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 0x4693661533dfb79a0ca7306fd0725ecfd441ebc75fe07146826c01f9410d3a80. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42c6e225-3e2b-4c76-b19f-ad9da2c6a74b.json and https://artists.proofprofile.net/proofs/artist/42c6e225-3e2b-4c76-b19f-ad9da2c6a74b.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 0xd6b9a9a9b11f4e7f0a33157ee3818ab741736a1bed91661107bec20d74422ec7. Chain 2 (Bitcoin): anchored in block 958711 (2026-07-19T09:26:32Z), 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/USE831530846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea7741fc3e455e27b92987f8b64248185e8ab6d63eeb0cc71a536a5d465dd93a. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USHM81948417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaebfaa75a75dfebd83b5e776ed485eecd7f8210208a3b1335e52011c1bf24434. Chain 2 (Bitcoin): anchored in block 957714 (2026-07-12T14:35:57Z), 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/GBSMU7513802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7de741dca3aab297929279179b1ad2de93e6031deabbd92b39a0bcd6b703460. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:58:16Z), 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/GBSMU7513803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9c779fb755d3b02f13151ff482aa8e6a82c2140b4bc8a4917a0b5946a7ecf31. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-17T02:20:28Z), 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/GBSMU7513804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa897686a45994874cdd96422d1cedf8b4f6c5387141cc59339188a6b13d0da10. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/GBSMU7513805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58e513b3d4f99fd6dcdb0ffd1321437b784017309bf291109b1ccfec41c7e66e. 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/GBSMU7513806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57a0b714456d39513e8ecc04f4cb57b18f0e686f80c08ea03d40e40362917d2. Chain 2 (Bitcoin): anchored in block 957709 (2026-07-12T13:52:43Z), 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/GBSMU7513807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f8b21d21d438e33fa6011ca687d6f2e375c33a4150107cee3cfd02beca008e8. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/QZHNC2001216.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f402b0c9a37fe8a602e11f64cd1049ee7ea57ac385ff38d75c4326ee726b3d. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/QZFZ22183086.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1b98869520863ee2ee69fc5fa2fe1b9ce8234e6c3c7b6290aaffd20e4271cbd. Chain 2 (Bitcoin): anchored in block 958736 (2026-07-19T15:43:46Z), 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/QZK6P2473564.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f2e4df94e68eccfa5fd633a57c4ddd2edef795fa681583133280dd55be6167. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T21:05:52Z), 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/QZK6P2473565.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba89467d32f6ca134137f6e0dadc52421b29d81a43b3e8611f5bae892f2f3475. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZK6P2473566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc71575f3f4b54fd42f9066ee860d60d48f39ee08e6d98e7d80e07c1f4f7137c5. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T21:39:38Z), 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/QZK6P2473570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4607c03434163ac6e9bbc64226f0b778533e687bec43c4eb9d10ae135cf1614b. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/QZK6P2473571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51df516117c29970ad44f65888c6f4ed8b29a7c0bf4ef5be8e9d567494d6526c. Chain 2 (Bitcoin): anchored in block 958251 (2026-07-16T06:29:25Z), 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/QZK6P2473572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb666d391cc60ff924ee64cfc97a477792f70b869d7d1ddcbfa05e965da96f9e2. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6P2473573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1819a75c8b00eb32947fdb33e6c09df2a789c3ac930a70931b78209946781ac5. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/QZK6P2473575.