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 0x16f68d57943af131f68781bc9b66d6142398f4b344a2ec5c5a325f12e722e4f0. 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/ebc6ce09-9c10-48c7-a9fd-bbee7e03a0d1.json and https://artists.proofprofile.net/proofs/artist/ebc6ce09-9c10-48c7-a9fd-bbee7e03a0d1.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 0x49bbc40a9e8a2e347e07d4664d5e0341a55d2ea2c1c16ab998f6924a97b6e955. 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/QZNJY2165506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a607510f63a21152a0e16a5e74ad29d8fcf69779d7d744bf1f6fdba10611afc. 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/QM3DF2177698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fc897ed6bc083341b67f7303ae86bfcc0804f8bb75e3d45713eeae6d229c89e. 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/QZNJZ2196164.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x663a16e0cde56472f9dbb6bf4bb98d7072c4309ed372d03bb3444c9008e46ee4. 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/QZNJZ2196167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667395e4a64ccf64194785eaf8853af94245fc2eeb1dee5cb348504aed2be86c. 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/QZHZ42245597.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5fea15d30f05ce3fe3b859f4b44c8fd474e2148ff40e9034c03d5e3bb6a5d6a. Chain 2 (Bitcoin): anchored in block 958476 (2026-07-18T01:26:56Z), 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/QZHZ42245599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77acb0d232b1e234aa4a472d5ea992c4ac103651cc196fd166240ec6b0421f31. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BCJIR2200041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0354c4632ed555b710da8f83c7404a87018d97542d3194e80c205a577f736157. Chain 2 (Bitcoin): anchored in block 958722 (2026-07-19T11:03:50Z), 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/BCJIR2200050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd851e10b9f2865175c716ccfac2487ba80cfc64f99685d8ccd548b398822417c. 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/BCJIR2200044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x648cad9666ef02400743dd17d511e8ddc0687c469d56a39dcc184b089e2342db. 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/BCJIR2200048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c0749ed2f8286fdc09466990c23b67e57bc1da7ff91970c823c288a8a9da9d5. 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/QZHZ42269925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x179b7484aa32c70ec1f8c14aeefdddf45a0473be88c4794a566a92af75d0ee85. 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/QZHZ42269926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e8f71b837a32431030cfa38aa781097ce93a71bdde7b50b6956f5cc13d9227d. 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/QZMZ92216430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01c063e1383901e6661ef9e07c402ba986c92e43da7c3b38e5bd3281afb2ace2. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZNJX2421709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda435e496dbd06af06cc3dad3da3b3e196b8dc59b014cef2c67a0681c6f1e3b9. Chain 2 (Bitcoin): anchored in block 957569 (2026-07-11T12:44:25Z), 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/QZNJX2421712.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2171fb4c50761c0d25d28f0bb7364b3477e423e76a15cda1e7ab34d0a2fdb317. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/QZW9L2358521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed1a9efeafaa9092fb4885ea1ad6b709e4347ce86099e109087b8be34e9e0522. Chain 2 (Bitcoin): anchored in block 958436 (2026-07-17T16:42:22Z), 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/QZTPX2402611.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd023bfbde0405378c1633ec7c3b210fa31a5bf8c3c85a6e31a877bbd42777ef4. 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/QZNJV2553687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1bc27d10f04b2c067a877097c67ae402433574b66f987002ed209968810d1ca. 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/BCJIR2500005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67062daecaf6c040d3c46e298fb2e279b69c804d257e01b08d516149d418a505. Chain 2 (Bitcoin): anchored in block 958529 (2026-07-18T09:21:41Z), 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/BCJIR2500012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc4b122c5e70b38ffb2a425efbe46c5bbef5d99dcdba7719dec085396bbc9b1c. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/BCJIR2500066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b713b36cb6c131d8d2411926b3938903c4f82ca8c17fb4e855909ab50527770. 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/BCJIR2500068.