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 0x28399f634d5f8f7fd9ddfde5b9f4c6bb4ee1bef66dc1d9efe26a29f0276d14ac. Chain 2 (Bitcoin): anchored in block 953770 (2026-06-15T09:50:11Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a5a56620-9fc1-44cc-b5c3-409342bb8aa7.json and https://artists.proofprofile.net/proofs/artist/a5a56620-9fc1-44cc-b5c3-409342bb8aa7.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 0x0346c69aa1f2da7d5bb15ea3f42fff5a465b3bc7f2f91be8ad4c0d1b18e9edd3. 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/QZNWU2066806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6a1f979804086fff1863a584caaa7c009fe80fc816e0598553417c7aa633c543. 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/QZK6G2003177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e7d72be6e8f3d381fea058bc326b87b6bca1fab5e834813d0a68f26e6d2cb6a. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2060245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8473976574c948c8ba9fd6d3b059b48a6a684fffdb0a988b33ba687089c53303. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZK6H2008782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95069927572a419be1e1425d6520bebe76d4c57260f30975f9fefd205b9e7ffa. 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/QZHN61978035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f9bebaad1f357023f5b6693ecc68f92584094c4be92bba584aceba2205c4bab. 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/QZHZ32182482.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bd88c6013175af7818d1f78b1f676a559fb8c1127520825242e988aaee0b98c. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:21:21Z), 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/QZHZ32182483.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9d96cfbd9bdd79e5b6d336f727d4b2a14b2547644981fb26c2a91a139f4d630. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T18:03:55Z), 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/QZHZ32182484.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65f240fc937d15ecb680316602fcf54c7631f5f4df303ae12fb696652eb05211. 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/QZNJX2060057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb876b3718a398406142fb7366801c00105e0894882080600eb0ea014e2439a40. 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/CAGOO2033288.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5fdd93807948cf6e5ecabb3bdbe69ba737d016a857ccedbdeec5f0bad2a289d. 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/CACWV2066751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x901fe81f7b09da5c9f1e7fd788a334c12826c1ad19f1d581ce488caaf7adcf91. 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/QZK6Q1970843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95069927572a419be1e1425d6520bebe76d4c57260f30975f9fefd205b9e7ffa. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/QZHN61978035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbadc9f2e3b78e5b202e2b2f267283a3632e699d822c8c81de864435527b43daf. 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/QM4TX2212013.