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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x274208d3db208d443b3f464bdb8eacabef908dfdd893692c1d75a966c67a0af4. 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/cc78c59b-97d2-4963-8ef5-9285fbeb7ace.json and https://artists.proofprofile.net/proofs/artist/cc78c59b-97d2-4963-8ef5-9285fbeb7ace.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a502eac41296f9be7dd7c4b4187496ae9f53490dd0667927923c6f91fea77a. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:04:16Z), 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/GBLFP2468570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50d772897d89f02b60a7f1f15017ae23b201899d3c86a4859c9a973b37c130da. 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/GBMA22400119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5908ceb4a69df831916d97c699ffaadfe7dfdf75829f4fd2cee4bebd690eaa. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/GBMA22400117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b4e7ec3239c6bed83effbc73aafa91819b6262d1c3d97d531a4f43e5ea44392. 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/GBMA22400113.
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 0x03d3040c90a9f0b7f2a24002c974f07a548fce14ced89e4f99bbab713166351c. 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/GBMA22400114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6c37ce60adac5825defd9e13122325413c7bf4001e92d1515d0bc27dd3da64f. 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/GBMA22400116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40b3df22d81d91197432e4fb600c1fa89c5cfaf3c5480394f562c95835aa92a2. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/QZDA52439072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28fa35150e8e2bf2be0fb7e7b6bff7ec949e3aef7e6a6e60328d4089db46363f. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), 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/GBMA22400121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64fc416ec48e9451030fa18c67f0564a3bccc9eef0e0e0b3e0918f6ce3caf30d. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBMA22400122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4662101dab8d1a58b7897b7b346c86b720e1fe1f284829f92fd980979cc76d7. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX53U2390528.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e63f9333525c9a3c966869c82c16c6130bf6466fd3c06d011e574da63c7d93b. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/GX53U2390531.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc898b250858aaa89d9808a5b0db440a565d2e0a841165ab29e120d1bacf6666c. 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/GXF9Q2505694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae97bcaabdd344ddbf599aa41fdd8c69765a9ed808a3e4bdae48e5f45c271430. 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/GXF9Q2505695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38c958b31208a9f6a039bec3d003429940aa16ea11f93f29283e9b39012dec12. 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/GXF9Q2505698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31488badf9866beec4c1a85b7d0b211ab1b167633a19fac27730a78a30aa28e6. 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/GXF9Q2505702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08e79f476c09618bd752c297379ee00ff9b64612d0dae595a3156eb76e9ecd93. 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/GXF9Q2505700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f78fccad24a111677721f4e14707ef98b13a53afe28c1001b63adc78351257. 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/GXF9Q2505704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29d9ea457057ee6c4f65736a0d904ab5fa698959236c8ff45ccb9112559e1e6a. 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/GXF9Q2505697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c56b4a4bff8ed0b78c540f23b541ab49186f0da3eb40d4a16dd742fd3139bd3. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/GXF9Q2505696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc813d699212d3ea7ffe02004cfee0c2a01c9cb7432dc2f3c4dd03898ef706e62. Chain 2 (Bitcoin): anchored in block 960340 (2026-07-31T03:15:04Z), 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/GXF9Q2505708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf02d5772f9b272dbd41c27385bf4444e25d5c794e3cad7f55a6dc728a86affa. 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/GXF9Q2505713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00af0dd336636f10dbcf9b0c01c98911fe4065979a80b3ed67b4b5deb437b0ec. 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/GXF9Q2505699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe1dafe0aebd5840f439ee67ee9d59b1b2e6aafa7af333671b5a96f577ebcd5f. 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/GXF9Q2505710.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1020882ed80f99b35357e3d5c6b4306ad7163283b9a5b272a1497db50691449. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GXF9Q2505709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b4bbfe0fe07fff7f0ccc7977a5b5c5267dbc9c141a6cb8427a9bb12ee810c9. 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/QZHN92458671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0d8d852f038fb96f5b0b6627be68e3d2ecfcc2f31e9e54e389d291a6f8ebd5d. 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/QZWDW2518837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcb78385be9cb3c4f8a914efc86f659e6ce960c5147b47f49bd770ee22479f8c. 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/QZN882555095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9270de3e7dc1ac942e51e8f07f22d1de2e6c46b5259ef2690279ae5da5c1bf58. 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/QZTB82480973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca8196a9aa580baec8f57e95e672c729448aa2b2f24f4c66734d0642e5b5e91a. Chain 2 (Bitcoin): anchored in block 960288 (2026-07-30T17:41:38Z), 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/QZNWQ2489882.