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 0x1884c63f381cd3ecb2d2dbeff92abaae9e0e97e2ae967f9e4dc127da89f54aa9. 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/865502f0-3046-4f77-82f2-41c3b73353a5.json and https://artists.proofprofile.net/proofs/artist/865502f0-3046-4f77-82f2-41c3b73353a5.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 0xbe3cffb3c0b1e7ddffd618e41ab24fe0ace3b89bd4ca8609522af452bb257280. 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/QZWFH2364027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67fec3d8fe47b98a627fa8d5ae144f7d717c5f45caa3af8148460d5f3d27ba3d. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFH2364028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6b9d8882c6a829757020d32f0787e845f4547fb3287e8b862331f77b8017db7. 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/QZWFH2364029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d6c9c6c87b1ec2fc3830b9e41df4bceb01ce82ee3205c9b19d63f25e1649eda. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/QZWFH2364030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b823b88912b3ee80d0c97f9efa78b7efa002c0497df178a5d8d70c33978741. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/QZWFH2364031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bc602290870198dc4fea845bc0b06bba1745967107bc109845d04df9b10e45b. 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/QZWFH2364032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x018c1570ec6325e0cf962f612ecf9a65173c4b90d22feec9747b5dd86b348946. 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/QZWFH2364033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8071eac899c3460a781e7e0c1431397da3b19144b7ba4d7d4bc010b331e33beb. Chain 2 (Bitcoin): anchored in block 960250 (2026-07-30T11:13:28Z), 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/QZWFH2364034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27105f13f77888e00fffb66ec955c3021e8bb52c6aa2714438b7714496737f41. 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/QZWFH2364035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79e18acb1c1f169e6f8fa41beda7322ec76f3ba563f7160851f415764eb9de5c. 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/QZWFH2364036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4f1d7e230747d870b3d1e4c1b0e62664a90366b1a168a50321913e4c150722f. Chain 2 (Bitcoin): anchored in block 960294 (2026-07-30T18:46:00Z), 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/QZWFH2364037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a16d3610f48e6b8a12403108ee304987349fec1a918a5a00fb60645ec94eca. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/USA560452250.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x264797fafef1ff1693466051c2e6eaedfee0adec3457c2b77d4b1ea3866a1573. 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/USA560452251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae8594ca2f2bee1434ebfebe39ccd6d109cd7758488a37692920cbba4ca2dc32. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/USA560452252.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fd9ce6aaa9c5bdffb0f6303eabf43380084e39c4ed952c26773a31356828e5b. 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/USA560452253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138fe2bc6eed535def684c5d6db89cfdcbc6ce09c08319f1b76050f0d101a710. 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/USA560452254.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf9563491ab803c60b0b0d091c4bfaf7e68b15690b2b2a124eab57ae427abf96. 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/USA560452255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75cb876383025f0f2b80f1c23bf737b87a9920a6f0eb92a12326a2ae1ba6aca3. 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/USA560452256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b57f66d9d13a0389a3e0a51b85363eaa235725867a7479ee94e2812431302c4. 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/USA560452257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9115e6b1d9e86239bb7a60308a3632e8e73afac5571932c00bf1f873aeac46c3. 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/USA560452258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a892ae35fef6f03dc90ff910460732a7c5190125d90809199f3bb23f2b8a08. 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/USA560452259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e3fbdf0b21f11569a210ec27f19d7a2c35b8e62e5292710fd530ab666b02aec. 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/USA560452260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52be98f5a930cb57d8150a271dcbe793a25f298811f74fc283603adbf1a6c9d7. 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/QZK6P2465070.