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 0xeff4687bdb239b252b4601d580ab74379a13079ce7122a1b1b01a2eedee977f1. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/3ed82051-41ac-47d8-8382-f7bd0d0cf964.json and https://artists.proofprofile.net/proofs/artist/3ed82051-41ac-47d8-8382-f7bd0d0cf964.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 0x49eda5af9ed4ec75c95962e63f3c5e8178385d1ec844f98f88b2dcfb89e195ac. 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/QZK6P2246228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26418fa7c250ac02961484ec84993ab73ab1148b312f1aca7b305f1fae19d331. 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/QZHN32295900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ac1e886f31c9262a23d90f27006856b461a7dda8429df61159bcfcb063f7f. 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/QMDA62108529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9c6aed8bb355745d3b2c5e31e3ee579998416b0ddb6f4ae67c1f910d8b7e15. 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/QZFYY2061252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e73d817b43d2f2c90eb9060fbbc1a4224da5ab54af01cbf0f0357148e3e5071. 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/QZFYY2061253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d195cd4264ebcb98eca226dc8dda25431da3d6c5986e1ac7761ca458c5406. 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/QZHNB1998055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf7d195cd4264ebcb98eca226dc8dda25431da3d6c5986e1ac7761ca458c5406. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/QZHNB1998055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6537b95a695ff013df634a345f886ea988d2547a61a818caa71063cccd64b5a9. 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/QZWFF2476756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaba36394aa8fd76aa3b7bd178ca143a61f49ebf7eff2a1bffc8e164bd25e73a. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/QMDA62114452.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117ace05b16b716292ceb4c928b6380735c361a44d72a0bc4af0af39a5c2182e. 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/QMDA62108527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65b22ef1e4c8e3f8a5f2151ddf55ee0a092f092c08245d27cf26ca14731ffc48. 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/QMDA62118567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaf3f42cc206572a8a7bea6de3eb164840a60ebaa1f5675b33783bd83242c445. Chain 2 (Bitcoin): anchored in block 957052 (2026-07-07T14:50:41Z), 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/QMDA62119889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc8554e1541b451be98555155850bc4898688739e3241307783d1f897594a323. 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/QMDA62124070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38361233d574b617a1daef58a4472e2ab564216619cd88a9bb4edcb58e3fc89f. 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/QMDA62118575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09ac1e886f31c9262a23d90f27006856b461a7dda8429df61159bcfcb063f7f. 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/QMDA62108529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6121fee1e09961c630aaa025cc33924e6bc17490ef385b61389e7606ce8189ea. Chain 2 (Bitcoin): anchored in block 958041 (2026-07-14T18:13:17Z), 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/QZFYW2081752.