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 0x209bad081732d49f7894dd438df3d2624d13a1ff0868e60b21a408af0fbfb210. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e3003e7d-13ef-46e4-83b1-3e2aef356b85.json and https://artists.proofprofile.net/proofs/artist/e3003e7d-13ef-46e4-83b1-3e2aef356b85.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 0xd5b7483bee22a1cfbbfeca48c20d1c521b4ef47555e2adc5ac179071ace37f9c. 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/NLRD52203725.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8f99d557fae48af0602e6d0cd2b56b60904b08c8b8b0bd5b2d36de792b69713. 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/QZHN62251961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa995e73814b68e1194325b5f24b5f759ed40a919a85b1c3ebca75f95a431e65b. 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/QZHN62251962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3752d5547fea796f31ecee028a63c8372ad31a774436e6089a62035ecc0d8295. 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/PLA552300490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00cd6c15bdc4567ba3b62c029eb255bb0f3ace1400a7423c7d0c2d9c6213238a. 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/GBLV62215147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcc6a200550e0b9b35b8c2a69ede527f7b403db704bf9bd9dbf37ee58a84e6b7. 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/NLE712200362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa58de04048b1482c092c7a70022389b92bee674e88f6d9493fb5c9b46d6a00df. 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/BEE202100077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af4ca92361dbe52b910ed6c2a6599858e27a2ccc91b4ede55e79079f3920aaa. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/QM6P42052592.
Samba de Janeiro - The Bootleg Remixes, Vol. 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafd3068ec661ffb262e33eb2270fff5f8af3c5454eafc62fc63dc3b4ac01eb7f. 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/DEPI82310424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bfd518498664c719da09366d9426158b99fc0e7087d2ec31e0a8eeb007d9da6. 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/NLE712200361.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18ab3773a0dbc1e049f77d622f87828f295d859020090a69573f31dedeec50f0. 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/GBKQU2562064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fed9eb99ed8e409bbd4f7b19a4adeee91ed39ec64f8066473cd6fcda578fa8b. 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/USLQ22180888.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5ec713b2005e9c18a360d34365f58e478b603c9f24ae82bb86c539b1dc6b49c. 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/USLQ22180889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3af4ca92361dbe52b910ed6c2a6599858e27a2ccc91b4ede55e79079f3920aaa. 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/QM6P42052592.