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 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 0xb449392f7909b6ee8f75cfc79f49f35a33a3fae5fac8a989b2c1428347f4208e. 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/2b1f0a4f-2038-4734-a4d4-dff1d8008afa.json and https://artists.proofprofile.net/proofs/artist/2b1f0a4f-2038-4734-a4d4-dff1d8008afa.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 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 0x7ff25882cb1d00b357d20cf4b3f68b1664092a38616988bb5a7a82e621cf409c. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T09:47:57Z), 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/USLD91739637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x315c2e98b07ccef77b9dd3718cbf42aef8b2e0b9dd37b0d1d59d461b1bab5fca. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USLD91739635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6fa10a9207af2da7c90724cc64b6773eaad4febf76f7fe7e2836da44b036758. Chain 2 (Bitcoin): anchored in block 959065 (2026-07-21T22:00:50Z), 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/USLD91739626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0c575eeddc36e52f9a166e09cddf08fa83d5e0dc30015ececc5e373850cd1e6. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USLD91739629.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f9f753f4e077b1474d3e70c2b704d337efcbdfa7fe9ae2525a7f746276ffd88. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/USLD91739633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7690bf433314f8514966c7271d1737d74c391687df880db0420da1d3dddc0df. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/USLD91739634.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9eefbfdb633806c7db6dbf1486bbe36691cd72b9bfbb06f7f34c1014c172361f. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/USLD91739628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbf9c4f00fe5cf6345ca27d42b2fe17f7cb5c454120ff2f99dcdb93d6bb3def2. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/USLD91739615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x406866b1ca3f01df21ee076ac18de2c99a4e8b260f58ec2ce10834e7432f1184. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/USLD91739636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f3b846edcc6a681e47b21cf63b4a8bb41a67865a462adaf4adeffe8feedf40. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T15:36:35Z), 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/USLD91739620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59d7155b41d1c899c4eb0eef50816d96defd73365623b98332825ba028acdfe9. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USLD91739624.
Sundown (feat. Wyatt Roberts & Yung Honi)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x06c1ef3d17c5f60c99a5964547fccc78c6fa84aec6e6716cf526a06d60739a51. 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/USLD91739625.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed46785f6238878696ccb7a6670c22795593b65fa0ea4c24e58ee41fe2abd747. 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/USUYG1508488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3287ba6c805c533e3efb268428cf9a85bb3a40f80b7aa4b8e429235c27cfc8e5. Chain 2 (Bitcoin): anchored in block 958242 (2026-07-16T05:02:52Z), 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/USUYG1524117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36fa3a101ee8d7ce29f0426c6d1e9b279f9ab7fda0119c657be9ae5f822ae163. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USUYG1545072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5849ee39e388c7d92081ec2fc9b3091957c0b0dab4b2c8a6d5432adf69012a70. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/USUYG1545927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9c6017a8a59d9e0f081d6af606986dff1a37cbd700ed9c858640fbffb0787e0. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/USUYG1545928.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5bfc400fdf48cf3e79b9c4834b644b3bab8ba2e12a99402d03a44de041129520. Chain 2 (Bitcoin): anchored in block 958846 (2026-07-20T08:14:15Z), 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/USUYG1545929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3e908eb6a746fbe9a9d3fb69d82f6f2bfffdc03037932349ab3e2f038a7e93. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), 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/USUYG1545930.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3966e43b8fdc027885befc95e2c759c3c3689021f3c160eb2984c53d6371614d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1545932.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56d2d49a043ee8bba83cc9b2a5003b2e3fe93e7720dd8dd73ed79adc3b8920ac. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USUYG1545935.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7762654cb151476c3e353f72d6e9930c845f69da69925834f53ae2b740ab4cc4. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUYG1545937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe48b8024916238d03dcbcadc74d2e1f17ec90250a9a29e6ffb099449faebd082. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/USUYG1545941.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed46785f6238878696ccb7a6670c22795593b65fa0ea4c24e58ee41fe2abd747. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USUYG1508488.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x205dcaf6547210e431e5994d532352a3de2613dc617db2e7c811ba88b4d87530. 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/USUYG1502123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6e18d0dd014b74b2e1a6d1235365c2ec801cd6f1f39475ecff74cbd2ffd879b5. 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/QM24S2400203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3072e1ea43314ffe850b367c339b6ad4250ad99c0db5c60f3e0e48493c70774. 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/QZTBE2401289.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6840b37340be453254ce56cf78cda1dc730679866248c4ede273702d30005255. 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/QZHN72335108.