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 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 0x1b137cb6eaeb9c8a943b32dfe3bcc0c7c30ff3149b72a012619ad5a81fc30157. Chain 2 (Bitcoin): anchored in block 953867 (2026-06-16T01:09:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0563a43c-ab84-4bd7-8a4d-985c6a58f44e.json and https://artists.proofprofile.net/proofs/artist/0563a43c-ab84-4bd7-8a4d-985c6a58f44e.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 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 0xe4ec08a1717d1b37937142fb1588ea6dc191181ef62783dfb06bfcd761d3c7d1. 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/BRGOA2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x713c057892819a28f8183cb6126d1e2c788f982b0ee886f9489afcda9fa6ade9. 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/BRGOA2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10455cf5f656d8e0f806a7c69b932e466328242f3fbbb5f9864128f090e58a79. 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/BRGOA2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c9eac64ac3d87b27ae636750ddfa817530239998efb0951ad6e71ddb58620c1. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/BRGOA2300010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe862198333b0d7fbf10b1f249417e74da02abef364babd93d1cd818d5de5294a. 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/BRGOA2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xece3ac7b6d716337cd9cb7676929d820b8a46435a6fea1275619e42781b0c544. 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/BRGOA2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf60a2e43dcbdc620aeb77012a49bd742d4bd76efa3b66cd7003ed5dcd4d401f9. 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/BRGOA2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42095c3eb6d9fd8902b828101f76d67728831f3bb2a3b1a3356290480269e1d1. 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/BRGOA2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51ca3080b227fd8db75127b5195235c25545c3dc88ff927207cf35ae8e0b3f5c. 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/BRGOA2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd16dbcc01e447d571dc112671ff79095f4ca3f511d8c022dfc5c65ee86537c4. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BR8ZI1600012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4b7d9b8d6bbbb3b7841435a8cb83915dce325e22c8e9a05071f3e615259578b. 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/BRTRB2306140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa967342baba9ec78c1225ef03ca144eb582695353eaa5460e13417b3efcd9e24. 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/BRTRB2306141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dc89fb2c620b52e0b0f3f813a93f129c5e26df553cb36bb8d424f996e4fafc1. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/BRTRB1623824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9506d4a9434c28012b43ed11fbbf4b3b4aa6cde2a0e37a56465f719f55e7b58. 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/BRGOA2000001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5d412738768b802284eabe2e825d155313881edb7e6b60e08eb4b41b369da9d. Chain 2 (Bitcoin): anchored in block 960145 (2026-07-29T21:13:37Z), 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/BRGOA2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d47f2ae15929b45e26119d0ae22dc8c11f1654dd350a04ecba5d894fce3750e. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/BRGOA2000009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x973913201865736cd6252535edb67fa031ac78ceb6dc65ff69e591b2feda245b. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/BRGOA2000006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc49216adf3eb8b2fe26412c60c375b1dbd9f50e4973d72759f22703921e9398. 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/BRGOA2000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06df01f3723bc4458a9a8f89c5ebca6e2841fc37e067c17bd8c253fd824337e8. 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/BRGOA2000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3934796c420b200e4657221c6eb04ead943ca88364e71d57142bc94effb1891. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/BRGOA2000005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10d1700666f7d4bccaf346b8e55c9d9732e0d9c9f02a16c6f6e515f04a25b551. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/BRGOA2000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb035512e98a7ef64dbf178fe98c368fa4ca16560bba004d0069a1ccc7ecdccd8. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/BRGOA2000008.
Two Strangers Trying Not to Kill Each Other (Original Motion Picture Soundtrack)