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 0xe10a872d03331849740da9a41c2d555a16abc6950bc04cc99673ac3072fde942. 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/5fb4e348-017b-46dd-9702-242b449a0366.json and https://artists.proofprofile.net/proofs/artist/5fb4e348-017b-46dd-9702-242b449a0366.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Live in Lausanne 1960, Part 1 & Part 2 (Live)
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 0x94f6f169c87a820491fb1cdea5028158e499bcff9bbf7b8a9bc409befffc1788. 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/USPR35612169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdaf5f08c90cc3aef121fa00b885fe62659585fd575488f9f53857f8c11e26d0b. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USPR35612170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb027c7f8988ad4de447863ea49391f6a8d98167d767d5b31238bcb1daa27086f. 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/USPR35602469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f49d8c0cb2bd38b146e1b07696f5ef91010c5fc88efb4ac13327260a61e762. 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/USPR35412034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75258d08880022f1f5d5dfab11dd0a7695b488de03cceee9866e72395823446e. 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/USPR35400136.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24d5362593ec02a9c42c3ba2d3e78b0dc69c2d6e6f80a132bd7fd0482d73dd66. 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/USWWW0200690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c26bfe6e8f70ede1c3360d8d86ee4dff7b92bd8f1526b6ee82fca6b2506ca3d. 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/USWWW0200691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2e9ece57bc987180e42fe43625e0c24c62e788f8a40ebf29c6f033133e77be5. 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/USPR35502429.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2ae13964127b2f402fc837d251e4e5c5f0008cef32b49ba55714e51079d5420. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/USGR10000219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff09c00a3b4a178dcc3b55e96ef8ac423f430c96a28cc2652ea09c13a6391dc. 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/USGR10000220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd676bc4000c94220d6b8cedfe3cf76eca8ba08fe5a483c9c9577a8f64f083189. Chain 2 (Bitcoin): anchored in block 960095 (2026-07-29T11:07:37Z), 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/USPR35602401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26eac51bb3c4d2b6801d116e0d75e67a6ddc09611daf39c486c45308735711e. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/USGR10000222.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47abd3a1da73909f4fd71c42907e73e61740cfd8f57e0c8d6f75fd43b06e39ec. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USGR10000223.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a1118633182da32bb4e2249370e63648680217dfb1ad4f7ef4b7cb1ca2f7564. 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/USGR10000224.
It Don't Mean A Thing (If It Ain't Got That Swing)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78f5ae673b246d238f41e706599175e0c18045ff5c764c6ab11edd70a87cfc4. 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/USGR10000231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d27a70c33d60e016eaab19dcdea1679b602e8f6632214f955ab0355ccb0c4ef. 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/USGR10000232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ceb189a388972fa7b4c41442d8477f3b7947380a99313ec87d5d869518ba402. 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/USGR10000233.