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 0x11bf3386977085b99d322c7161f5b28710147b60bb50bde0157f5c6575ca0896. 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/98e34417-5913-4b50-b84f-711dc815cffb.json and https://artists.proofprofile.net/proofs/artist/98e34417-5913-4b50-b84f-711dc815cffb.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 0x8601039a6ea03b70028b0dcd17d783f0f590aa9e59304b135ff7099680d86d6f. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNJV2057117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc89dbe654d2cef08381692fd7dc86fcfa6bf62ce13ce676c5207d3e69350e042. 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/QZNJV2057118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a7c89f2c69e4f41221d8d8eef9c21d8e63dd4a851f784af580cfda2078ac049. 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/QZNJV2057120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6463481c3b5c9fd2b10187b233d5e6644bfd33058def6468f5f0f3c26ed32d44. 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/QZNJV2057121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6ee03860c62bd95772816803113fa5f97bc3e67824a821c4d1f77c283e33a1. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/QZNJV2057122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e002619dcebaa9681ece4c092866a7af13674340b9f9283892322a46000974. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/QZNJV2057123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x189267f63bc74531b6a9c04c687698ea763f0a8f73066a0adbbbac44489cfb8a. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZNJV2057124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c64375d20670a485a2136f31f68d171931b4a892f2a3a73dec32d24066a486d. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/QZNJV2088147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb013cfeb0f6f1010ad8ab5403977458ea2f49c890d6ce4c4bf9819c58c27259. 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/BCHRC2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedde5a53921672579770bb7c89498f810fb9a43e5925436e4877aef8c8d44e67. 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/BCHRC2100031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad72b03661e98c8f3d099307f9efff351cff043be4867678440537a30d4b9443. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/BCHRC2100030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27c5ebfe58b2d4e174f798d62df052ffdec2a3239e47e1baa28571c279042625. 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/BCHRC2100028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc99125f7f4519acca350ebef447408c9d0cb08df19a2d398e07ca6e7e568426c. 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/BCHRC2100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9684f48461a958077e5146cb544b77c49669e260a9961d31b3f1d7ff9142ff8a. 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/BCHRC2100032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab3c8f7eb406a793e53add913000ea5e420a4e79397d0334fd1db9ac39e10e8c. 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/QZNJX2136172.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x343feda2f18285967b9b2ae4923b5aa375169596ac7f51ec24f1656d2caa2bd1. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/BCHRC2200006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d8a30796213b151b495a2e644e35cde99c4bc4c466459059efc170bd1fe40b6. 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/BCHRC2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc324896da3a99665f4ebd604ad74e25af41d8cd5dd2a80da37896534e967b7da. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/BCHRC2500014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25262ad1d4779479634d44ec66206ac2caf5a54744bb65348041bcfecc460b56. Chain 2 (Bitcoin): anchored in block 958110 (2026-07-15T06:57:12Z), 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/BCHRC2500015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512f79ad4601e7c77da560c7e7cc5aab8e17fc2a87941d96680732d10548bc31. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T13:14:32Z), 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/BCHRC2500016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0fa9dff1c41cd428146580cf52030e351c3c54f299b528321d8d639a644bef8. Chain 2 (Bitcoin): anchored in block 958238 (2026-07-16T04:30:31Z), 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/BCHRC2500017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbaeb2da6a2944b143f13c2f7afd776ff5ba11e441e31c128ec094ab27b4bf1c6. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/BCHRC2500018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53bfe2ffa2c010cc2694cbb8347430716c063203c90c6785518f65a9ed8c2904. 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/BCHRC2500019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b284db9399b15479b048b3a54a28b1403f9939cf74b7e08711eabc0e3f1efa8. Chain 2 (Bitcoin): anchored in block 958331 (2026-07-16T21:55:37Z), 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/BCHRC2500020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cecea7503ae7eb91c23497aeae14a451d6be11ad6808296ae935f24e5677476. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/BCHRC2500021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf79c44129d2fefa7d65d4fe29bdbb3af177e3dfd2da41ec0a8c8e069dabf5a9b. Chain 2 (Bitcoin): anchored in block 958538 (2026-07-18T10:30:13Z), 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/BCHRC2500022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe482fd03f7e51910baa14ac95515e07e69cc703388bd5730078d7765e444cb59. Chain 2 (Bitcoin): anchored in block 958376 (2026-07-17T06:41:00Z), 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/BCHRC2500023.