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 0x48a004f62dde4b136c4dbc352995dc7418cb50058e77388a5d39a7e5f7c2a49b. 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/f39a7f55-9fd9-475d-a8ae-d325538195ca.json and https://artists.proofprofile.net/proofs/artist/f39a7f55-9fd9-475d-a8ae-d325538195ca.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 0xa28646ceb8bd4d7549be0d9afddc8df84b5c323d83d29a03ba9f5fa95b3e5959. 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/USSM12103535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb001f5431dfa117fe31a038c77fa2d745e8d8a76ccb53d82ea34f5b0fbca29d. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM12103536.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b8f141b0610f10864170ba48f9aa6fd93007dd3f64cae2d3ad2a87bc2128d63. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/USSM12103537.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2b0a0ccc83df78716baa3ad928fc55fd6311e90f42334aab912fb4ec7635bcd. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/USSM12103538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb48af5ac5de7379258f83820c2f2f761122c93d4e835f85b73d935a5cb5d575. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/USSM12103539.
On Girolamo Frescobaldi's Quattro correnti
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x316bd7cff3203b31b2e05a2d09799ff52ec36193b64614d6a367dc90b3d21059. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USSM12103540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x928f6418697918d31aa67a035ed3c127f534d39449307e36be241fe930bd9551. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USSM12103541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb889061c3491e22915823c723d0c9e65769729be1f24a33863c34f53b95eb0d7. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USSM12103542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x654801a6a8cd3640b0ac6f3dde1c08cdd5a8154b2260985fa1e11a3f971b7e8b. 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/USSM12103543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded8c6f9009a378d7f68d7712686d9044c8b691c5be102e9478e14fd462f3f54. 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/USSM12103544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b58d61e888c2b8dbab346bf134cff313d9a4242439a5912be44a876914e867b. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), 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/USSM12103545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c0978b7148a5200bce16b9c9fc1bf602491069cb9d516d8a95be0557a48af51. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/USSM12103546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1961f06482ff82c1edc908b28cf19e5fb2c1f99c02a0c128574e0f4d69c9077. 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/USSM12103547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8351e0ff4e84708db9d8b0a034d9b737c1fc22281980b49aed2edf29a69db29a. 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/USSM12103548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c13a6d65ca72d2e56554ba0033e08632907fd973ff0cee58549ce64142fb57f. 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/USSM12103549.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c73f8324147a7de725ca0eb0ac535bd91eb342b00564c2f4a8c1038a82054e0. Chain 2 (Bitcoin): anchored in block 960266 (2026-07-30T14:44:50Z), 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/USSM12103550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8b0d1bc1b7119ae872042edfefa4ceb6ab1747344d238a9cab6082646afd226. 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/USSM11704663.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e75c1457bf2cc2341bf43d04634689fd316cccccc0a2400dd936f82acebfdc9. 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/DEN962100260.
Place On Lafayette - Monkey Safari Remix
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x647f8a2d08c6af77f7e0aa8772319fcfc27495776d3ee80bd5c95fa69f29e536. 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/DEBE72200253.
Place on Lafayette - Monkey Safari Remix - Mixed
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84a8d5a8188c5e8ac668553c2c27f4380a30c75c5ab751b64d74db3730f02605. 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/DEBE72200423.