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 0x107b0a57ca425568ac06f594f333bb98fc128d4df82b16fb6374209ebc5661b8. 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/9cd2170f-440b-4181-974b-2c597505b385.json and https://artists.proofprofile.net/proofs/artist/9cd2170f-440b-4181-974b-2c597505b385.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 0xb08f5958954edef0cf6ef454591f403c61c08b8aad3ebea9a063e707ad2f36e8. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/GBSMU2021746.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4210fad5fa44deb40616109e655e5d5e194a1128e66361b7662303a670ff1f04. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GBSMU2021750.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97697c2d9cf50869b40f719012ca2c321ad1dbd68f689a0a7dfd973f948a49f6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCACN1627616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5c990276fb9c8f71c734ee96bd3f372f370e0c3c3040763f5680d2ce10b2271. Chain 2 (Bitcoin): anchored in block 959355 (2026-07-24T03:24:16Z), 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/TCACN1627613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95ceb0b0751f028c02f58958145c38d6d6bafb32f9b90826fc7fbb6d6d56bd64. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/TCADA1778185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc803ce1bb90b2670ba141ad64dc179b048f57bd56c28dc27be1520032f96c316. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/TCADA1778198.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03f670400c300e34f38e4ea1f4f3bf79b6d6a99be26140ba9bbe32b75f7ab475. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/TCAEF1992077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2af5a82ff17bb8a0719750e76cf104703ed12b33c8e9e2fd9fda26405a8eaf1. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/TCAEF1992090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89a83c485d3640c4dbbd6ce25f2182371e02210dd23b40b755795ff9eeb7b8a2. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/TCAEF1992095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc61dc36348c96655978c3f0e4294d04817cc85e326a280929d4133b67d3d9d0. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/TCAEM1908407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffe31bd01e08c9ad15bd8f76c4a8aa4bac3624f667f9660a22756cbdcb42c31. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/TCAEP2072246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b99bfc1a949e85203df34a8905e0ea8e7219484049d0f06014413d84c4ad490. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/TCAEQ2015392.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f7faa8a37a4611f108c21f4275ebf06bc133b1d3df76bfacd40f90c4f9a6bde. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/QMBZ92091917.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x45decc3e3d1a69a2c6a594ad46e63a6f657039f12c1b9b876605330e8c92192a. Chain 2 (Bitcoin): anchored in block 957867 (2026-07-13T14:55:20Z), 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/QMFMF2133079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f026edcb90e36cf37e8f193293641ec07b18e82c06167690dc53b4da6ceb86. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/DEPI82221811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2697a4d005c9088eff36ca1a7b9b2cf7cbb3d44b8e7879af4d29f68769db4dbb. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82306774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa3c716cd5f9c52abb68b0007c11d159768222248ab08271bd3aeb70bb810b06. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/DEPI82308099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ddfe490ba37f98090af68c3291a27407eb5b9b04bec41f7cd0bd850a085c9f7. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/GB8KE2326911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a1591a4b8587fa4dca0a51c5a49b6d9484bbeca1f2cc0fae7c371af8c4a9ec6. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/GB8KE2323876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea187290b743fd64e02ef0d538a193e30fb54d5e782900dd8e0ca4c4518cefbd. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8KE2328278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd859779fa2f064063cf7e97fe17d3528fe308fc8c64fa122e68957a43b021e3e. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GB8KE2402507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04b2482d53da4c1b0afcf0b48a02d28f06a68b5a19105526c4f403940391a02b. Chain 2 (Bitcoin): anchored in block 958498 (2026-07-18T04:54:58Z), 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/GB8KE2404913.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930c212f2ecd6fbf5622751744020641aa6f79e1b00cabcd81c9f35b066cb34e. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/GB8KE2412187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74a8f4b85c71f62a73d88a1e851ad0fc6ad13fe4e8fb6a4e1ee2fb5e8c693197. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GB8KE2414284.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5ad0e245813316afe5bdecd9bf2591d93f8e2d07d5c59580e814842525fb9c2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GB8KE2414616.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1201f2ece96d4a963d8b0eff30890390fc0e5a2046d0ff033460b1ba91317e12. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), 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/GB8KE2425391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34170aba97ff573c907735879946200336c19b1ffa8f2f37a4dc6da4257bcb96. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/GB8KE2427311.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4411d562d604c93f698b47b2298db5a06be1b995b1b95ac459d9eea2217dfdba. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/GB8KE2428342.