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 0x5236f7cadc5daffa19ee9aafe4a0d61d5833b5678d8c2a6893e4fb0aa9215e58. 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/e84229ac-50bf-4e13-9675-5094cb271857.json and https://artists.proofprofile.net/proofs/artist/e84229ac-50bf-4e13-9675-5094cb271857.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 0xd84876e998e31281f78ee5f950f5e06947c86fb10654fb1e2ff11a058b66b806. 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/DEYX82215217.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb6d5a30bbf4ddbf987261ca565f39596635615ba7446b8136e8a1c8edbc94e. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEYX82215210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63915beeeb5fd7e251bca3316b68b5b3d1cf94c32e51ea6691402d21e71c1031. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/DEYX82215220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cb0f94bbc74342d2a34c479628d3c313a2eb4399217e9f4d4d0f88958fe8171. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/DEYX82215207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7174ba7b229d35865780c919be49bf6d50b94898bbfe27de1c347fa07e415fa1. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/DEYX82215218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80541113a63d8ed9e6ab57a1a26bcc1fa3eb610b9924c0b460e543a99e2b0b71. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/DEYX82215214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf81af6f1b51b559ddf207d01e5ff5eecf58223fb9adce1baeb0b32e705f66f9f. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/QZTAU2494630.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb302a9b6311c1468fae95db49e8269b44b7877960c609a780820f971c9bf8d19. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/QZTAU2494636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e408391b32f34fd9078fb6e14e5bca0f3186e6dcd4afad7be31053bb74c4bf4. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/QZTAU2494640.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd4baa54def46c27d1c0393f86b083dd125f8d1eefe7770611d3608584dda011. 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/DEYX82198301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4936a331d1e90c7e89aee2881b555d75d3ff1947b8a61826baad0ef48bb50b36. 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/DEYX82198297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb63df8242ff261b360840bfc18d3169bfa2c66ebc88e09fbd3894e66479d94a. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/DEYX82198295.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36e552ce8c6e71d00943b71b01a5fd629891177a2c4de272d721a7d20cc1fee3. 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/DEYX82198299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x79ef7a5df31c46e02c7a11a89c6b12b58164fcf048b25715b44489a298a79463. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/DEYX82198298.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x960e88cfe53f3ea69225b7c34318e6226877a5263fdafbc4d97fe59cf8d2c70a. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/DEYX82198294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ca85752fdab3e83cea366d122e5e009ed8629e14cc83204e6c133b241184566. 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/DEYX82198293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa795bca4de8fb04e4fd2b17910cc65cf80420aa930f6febc772674a98770cd2c. 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/DEYX82198303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x050aabdb644e39444d3f92eb4a663f815dfc080e257f934add9481eeb8c4cbfd. 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/DEYX82198296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30af767c5c7a0fd3f870411e7899fc604802348b7ea4c68113fa9f0c530fe103. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/DEYX82198300.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa89d01ac09178bc69829193cb3483128714b735d33a23505ade78c1e483b023d. 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/GX8LD2461253.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234f9960d617a6bef8452eb3a1bb1432b7cf0e359458d57734ad0fc574ceb3f3. 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/GX8LD2430756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe296d223b7a01c3b707eabed2b4881c5c3ad14481eabcb113774685985a8f9e2. 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/GX8LD2408494.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeeb00b8ecfebc8518531ba8e8669cb9d8b1e33409dd9a58edcc92b5c7417dbec. 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/GX8LD2479849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36b802d2d637c208563d77057c7725d1eae85123d74b14a5c7297f32bae1f094. 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/GX8LD2414181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5be157adb94638017285bbcd9c47e91b66cfa62597df533aaa91793d13640f7a. 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/GX8LD2458571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd47f28e23efe11caa6745516ce6933fddf2c613efb2183c050e6810755f45a7. 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/GX8LD2418297.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd710a0ba6de974474f67162a510e9a2b90597eee6ad341891c96f3d9ce983929. 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/GX8LD2494538.