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 0xecb0c1a46d9972440930c2a0b6984a2b8086dd99491243591ad03a5c73165bd5. 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/dbf6b3ec-bca4-44e2-b647-f0d785fe1f4f.json and https://artists.proofprofile.net/proofs/artist/dbf6b3ec-bca4-44e2-b647-f0d785fe1f4f.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 0x2669cd54101dccfe2a8f909595a135a9972db4100efd6ab84246f1649ad2a4e4. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/QZDA52176372.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06357097878790b178dd756edc6f60528b0127e83169bac5339e9e43fa2168d2. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:34:44Z), 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/QZDA52176373.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88c3b6581cc236ddbdf0045e8ee4addaecd03baa59553c501fb67f41b7e6a300. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/QZDA52176374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33efdabb7e0a75902b0088eaa29c804051e9b232d01e453539bbfeda0995302c. 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/QZDA52176375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb39aae1cd424f71886bb0ec584b75f0f202d81055abf4de944814621e6bcf113. Chain 2 (Bitcoin): anchored in block 957531 (2026-07-11T06:55:18Z), 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/QZDA52176376.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x152b7f4354027031434114b07aa3654f54a8842aad5819ad35f5ed77f5bc75f2. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-17T00:57:49Z), 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/QZMEM2141833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf985433f340f3f99c6ef446ea2259c75453ae8b5cb7c0d9c69f81fd08a9c66a3. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T18:40:20Z), 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/QZMEM2141834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03145e5db0abce442fa272b506c2a26c243ec431cb1486cf85ed3d5ae1efea1e. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:05:28Z), 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/QZMEM2141835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a57e2c797a564967a8e940a89c003d7af715a8993e09f94e0f0275043bc2df7. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:44:54Z), 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/QZS672189534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52db655ff42e734b5014c144d4f342ef9a88e5ad7924165ec0772b516f7051b5. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/QZTAT2123865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194013e0425a0c89d490bc1bf632c4d4ac815cdd73761e7134aa306872ab890b. Chain 2 (Bitcoin): anchored in block 958392 (2026-07-17T09:46:31Z), 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/QZFZ72208308.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67cfa9f2a0a644d77789eed6d45e1ecab90b94ba0ec6f2849225a474dff739ce. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/QZK6M2279915.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff721a3fda033ff9dc219e6073f7dafa0470ef1f4f9ca059ef30a59c332553a6. Chain 2 (Bitcoin): anchored in block 958303 (2026-07-16T22:05:13Z), 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/QZRP52223693.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x284362d2fe778c29b695349d2e5f613688d8a74cc89c40ec6bd367005ff31da8. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/QZRP52223694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6169a4465554303c008e18370cedecc2504a75ba86c051e17a56d104fb550ad6. Chain 2 (Bitcoin): anchored in block 959091 (2026-07-22T05:00:22Z), 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/QZRP52223696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa426a1e6fcd511821e99b7b5bef9cdd8638d195a7bb9eeb84ea706ee6c2a6d88. 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/QZES52337814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35f896acb63e5cd54ac27b91af4b5b266a889d7daf440bd0c2b82d730e50a6a4. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/QZNWX2316823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfeeabb3dbb188749ed0df3b7d6154dfc1380a350d5aa8d8919822b267dc0e329. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/QZTBD2384834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7fa3f9b13975f7af4ab3739176ca7eeef7159fe1b9d5a56d515c9d693a2b80c. 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/QZFYX2408018.