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 0xf7e1fc3565df3be95a5d084fef6cbc5f05291a1ffa54f1bd28445d3d2b930131. 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/034f6fa8-8e70-4742-a8b0-cf92eb0562ba.json and https://artists.proofprofile.net/proofs/artist/034f6fa8-8e70-4742-a8b0-cf92eb0562ba.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 0x7de12b07a4fc2dda4ed1ddd71cf6ad2f3279dbe068540b54c4f33012c1871f43. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/ES5152200074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf8657770cd027764f7225e9e2f7b1dc2ae62fca9d35fae55e5503feb08cbc. 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/ES5152100677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x589df4465bac9f3e3d69ecce1a2417e3fd15a54d6974f69b386cea869f62f292. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/ES5152100880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ecf8657770cd027764f7225e9e2f7b1dc2ae62fca9d35fae55e5503feb08cbc. 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/ES5152100677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e6e52cdd166af538d2ac0204464cd4031471af844bf8af0c8640360e37de142. 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/ES71G2059027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fa5f61afb8e73092459fca99c158e849e2ac7a88be3553f1696e4e4e1e03df3. 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/ES71G2052658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7692f0628678c7f7e5adb5ca8094431b8f6c43915cb383bdaa1e0dd7c90ede4c. 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/ES71G1940122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3726981446d873ebe8ddd1cad6d8c4525a406e61cd6180c2895eb52b3538969. 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/ES71G1932220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff2f98cd9dc39a7896a6838a4df05139692dcb0bbdfd5c6734ff5dbd591434f0. 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/CH6541817947.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b609cdf1c9726b5c2ab97f8daae0897213eca8c78cbf697b7fd84447d96ae19. Chain 2 (Bitcoin): anchored in block 957820 (2026-07-13T07:54:01Z), 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/CH6541817948.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50c59e774fd94f8d29866d8f078669967b8656d1c19fa6926c3603331f22656b. 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/CH6541768130.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdead17f04daddec2f2338b7f02fcef1fee481174add4672207731e0eba6e605b. 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/CH6541765587.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ecb4a2c217c79336883907873af0f4b84b23fd64ed2834a3cb5b2f31e760cd9. 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/CH6541761366.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x794a3f9392fefa7e5cb1cd15c4bb3ae2b7627db48cb2488e17a65266a755aea4. 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/CH6541761367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5267ee3e3cfaeff6dac6c850592c6c8fdf22324d7e6cdaa45fcc7e524c9d0100. 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/CH6541753165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd73743788e557154193eec2041f1b58fec0c45b40a7e4eb3c2b89ba1045050f4. 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/CH6541753166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325d45d03491cd107b69ea6346efa906a84fecd3551529cee2ee1807a9d56e54. 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/CH6541753167.