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 0xb006763674f319884aeb8b9ca07905f391154490d69fe517c4e40ba25992f66d. Chain 2 (Bitcoin): anchored in block 953626 (2026-06-14T11:41:45Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2a8d4059-6c8b-43c7-a4a4-588d662cca5a.json and https://artists.proofprofile.net/proofs/artist/2a8d4059-6c8b-43c7-a4a4-588d662cca5a.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 0xf701449f9f5d2167f6ba8eba892b4725593193917b6b6dc62a85577ca0f41546. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2104372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d1585d01a3d860c56237596837d18fea286c59ab9152235a6b564cb87942d93. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USCGJ2104374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2484faa03ff7c00c379624c7673a0c51921e37185499777d8ffb610d0a265fd. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q2097405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabe7e9d0121e6ce43e53312826222e1fc596c4d7ebb50db420a0f61427b2ab04. 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/USCGJ2104375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147cec9664f8260b92a18070fa9c7bd9090fe56b35d9702c1217677ce3bbe6a8. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/USCGJ2104376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac85a9c79736547089833114fc6d6a91cab9ccec29b994b5fff773aaf1878a7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2104378.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62ccc7cc2216cc6a867607cc33141a6b1151e9945a80ee0d6aa24c5f63c84b59. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/USCGJ2104379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15e6317c6b294490d6b38fd14afe8d7e5da74800ebb5cc6712561e16ddd4b35b. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/USCGJ2104373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48c9faea40858ba3b7ee49c2bf890fee2e8caa006013a778c1df963d2a48edcf. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/USCGJ2104377.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2a3c6adc962ebcfc715fbb50bf956bf708d995dc0936dc2afa5f05724c34931. 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/USCGJ2354780.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fe0371443f7d10fe8a2a339bd54bb271165fc10b2456dda82759b63b50f56e8. 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/USL4Q1865840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x568f45bd00ac1304aeb2bc1eaf574e0aeb17021040e72e694fd91972f05007a2. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USL4Q1865841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed0205cb70c3c961bc7e08c50633bba7491e394522c81f90439804f238d10a8. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/USL4Q1865839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7f6ff0fa5454bc6733dd133b1ce464a31c861f28529a1c050f2e9be23a2f603. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USL4Q1865842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a0e002e33792de563dc869c8b0ea7ecb8414f84034c24a8985777f1d58de6c0. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/USHM81792488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72ca7bc66c4c45d99a34dc36dacc413f1db79c49fac74f13439ab3fe9c734ba1. 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/QM9A81603879.