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 0x0d7afe1ad0b633ba93987f733e2d4f40694d9b78a69b22d3ea9b137d0edff577. 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/de7ae89e-bc2f-4ccc-a612-445ac27d7a4d.json and https://artists.proofprofile.net/proofs/artist/de7ae89e-bc2f-4ccc-a612-445ac27d7a4d.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 0xd0f6eb93e5fbd978a5b24b2d37b119ac61f4ad119e09d826b7482900b8947f6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USUG12310037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f6eb93e5fbd978a5b24b2d37b119ac61f4ad119e09d826b7482900b8947f6a. 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/USUG12310037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b6b18fc820387bbf3b4cf42625c43704c30eeaae4b2dfa6f361e9a5c0c95cc1. 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/CA5KR2368053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f6eb93e5fbd978a5b24b2d37b119ac61f4ad119e09d826b7482900b8947f6a. 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/USUG12310037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x375b6a3dc24b937de8c6c7ff027539a7d21e147c2e5be552aace1377694a3e47. 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/NL8RL2433551.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47e83a1f6b8b4f76ba47cc7ab0428b5e63d8551566fa5827f0aecb8d63aa5e8e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/TCAGT2307651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a29d1993243f2512c82e1661d2b3a50a455d6305f0766d103f7df29fc1276c. 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/TCAGT2336533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83ae22e329a9026f1aafb3df7d7133bd89a4e0b66171dfc747e134740833b356. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHF2315825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9457b2f828fadcd1a248c669a26d72e6cbf118564f494cc4e31648390993b3a8. 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/TCAHF2312896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x873dc9b5a4c637912c53d77d6749350f22e711e1d75f1b70c3eb04f667122986. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/TCAHF2312976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c1063ff1b53336b1aefc0a58e808a157cb1d300b16f0621fc0af0c7f04d2ee8. 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/TCAHF2313001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x786c61a60ff083e1dcf104594ee14f36b1b92df088f6ab96a1e9a6f6c78f85fa. 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/TCAHF2313056.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1191600e9c7df31b359f48efe4775b682d5ed453fbe2bd0e37e0032895849ca0. 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/TCAHF2313077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9b058ba3ece714e051ee41b69578cd6492cffa1b3b40225adadc7461845227b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/TCAHF2313085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3236185f7be2b13e8f59a172c28bdc11d9e0c4a48eb7b1d9f849d7e60f9eb8ea. 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/TCAHF2313089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27aec33facae02058dde7695786e168b4c62e5bb690eb52c3abad100df5fa615. 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/TCAHF2313099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b4a183299840761f10616bdb5c42e03151964a0e2787cad8199dd4d9ac17450. 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/TCAHF2313103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8923b6197628fd8fd6f86d37c5873a443d90844132340c5f27b0d24fd35a6b80. 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/TCAHF2313105.