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 0x5c7ca9e3f871ac3160669fd31a3c6127c18597126654dbf901e86ff6d7605567. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/aeab1a86-4b32-46e5-90a4-157c941e900d.json and https://artists.proofprofile.net/proofs/artist/aeab1a86-4b32-46e5-90a4-157c941e900d.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 0xe314c01b64263892f1202836047776e1c94e36212d220b15dcc14c5a270431b8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEPI82444203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0471126122961a289a112309506d3f5a18f12c42bf24f4c8618851325719b720. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/DEH742422122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fe7fe80bc3ea4da1cf4be7486eb6a7d1548fc026e37507b4972b8baf315011. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/GBRKQ2427077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11298eddf5634b523206e6d1fb626cbeed18b0a54f52a5277b0a4126fada15fd. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/DEH742418767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdec8e39f5dde32bc7191fea38f963f0438730263709a6c5d599e05997e139243. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DEPI82405037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ad7b630b9d235afcce389875f8148ee194dffc8a38afe5bc4b70aa8fcd749ee. Chain 2 (Bitcoin): anchored in block 957011 (2026-07-07T08:25:35Z), 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/DEUE12487584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dc12506521741c413bbbcba5860d194388910aa4e55f37bff215d97a699e9d5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEH742400623.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c6de15868bb29c49beafe309b10c2b0fe5d942b3df57732b9c30bba042be9f5. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/CAENV2397924.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe63ae69f976c538fb79463ad4b8a267e662fcb21d396e8d1d92bd3269aba35a. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/DEXO32385092.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f20fcf4bdea9d178d087b4f60d5047db4053b229de74bcdcaee84a54f39f47e. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/DEXO22394335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c82224bf9e313b75e3819afb2b1c9477ffdbc10c250ce75154028fc621a37fc. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/NLQ8D2500085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2b2ad6f3edec92a2e4e6134ea743ec4959406a1a02c4bbdcdea2719f0f97a. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NLQ8D2500011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9888f07d35cb29359b0c3cb53eb95ead9610cc8afc892de67bee5a669f7b07e. 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/NLQ8D2500027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12e28f329c90885bf6d73ddd1419463038d1d6f0ba448eb96e70a1d7a82eea5e. Chain 2 (Bitcoin): anchored in block 957012 (2026-07-07T08:27:05Z), 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/NLQ8D2500045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce89cd63c7abcb0be802fdae346457a76837411df7d1f74e3a79b125d8b47186. Chain 2 (Bitcoin): anchored in block 960125 (2026-07-29T15:38:18Z), 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/NLQ8D2400021.