffc82469cb28ed1da4b731b82afa932ac5dcc589c408b97547b8bf336c76c3b. 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/QZTBD2421684.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97738c7d850c129c0c05ebd1d8f6c015918ed1ef7d9fc38d648393613df69202. 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/QZWFE2445348.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee0f0557e27e04e1b4a35efa385ea870453cd87d231271f478c04c3c9c641b92. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZWFE2446859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f8073efc5ce621b08acb74ef69cc11587bd7dc10398154bb68a2f601d0ddec4. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/QZWFJ2402111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae9437e1d7af531cd40a1b242511f65d6a83f57e8b0bfbe72d1941d1a5ba815a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/QZWFJ2402112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc721bf5e8854153b4ab8399ee4c5d534319b597a2fe02a679d24ea3d058ccda8. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFJ2402113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bcd9a5e117fafb247ee2167219e36797dc57dcb84b8a6d5ba1771f834ff0003. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZWFJ2402114.