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 0x45009a4d71ca781e22bb1806ea78fb4bd37194b3dd4fd8956860e0486c6acd6d. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7c9da118-0d0e-48ac-93d0-ae45ecf8ad6d.json and https://artists.proofprofile.net/proofs/artist/7c9da118-0d0e-48ac-93d0-ae45ecf8ad6d.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 0x659b81d401cf3a9518245c5e3e6d8e7c4b29a5b04b8ff5e95791d5aee2db8430. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJ3V1459607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c24e762fb550bdd372cf45c4f34c5319ec188d2b79d16133c90212ccf70c4d6. Chain 2 (Bitcoin): anchored in block 958204 (2026-07-16T00:30:23Z), 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/USJ3V1459606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632cd758a10d426e7bbf723f27d058d9e3f0c9f63c617bc714b59cd50c0688d2. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T07:24:40Z), 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/USJ3V1459605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab91158400cc851cbbf36e7912aa86aa0cdde0eb9694e0935e1d2027d2ec4dab. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJ3V1459604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x62bd76e63deecc8f8d824a59e7c86229f58c216a673fc22a9bb4db0446acdbaf. 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/USJ3V1459601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4062550ceb8d498e7f68849aa65a78e94ccd87173e9b42ee9f6340eed2b53a7a. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USJ3V1459600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d32e3e26c134be770abdb50b09e58cb369b7140717e85930cbfb89fd52dc940. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1459599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe825370728aec888d19eb6a136d4d278b993b8862a4f6f8120eecd577602d84a. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USJ3V1459488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb18c5bba26870efcbec9c544bd6bb42e970f28d98722eb4edbb0e4992aae359. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USJ3V1459496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266c30604d4698016a84d8bbbcd25f2bda9e41f778873c419aea0e88a76d78e5. Chain 2 (Bitcoin): anchored in block 957546 (2026-07-11T09:35:53Z), 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/USJ3V1834844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5321b6634fe91cdbdc7fa76a2d87075c6ff4752be46e515c53acc2f46e70371d. 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/USJ3V1834848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa571814c0540993253aecf86586a332cf469db276546ed2f39f582f7d4594aaf. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:37:01Z), 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/USJ3V1834849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x147f51f12c079f2171604f5238426ed94408752a249221494426ca75bab58d6c. 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/USJ3V1834851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc742f54636c60a8d90fce73947ef8f698b1473e35d68affb19c363bec9bc388. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T18:01:47Z), 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/USJ3V1834860.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0464826d74036d99a0b9c122b0990623def624f1cb253b4c1030da7f680ca80b. Chain 2 (Bitcoin): anchored in block 957573 (2026-07-11T13:43:13Z), 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/USJ3V1813887.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x062af8c2307df06473b6e9b13783c05e490257a0f0a3a3ae08048438dfa4af97. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1813891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e50061770c57414fb5f99580be78dccebf1bceeb3f595fc2c68cacd04f102e1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/USJ3V1847215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x667bef1428daddef191def26f023056d50caea2bcb973c925d575d82c7f136e2. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/USJ3V1850408.