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 0x71e1c7044c6a6feceba01d7f0e6bb146ea6d212bc1f5a427a12956e025526009. 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/b0069626-76de-4bde-a7bc-3b7a9e6f15ac.json and https://artists.proofprofile.net/proofs/artist/b0069626-76de-4bde-a7bc-3b7a9e6f15ac.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 0xd0ee64e07e35ae7a082575214854ae57765ea849abe32b52c8baf3eb09a4cf75. 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/CH6542373042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15b396bc938c3774be12fa64298673eb73a86ab149e8302d440335905646749b. 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/CH6542373041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6e7d62fa1fa8305c5650e992f3667ec8522468e50b994d7383475946a9c9a2. 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/CH6542373048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc03c445648ebc8e93556e05737208f1f9f69e9b584cae8131f8120e355edbba1. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/CH6542373045.
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 0xa87ae84baa466a1d035705596415759831f4223e30a33b125c9a9994ea59adbc. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/CH6542373047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15b109809ef9f325f934b984ff60571940f4a51f2975ac629a79a583e830f46. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/CH6542373043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbfeb617e9b66f74949c7e3b39ba1ad7354cb6e80a8170c4a9d441d730bf926. Chain 2 (Bitcoin): anchored in block 960348 (2026-07-31T05:17:02Z), 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/CH6542373046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd4d7313789f8960a0a5742a325d8fe92c3cc17e4e6253902635fa59fa8b8b4e. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/CH6542373044.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42fa414ffb06dbe229dfd3468c299ce4e28fdc3b20cf2966be8510d830ae2910. 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/TCAID2450875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ffc720fc72bae5cba043328a60f1159bab6acea2f5b741a594132397e808d4. Chain 2 (Bitcoin): anchored in block 959047 (2026-07-21T19:17:28Z), 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/TCAID2450938.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e917c104fe4e38023a097764f3475369b866670ce2c3a71d8e1fe404739067. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/TCAID2450949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28e917c104fe4e38023a097764f3475369b866670ce2c3a71d8e1fe404739067. Chain 2 (Bitcoin): anchored in block 958115 (2026-07-15T09:52:48Z), 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/TCAID2450949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb951ed572a01eea4a115046dbb87fc31b360f24b545a52e154ea851cfa642f2. 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/TCAJI2544179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb951ed572a01eea4a115046dbb87fc31b360f24b545a52e154ea851cfa642f2. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/TCAJI2544179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7807b5aac891efc791714bc1f5e4f473f3217bc88d1767b88f1bebddb6373373. Chain 2 (Bitcoin): anchored in block 958322 (2026-07-16T23:27:05Z), 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/TCAJI2551211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97899f874441b460abf463e7f8108e86559906b5691a10eae9c54310286a166a. Chain 2 (Bitcoin): anchored in block 957961 (2026-07-14T05:58:47Z), 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/TCAJI2551219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32033d6fe88196f71c83e59f4740e7e5feeab43967c15e0512f5e58e8f35336. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/TCAJI2551226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23b0eb25103c1a300e62d8e54dbd447872d5636199b964987a709a258b59525a. 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/TCAJI2551238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x231e0c76165159ac42918ca6d66dc7fe61fb9dc0e4b4067187dfc10016683b70. 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/TCAJI2551246.