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 0x0bbc3de469d3bbf74151d3809a49ac9d7edd697075c6d3f59c83241496a6bfc7. 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/b74957a9-e7da-4da9-881f-50d96bc10980.json and https://artists.proofprofile.net/proofs/artist/b74957a9-e7da-4da9-881f-50d96bc10980.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 0xd2e035934a5f12951126a4497753fd55490f5686870bad2962f23487c1a3b554. 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/NLE800510140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa431d7cd5b948d6f9c8ff0ea1d8f695909832a0d8f1815b269c7dbdd2167f5. 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/NLE800510142.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f885b4a9f348df038aee14df1d8b83c64d1d3d409ee9e3c82b550f365697fd. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/NLE800510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c30875ab3104ef62741a09570b900f35a08ec4051209121b7e262bea1117f59. 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/NLE800510144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x906b769d8b02ce37613fcc622a7997322e11d1869cb81b4563132161b56af3d4. 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/NLE800701017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2c65dc46ba5c26cd51155c67076e1c4064ca59de4ea04a8d7e2b36eb20c04ad. 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/NLE800701018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c70c1a9a005b0feefb76a2d0fb87d37f3a11dc9042f3263d0ef82e4d3d5d3c4. 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/NLE800701019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f885b4a9f348df038aee14df1d8b83c64d1d3d409ee9e3c82b550f365697fd. 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/NLE800510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c30875ab3104ef62741a09570b900f35a08ec4051209121b7e262bea1117f59. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/NLE800510144.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe77e0d362869a77fd1d3dce0216daeefbad9fbf5419c276daaebae45b6e9d24b. 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/NLE800701015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98f93f427da84f8d1a5a8a805f5dab8d5c6d8d084961d549638ad5a5247092ad. 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/NLE800701037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a97e67eb7f09796c6a682b014b4b5fc9007c5c444115f093d1dbda6feb9049f. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/NLE800701038.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21cc96b493942e706c39f244c763aeb10cd1863d0199890159693a67342503bd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLE800701039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba16de4824460c8d6ac8f7fac4bdc1acea877f3c965c7ee668510dc4378a21d. Chain 2 (Bitcoin): anchored in block 957805 (2026-07-13T04:34:37Z), 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/NLE802300027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f885b4a9f348df038aee14df1d8b83c64d1d3d409ee9e3c82b550f365697fd. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/NLE800510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f885b4a9f348df038aee14df1d8b83c64d1d3d409ee9e3c82b550f365697fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLE800510143.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05f885b4a9f348df038aee14df1d8b83c64d1d3d409ee9e3c82b550f365697fd. 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/NLE800510143.