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 0xec94cf8a24cfbcf0156a9e93a1c87e17c6b54b183afebe1809d77528e9eaa01d. 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/5620828c-37dc-4ead-8076-c0123b54f164.json and https://artists.proofprofile.net/proofs/artist/5620828c-37dc-4ead-8076-c0123b54f164.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 0x4589f244e4447c5c1af46ff49d77edc3b011e0b016549c478582ab6907860923. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/USQY50940865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a95318f58499f56514722d92cae25bd38d5d82a1c0fa3f410dd5bff58ccd7cf. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/JPR221300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a95318f58499f56514722d92cae25bd38d5d82a1c0fa3f410dd5bff58ccd7cf. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/JPR221300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd828525c7619f094d0d8022508ab3332b02651ed5ea304276df75a38764d92ef. 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/GBFG92200408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e11a07b69efcb279bd481ed50290534470c8b20a3ee2b84d6f09609843124d8. 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/GBFG92200437.
Down ina mi vine yard (Rub a dub corner riddim)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06e0c2d7de5e09bb98ccc61a463fec14f20f74f3669e3e146a4a6144ae72eb80. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T21:38:29Z), 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/FR2X42553505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635922011ef115d02e2643f0c5fe90d01209f156be0d603cadecbe48ab75725c. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/QM6XS2511282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b9d453febdcba9a9c08d6d82c198f9185bde6e017dc3c27ce566c990a5716e. 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/JMA651000012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15c163a46633c4f09528c60ec8e5ee0b55e5b3d2f7f893ce86cf6d312ea5134. 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/GB8KE1853355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68f6fc9c8841cdc62f0fb7c98820cbfeadf5195bff08792c9770daacae7618c6. 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/GBDLM2200084.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24054023fce861fd50dd600c504c9a80a2c45902a7ab09bd386ce95cb517b6cc. 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/USVPR9500659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x67f2907c2ddb5f472b0786c1ae8ca55df551ad04fa8e8fcaf24d25a635f75048. 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/FR2EI1503070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00b8dcbc9043f1e62cff6f17f15f27d66347341f9e2c4145de9dd3895c88e688. 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/GBFG91900039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca45225ca78b34a57682f4638107947a5ed0f2e35922476ec0ed0596c5ba0255. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/USVPR0006909.
Reggae Anthology: Winston Riley - Quintessential Techniques
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb22cffc2892b96f1ebf4be9256c46b17d0e08530505e31add6325a28e438e222. 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/USVPR0916058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbac5e4010bab60bb4f3ac59bb8870e32f2dba79fa1ea67a3f716761d8eb0650d. Chain 2 (Bitcoin): anchored in block 960236 (2026-07-30T09:37:10Z), 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/GB8KE2058055.
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