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 0x88ee7ffbeee703b207922e6eaac56f320f9c4abadf8ac0dc9015e94542b7f131. 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/19dc0eac-b8c3-4992-81b7-31b412e38a53.json and https://artists.proofprofile.net/proofs/artist/19dc0eac-b8c3-4992-81b7-31b412e38a53.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 0xb67993c6cecf37fb711591c256cde78a7606666aee19fe6e4d0d2211eb9259b7. 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/QZHN52539131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x344f58f98a4212e51838c8042375de3a59c38c45f9877e9e22b8b47671ab44da. 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/QZDA62597844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983c937975d391eb55095aed4f6da0b02344837e93c4eec1600e89db4dc49f7e. 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/QZDA62589619.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff428660d876f68d5badad80885ee3632a887b5bc22a65dafdd5412237856992. 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/QZK6M2509234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa82190715d12f471b5a1a4690f47ae9ce143c51d234b5315532ef9615c0e43e. 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/QZDA62599166.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51986ad2d3580e5b081d17796d29b3b1c6d9b1bd17bbdf31f24333f39dd421f7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZK6M2520427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f42a3ac9f6805e1d2a2a4edebec095b179adb010de7fae270985498dcaf17a5. 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/QZK6M2509236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4109187fc6e990b791a1ded1da818b9eeaf46a1a446568f9f1d16c8206d70f11. Chain 2 (Bitcoin): anchored in block 958520 (2026-07-18T08:19:09Z), 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/QZK6M2509237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6648239615ee6df9bf4aaf523ed2be2c20b674673cc3d33adc5b0465eb9459c3. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QZK6M2510946.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4e45c91a46548c8537a03cb75ee5d76b527ef25090a931edb40a0ace35b6e15. 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/QZK6M2509238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf16c81f60fa532b9ecde31daf50a0bb3495deffa4c5aefe47157677df3762723. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZK6M2507637.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe73b5e8441c9f4a31828ca09b718a80adc1ed822b579889cb48e4855f60b5d11. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), 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/QZTAT2525669.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd22e52af5f4444fd95bad208fe19918d5c346d05877870e5a75b513be5ded02. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAZ2500846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x249dbed56ac7891ec07ed4dadc384bba8d78d40f25cad4ff19f11e66c5fed15a. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAY2599246.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10e390e080fb68e09981f0996bb46cc74f0721c8b746be23bf9cda015bc85917. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTAZ2500839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4389a0d4bb394b046f79e984587961bb3124ad39483371e7ee3e63441bc75884. 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/QZTAZ2500844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b90d6e78445205a591ac6fa3aea8babaf59916be82a5bf37baa654b51bdf09f. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAZ2500841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x678fdccfc1c131cbcce50236fc23f4628f852c07cdf635a45df262e19185c4fb. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/QZTAZ2500843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99e802c1abceec51837b7f7e53b7ae15c9c6584f3832513d90d0d36ae124ac8e. Chain 2 (Bitcoin): anchored in block 957772 (2026-07-12T23:31:17Z), 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/QZTAZ2500848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266f434b04f17baeb268ce65edd663c1d5a3f04c419b959779e4352ec6ab8923. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAY2599414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x299cd85ccd325d23a95b608343a38dc39b1cb7801aea42f8e29fd0f8c2e44970. Chain 2 (Bitcoin): anchored in block 957776 (2026-07-13T00:05:10Z), 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/QZTAY2599385.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55f960434ab7ea78b32b85eea1f95ef8daa518cd99481ae994ce23dde57f205a. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAZ2507567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c970a82cf35422367e6c515086ae31f713d394c06d4c8b270dbb6beb4102c47. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), 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/QZTAZ2507267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c24acccf2cbefef2e83984878b3e063f81105ee76c7b7f5a6f616f48f8e065c. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/QZTAZ2505959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75e532f631100a2986aab70a41f78948de405fc3d32ee128530c19ba52d47f7b. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAZ2529995.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40733610eb8e74230b251963244023ff84e513a4d8892782cd6ca1ae6469b13d. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAZ2507328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3be25a175b50e4e7b15d9fa43d8917e40609d44f86dd35214ea88740fb5be27. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/QZTAZ2509109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ab1afb348c2fba722bbbbbce27722302ec3a40117189dd3855569189b7ca362. 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/QZTAZ2507317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82d584487b560cf073f65a633a9bda34128db20f9412039e5ea29b2bfb7ceae6. 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/QZTAZ2509105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88ec2769f4885784e3aacb8bd357b6d49bb912928a3cbf26954ae3f36ee0d907. Chain 2 (Bitcoin): anchored in block 957778 (2026-07-13T00:08:48Z), 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/QZTAZ2507282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b918af258e9cf536962957d3f309e9bca5d16cf6aac0b185084c96680b4d9be. Chain 2 (Bitcoin): anchored in block 957782 (2026-07-13T00:52:48Z), 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/QZTAZ2500868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fdd23e493eae41159778004a2a78bece49ed8c58ba13ce745d60ee085a3b031. Chain 2 (Bitcoin): anchored in block 957779 (2026-07-13T00:19:08Z), 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/QZTAZ2507229.