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 0x904df6c5f42de0c542f81aad5714feb0f4b63bfb83aa37a85aa174fba620d27c. 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/a852abda-d3a7-491c-81ea-6a7244c2f6b4.json and https://artists.proofprofile.net/proofs/artist/a852abda-d3a7-491c-81ea-6a7244c2f6b4.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 0xb3b087815cce431f21d6b57bc9f2075a8f373bb468d67de2552f0b57017f047b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6RU2426401.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a8f1019eb1bec8628ab8dd1c0fa1c360f4059a4ba5e82899eacb570d6ec33. Chain 2 (Bitcoin): anchored in block 960175 (2026-07-30T00:16:15Z), 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/SE6RU2200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5095def0c8543dc6643155999f50d80f488350114be297b4c7a77007909e5e61. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6RU2126201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f087ac5ca1c10a7ccf564a974f6435113a982d9c8a810a6369e6132088ccf11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6RU2107101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d2e28f8a45f360f2b8a7d4bf53293336e7dc6d92987d6309de41bd6d247b057. 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/SE6RU2213701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4810138808ff6aec05d27727a9b4e9ece2e479d21301e34396be9b8400d3a92. 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/SE6RU2225801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45e8f19745aad22a6ea8873d67d1c32cd570488c50a571a20966403b869624e9. 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/SE6RU2143701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7c8ad81dc93912561e0af092ee0c2ba067e3ece89c559e96e0906d00e2f0575. 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/SE6RU2226201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68b6feacbf936eff351f4f0fc4c963d5686fb250d7b549874783dda78e04a3fb. 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/SE6RU2200701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f464f10e45fda69396a184992f91fa8a0c2f340b45a331c37c809f24bc106a7. 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/SE6RU2231701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x463eeb80c51e3e049d63c66b892d979c10fbba1b83ece31154b5e185b92c4129. 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/SE6RU2226801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99b183c0361c6195b985ffc69664deadcb4d6f524078c367465bb9eeaba846d5. 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/SE6RU2225001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ff7cdd047654610f9919ef09c57e23af071c1e601bed5fb4912b9fb429b62ba. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/SE6RU2215501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb312eb3f71d1e2851e510976715dc8f5eddc9afea137f5fd77fb943e3488ba74. 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/SE6RU2220801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d58ca4632d769e1b2b3da05d95730d51ea5c465cf43616c074636782a60a734. 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/SE6RU2220701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2078d82e8fce25eea2e6b34bf6460ec9d18a778375cc12bb103000e4155958fc. 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/SE6RU2202001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x707e89b0175fdad7067b2a8677f83e55b9781962657a7debac9896423468f27e. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/SE6RU2208101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f08920140404cc5deeef6b0ee2735d46725ba562b3446515262689bf32ab6cd. 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/SE6RU2148301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab284af13c9ba1e08b36c18c1199186fc1548b0aefff8f0480d36ae7001beb64. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/SE6RU2145501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3a8f1019eb1bec8628ab8dd1c0fa1c360f4059a4ba5e82899eacb570d6ec33. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE6RU2200901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d786de6f18edbd8d42f0d983d0dc2fa4855e7088b07dd6a14a627a966a9e864. 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/SE6RU2118201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa987d439090985cf6d9292b48e7327d99266eceef3751d5af8d94d9a8ec5bc7b. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/SE6RU2122201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25637d5d26082c1a0c84f052d6e54d7648630a9df6e71ddece145cccac80d1f6. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SE6RU2117601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd39d9dfc8a11d468eefdfa95d55453878111ac6a5ede281164e5ba05b71c7a04. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SE6RU2107001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d02223e3af4b3e9a06c57531dabf3617e0d4dd4434aceb235f1eb87ffd330aa. 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/SE6RU2117701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2d7313389a4aac4cf6aaca74ad154ab6867b36d6f0938ebb0b8a9caf0ba560d. 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/SE6RU2103901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6553862fda6b74a5a98521120c0f4bea992ab18ad58002005d64f5eaa9477c4b. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SE6RU2109501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7020332516ad4a7f0f738031a324f1fef3611663ae708bd470a1ebe30d967bd. 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/SE6RU2122501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2a0bd0d49448842c94ef03ee138daf0458d3e64f4e3839334c4a139ebeebc35. 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/SE6RU2124101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x979bfa05f83d9efe61609dbf8c18592142f788236652aa1e6204485069ff0039. 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/SE6RU2104101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9b96decdbbf59bd453a9ae421cf4fa5e3a5ee3a65aceda132c7bca80a7fa354. 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/SE6RU2126001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3edca87151c91ce8f6f260c76a86a18a036860994c5008f31013250cb0035d2. 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/SE6RU2510290.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6d64638f259cbf8f7ff86931f74161daf891d348da14fccd187aafab00e8346. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/SE6RU2004901.