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 0x414912a2313ccf949f3a241142e74efa456d5876640e0b4b0571a036ded6b8d1. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/89b9222b-0349-4cac-9e88-b07da8f79605.json and https://artists.proofprofile.net/proofs/artist/89b9222b-0349-4cac-9e88-b07da8f79605.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 0x71e50dae4e6e7ba36037b0890c99a2fbfe51b7036478e3b05fbf92848909acd5. 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/ARA491500059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade6641c847d44585ef3d34f8d48fbc52f8165599111e17780f2533aac29c66. 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/ARA491400054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a87955b81f5d69cedeb9f86aa1340dcab6400d2603c48ffee82f3fbf70f8fd9. 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/ARA491500058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x633c90654d0778257f0ed7f25043f9694c5ac4d802fe9253cc83835e037b1131. 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/QZ5AB1642304.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9275693416cc332c9a0036a82ab2f34b8c0c4591d89793bc0f40770e7dcecdec. 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/QZ5AB1642309.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19a84ac7008b52cd0877d2c011f62dbaeff626c239a9d431247d0cee7af96ce4. 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/ARA822400672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef55dcf9a19798335366b550e12cb8d3368573b7ccc74f46268580b5907f38a. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/ARA492200192.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0ab0251e8e5bb2e15ece32fdc1c90035aeeeeccaea4697a8fa1879aafc116d9. 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/ARHXW2105449.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd487ff7ac3150b76df1a2753590ede4bbcdedab02b4db5fe9818ffb7344346cb. 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/ARA492000094.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa91e05c8447946c913e8001ef7022bd5713e34f5e6e9a3340cac6dd2fc6dd3a4. 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/ARA491900102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a3d5a5c98340150acfca3cce7810b83be9f10101c935e943f3d3270a6553652. 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/ARA491900005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e65c4574d8b22caaf6d79dc0433a393abe81652746f29a4dfeab44c8aff3be. 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/QZW9K2381876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e64b8f5e800e6ee586346b695b1318aacaf2eb93ae0ef5809630900f3275714. 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/ARA491800003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7b77de8a1d4faa65219bce0c2a7fc0c0cba9a6128159a126ce04e6bd102b881. 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/ARA491700064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46c463e99ae86dbdb87ad7128b2a31ac51161889378c116049520dd77b877179. 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/US7VG1735778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16c09c980b79add2304ed8faeb5281d7a3a2baabaa7f4a46740848078a8fd403. 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/ARA491400190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ade6641c847d44585ef3d34f8d48fbc52f8165599111e17780f2533aac29c66. 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/ARA491400054.