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 0xa01e165f93081f598ee769f4db9410a4bcba72e20777e6699700f794111e68f6. 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/e8588091-7f0f-4685-9b66-d35c082a7943.json and https://artists.proofprofile.net/proofs/artist/e8588091-7f0f-4685-9b66-d35c082a7943.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 0xda18b8e8bcb93e27ce0c7362aaabc37caf8b426f91872b7bf4545e5282c55b1c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/BRDMM0400180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc23cf7645c0633229b98a101fb1e9519f1a2cb98e7c7ee1c476f550e484fadf6. 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/BRDMM0400181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa40d19873e9c61fb9adc0010486e269142a897d8c7006afc632f0c8bf0f769a7. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/BRDMM0400182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46fe42883bc760785fb6fe6e620c7fde0d5b464b43d9ac86e63eeb7928115f5f. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/BRDMM0400185.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9acca540c5faedfce51ceb07709f32079e339659d5049cec81135d8b0ab8ece7. 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/BRDMM0400186.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x853e344e8c4a176edb0731b8d63654c1fadc982627b9613b1234941100fd4795. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRDMM0400187.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x688a9ad794abf074715db8b2e63a752f8b2857a0e214c6b0694a0f7a02b24752. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/BRDMM0400188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eab2bdb274182daeb6f3e2cb7bc4445d9e2cd7a6d1809c4c5823dc5e00040e7. 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/BRDMM0400160.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb0a51930dc7d9220fdbedcd3c4e62c6a420595e86260acfdab9bd6a022324428. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/BRDMM0400162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde59669b028f994f63f12d397cb9543222f629e3eba43955fec3b73e50e3f281. 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/BRDMM0400168.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb97944d357d87da5f0f9f6874dc57f57684e1ecf4d8c55d93ec0f28cb7f084. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), 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/BRDMM0400170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x669f2e2dda50ed45fbf550a4e582acf52d3ffe0b0a539a5d02df819e25e4f3e9. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/BRDMM0400171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814c1eaa8f414d087840f33a693f2d92d8227d11dd30e9f25ed522df1469e13d. 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/BRDMM0400353.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e632171260ac04927ef2f9455dc0a6df51235d136c718b26640a613ef76bbff. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/BRDMM0400355.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8b3684b7bcc2f8883bf993f9f2e4ff82f97b776bcc3cb4aa7ccfafcd7bbf0a6. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/BRDMM0400351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7c59de3e57f6213174e5421dcd30f35b16d1ca93e432dd2fe9cac7c42faa391. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/BRDMM0400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x238ad3c8fc2fadb7be444b5c19a43363c0f5f8f15c1a7d912432b004713fc57e. 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/BRDMM0400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9b13e266df9c168a7d68bc9a62ac0fe5849e86f97896deac4efcb7601420e81. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/BRDMM0400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f6c71bc541b7478879938f7be76b96d05385b847c69c483719906204fde790c. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T10:57:35Z), 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/BRDMM0400036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd72e16daf99b9dabb27a747231995e7ae74e0efddb99341fd578614cf01e73b7. Chain 2 (Bitcoin): anchored in block 956440 (2026-07-03T04:03:57Z), 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/BRDMM1700019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc70016d70cf36a798a5e8074bc78926ee777fbe57d11da1b01d6d51251201e4f. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/BRDMM1700020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09f93cbaf144b9c314c7d4b7e66b057d04039772aaa0727555c1b8d3a8e18bad. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRDMM1700021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x362eb5786adba7496814d88380898ab783bfc9b850dda169a123356299cca52e. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BRDMM1700023.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe59f07a8820cd6a5fbb267df99c02ba3730cdf22701e423f8c9b363ddec6751. Chain 2 (Bitcoin): anchored in block 959084 (2026-07-22T00:50:00Z), 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/BRDMM1700024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x804cb00ae3a9ac12b9afe39c19df7e0cf492d79db91004fe39651b4a24dc8ee2. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/BRDMM1700025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec5bdd3c8965795ed74496e368e8d32a3d04c4eb41357a62690cdcf8d1005b6. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/BRDMM1700028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3629b3bc1a86c83c2b20598aef1e9034b30c0d1ced55f0bcbdaf958ee73adcd0. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/BRDMM0800085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcfa8038bd6e98fe9998aee6990204c8558b29cfeb2d11ea1ee3ffe3f8cc6683. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/BRDMM1200003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafe3017a754acc8fd25dfabbc12f5bb1798cfd2238d0e6ce7bcd21ed54e59952. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), 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/BRDMM1200005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb8c72028b3c4bb0f9f33114d186f99af68250924f48efc11f9e3a5cfd51ada. 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/BXGZV1900027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2aced3d54ae6c99677a3ed054f69dbd628d51d1aa03e9ab7d87dcbc9c5e2eedc. 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/BXGZV1900026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8fe29e6167d71764ec64fee91772260d0e99bfc0231a85e215dff44788aece9. Chain 2 (Bitcoin): anchored in block 958263 (2026-07-16T08:19:47Z), 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/BXGZV1900030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86f8c0d695e23e83063bbc1e564d6e07122fe607f6a79c331d7567039a86262c. 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/BXGZV1900032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51af1a8377ae4f32e84515e2e8ad4e655262b54e838fb7a50ebcc28392a1d401. Chain 2 (Bitcoin): anchored in block 959080 (2026-07-22T00:07:05Z), 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/BXGZV1900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75025b247012c5e0ebfd13fedc158b30769c8b938135a23b6f5519160adae42c. Chain 2 (Bitcoin): anchored in block 958720 (2026-07-19T10:53:46Z), 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/BXGZV1900025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2278f06af757f97649741f61057ab80f1756158718bfb8388e2486495cc49c21. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/BXGZV1900028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e55328f30319f6fb114236a05e485b34515a128ac80df951f91a0a38fc201d7. Chain 2 (Bitcoin): anchored in block 958493 (2026-07-18T04:34:53Z), 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/BXGZV1900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d064528e1608d8d001a80cde543ec8b7c560fdde34da946acb9e1e2eda0549e. Chain 2 (Bitcoin): anchored in block 958897 (2026-07-20T14:57:46Z), 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/BXGZV2500009.