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 0xa2148d3f3cb358c2fca4b2078337c6dd485439c418b386d7f25681226b2a91d6. Chain 2 (Bitcoin): anchored in block 953962 (2026-06-16T15:03:47Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/2786c4db-a6a8-443e-aa4b-70702b104495.json and https://artists.proofprofile.net/proofs/artist/2786c4db-a6a8-443e-aa4b-70702b104495.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 0x81b92eeedf968585d7a34b758d4a6d950e9b04bef355c1bf0725500bd3e1b347. 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/AR8TN2100176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69eb0e923c1813544699091629b6018913fb418c476c6596ed943cc7e6b3487b. Chain 2 (Bitcoin): anchored in block 960473 (2026-07-31T22:27:44Z), 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/AR8TN2100611.
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 Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67400458af81f8b59ae78ba64df78112470d4a69dc6f3badaf3cd6c8d498c5f. 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/QZW9M2283278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7943fd12bd445a16df969c35e3f5a0b1c520183e5d130bb85b5b75cd099048df. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/QZ5AB2343897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1dba5f92c3c7c3ac196b47c168678afbd86116b75db237edc730c16f0fc9cb00. 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/QZ5AB2343899.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7cb88049aa15b9472d54e83bfd260065559ec07180695833b12f786cac8be7aa. 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/QZ5AB2343903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97031aa5a506d665fa2264a77fe42810582ac92aa5a1c85c0b3012e454b1e66b. 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/QZ5AB2343908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcb7752138ec466f9ff6141aa0fd20184f651bdfd35feb469ae644313a2e56d3. 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/QZ5AB2343909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbdca75d5587b43ef6860884c61fcfa516ed34e065e576b29093c644a7ccb20f. 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/AR8TN2000402.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73cd80b8fdfb3bcdbd6c4a12a19ad15f536e373f37b026804fd83990ad5bb12c. 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/AR8TN2000403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43380b95fe76d36eb6191fc90d7f1b207c1e07c1dde1775d6bc8c4532e053355. 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/AR8TN2000405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60f10d605699f92750d08434402ff1918601a3a5425b048cf0a85a7b49d73390. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/AR8TN2000406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1b3ec2d0b670b0005ade57a03365de9c0d0dcf89311bde611d3a529667031c2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AR8TN2000407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc31989270b1e3ea911b6d4ab21656d0c1ea80a19998c11ea6cce88f0ab6cf3d7. 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/AR8TN2000409.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdffc49aff35ea050870c3fac5fe2e7944915f0744f9ac7ad70e37daea56dc488. 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/AR8TN2000411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56733cca6ee309465b81f462c63601340cac05483394d17194ccdfd9bb8305a7. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AR8TN2000413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa93c3a6468cfcaca3b8291cced2fe1b8b00afe88566aaf629b3416ef498523fa. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AR8TN2000415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8891dc45f30828445ed7f53faa7e0a5194e41aca3160d37b0dbfa758a5e7b4ca. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/AR8TN2000417.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72d12c477ba654e8ed01f14369567a155c4578f1a19c66e03c033945b3a81e51. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/AR8TN2000412.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaca9ce96fb26b1b71f674139cdb2959c2d93aaaa314937d37bbab2f8ac8e28. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/QM4TX1962196.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6512d70eb8ac4637381b24ca8795ee28c9f157b599f8e0580f3ed6312e6fc137. 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/QM4TX1962201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b9484a2cca13fa157e2fef67d5f4ec3ac0e05b7def45d6b4ff7f12e8194512. 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/AR8TN1900594.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd70557afdf891e7f084ff5e7ae70a94f0ba3f77ef48c668db587609e945d8699. 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/DGA0H2313621.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92c944d603833bd46d91b582a4c84ec80028c838111adc3a0a5e6be13a63cb. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/DGA0H2313622.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x433590ba191fbdc5e94ca9e02d6917237564729957f87110e7dd8312b3dfbb0c. Chain 2 (Bitcoin): anchored in block 960456 (2026-07-31T19:53:57Z), 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/DGA0H2313626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cec544a09a2f39ec7216057eaee629bc69a21de5ba9dd0e31c3941fb8fe4344. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/DGA0H2313628.