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 0x944340922fa939038593105ca7ddfd6fab8b1fd7296b6d0a2c65932fffc443c6. 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/b0b19a63-155a-4ffc-bd03-7dd6842a2f91.json and https://artists.proofprofile.net/proofs/artist/b0b19a63-155a-4ffc-bd03-7dd6842a2f91.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 0xf60ca9eee643e8b75d5fcc17092e7f32cdd3cabe2d7b208926d2c97119ebc69f. Chain 2 (Bitcoin): anchored in block 958650 (2026-07-19T03:36:41Z), 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/FRX872121014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030a39dda0b4c3773792d0e47fd9e83dd6a09627570cb122285399b312fd2bc7. 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/FRX872121021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71901bf1430980c4b7161cc3392f7ec3981f3a905c99a3d6395009b437450a04. 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/FRX872121024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e02c6c33edb6b7783fa5c3da479b358b75dbe96704395d3a3d5c393327bb835. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/FRX872121026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320776da466f4e5f84119547f0448131765f461936bdba71813c236b00f36b04. 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/FRX872121027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x898b6b6668372117ab948104181dc8d68af6166ecb95f820bd144c85cb9b5627. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/FRX872121028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x754edbebc52353b3a2b5a1deee96ec1392ace6e89ca00826a964ac652101b0a8. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/FRS182107410.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x203a15b1875a69f8296a8edce98da4074f56ea66d6ab104ce7d5de08f9c3ac10. Chain 2 (Bitcoin): anchored in block 958531 (2026-07-18T09:39:18Z), 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/FRS182107825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5991ccebdd5aa97ae470e112ef7a02b75ffe64de6b802862d72616b20511f80. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/FRX202237612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b3522774cf6dd47e4796934a105c3a32d5b5ae8ab0e8c0f03610ad03c75158. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/FRX282221095.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28701cbc62f9e7cb9b0dbd82971283b151dec436a8c79a6523995c0244f192c0. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/FRX202297963.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x101b0f6ae9276e25f54bd0d493f186a175c0c944231048f78389672cef16044a. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/FRX762252634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f539eb6fcc7edf13b3ba232cd8f687277b8e84e8a66c89d2d138b657fd43fa4. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/FRX762252666.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de7d3e53858f5394927110c6ea1ef4e1b0ffcf3cb98fcc8aec893147c79c593. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DGA052277055.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d2c05b1e39fbae3fd5cdfa9d1380962eda0192caccce913750597a4bdb6f3ea. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/DGA052277059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52dc5690cf29e4a313c98fe84231e500ea3b8296de3c3b5ec921a3f57a408e3e. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/DGA052277067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8bf0ca972f32548c4ecb366989447f4023b888a1d46e9da2d88eb2ba32c8ecc. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/DGA052277075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5fa4c6ca503462c0f830d0a56aada9eed50ef67a0db9e3d22cf5af39ded06245. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DGA052277083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b88718c95a51cf36fa124dd10e1fed3e177a8fd69d7ef90c8431a36654d7f4a. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DGA082230811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf470477b231ccbd208a675076f73986218e598650dbcdf73fb6ccdc6a77280bb. Chain 2 (Bitcoin): anchored in block 958680 (2026-07-19T06:04:14Z), 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/DGA082230820.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25be710711c17c251011bcca79d647a1ed0d129c39a4fafdb8800f214e561022. Chain 2 (Bitcoin): anchored in block 958667 (2026-07-19T05:04:54Z), 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/FR59R2363267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f4c9c4da536ab10d4fe4da728e41cc6b6e56e8b7d55e129430bb7b66b498272. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/FR96X2307446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9aa639f0e9cbec1718fe8f8d7573254f5f21ef53912efec90cbd77dde3bae57d. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/FRX282306804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3f12c60d24474be84bdda4c49757f85e6e27f5bd6c35b5b7d69360faa36e146. 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/FRX762327305.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78a57aecbc3706c58f4fed1db782bea9aac2e208b62f67e69da44f165ae0b38e. Chain 2 (Bitcoin): anchored in block 958864 (2026-07-20T10:24:04Z), 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/FRX762365858.
It's beginning to look a lot like christmas (Cover)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e4262fd5bd870c2ce31ae12fe3928316642c6096736c59e54049993baae11b1. 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/DGA0R2318941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0dc924d53fb1c6d77db6189ddfbfd13efe21e0c01d552a18dad2420b26c2193. Chain 2 (Bitcoin): anchored in block 958885 (2026-07-20T13:01:04Z), 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/TCAJX2507338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377f2b3528ffe9225db44a0ef356ddf52cd87808f074cf19d9dd619ab8f9fa92. Chain 2 (Bitcoin): anchored in block 958832 (2026-07-20T05:43:55Z), 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/TCAJW2597212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e8638ec37812146b11f74061ffe42f8344504d642c497360839e98af22e472f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/TCAJW2597239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b8ac9ecdf6a525409ce147c6d214bdc1bde027c9d21e160e6202025509f28fa. 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/TCAJX2514138.