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 0xd83528f6f96c1e5630361a001c809c5a27baa75f67afa12b42fa52e9ad8981cb. Chain 2 (Bitcoin): anchored in block 953949 (2026-06-16T13:28:01Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11603cc4-2dcd-4566-9c4a-9e716d3c6214.json and https://artists.proofprofile.net/proofs/artist/11603cc4-2dcd-4566-9c4a-9e716d3c6214.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 0xea08396a63d634242a895ef8ac81b3d8fe3db1e5afcb29fba94c509fabb9bd4a. 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/GBDHC1800803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x536cd4c4a4a59f3c12a0e267c888e349c08d3ef17c1635b92cf1030bf28d4afc. 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/CA1TB1600021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86b4067a66253e4a3f9015adcfe97a7d7dfacb6a98f9ddd9c06bb812e475f050. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/NLR491300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68579ff45816457555d49f79d35df56fe6068a8f54d94cceae650dbef692f9ef. 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/GBDHC1674503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43a6c017c6749656aeadaf2a87b18aed68787d8d3e4f44ed4be7ecdd3272df3e. 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/GBDHC1674505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a25013fa947ff08af3fd0c1e54208ddc528b33a8d017fa06f281c8d917ad896. 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/GBDHC1674506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9da5eb13fc7e91bd0ca7db1552b17ae23bd204ac03dafcc4ac6876b7ad43690b. 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/GBDHC1674507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b4a128497359940c717bfadfd574f73be028c23cb422ca1938df202668b576e. 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/GBDHC1674508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe98c9533471e248b8d1b79ecee370799512d6c87554281d10b9d293b5a66bb. 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/GBDHC1674509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4489ca3fa24112694ab6e61864c8d3eec166cc70bf8f4b9e98c4e40b79b209a3. 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/GBDHC1674511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14921e1cb473dbd3caa44ee7771f4449762ed6f1e510aee666db841fc2ca3ac3. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/GBDHC1674501.
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 0x500bc1ea4079b7395b7955c4cf6f6b75ea053fc9f77aecbc34fc828d441b3b18. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBDHC1674502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x569beece5dc007785da1abfa4076bad113ac2227df716f4169e8855866f98cd8. Chain 2 (Bitcoin): anchored in block 960309 (2026-07-30T20:35:49Z), 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/GBDHC1674504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a1f14ed4f395cf4c1810e2387574c771b9f023bd7cc2d2b72b862ac2e948597. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBDHC1674510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d6d34a3554cff8f2f345270c0f9f19fe4ecc2e319a9617c4246fb562dc6f35f. Chain 2 (Bitcoin): anchored in block 960381 (2026-07-31T09:50:11Z), 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/GBDHC1674512.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bee13fe4207d37def736bc98dc6d4686a222a51d70f109d22c0e075457a6c6a. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:29:48Z), 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/GBDHC1258801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ae9d7e0f2cbe060391129700abb3368a49b9ddfcbbe4e966ce524006e39cb5b. 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/GBDHC1258802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51a402d1e61df918b98931b0dbd72d1d4f01eae70d0177a57aae9dee741dc70e. Chain 2 (Bitcoin): anchored in block 960150 (2026-07-29T21:51:49Z), 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/GBDHC1258803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd67279406b69a3e8d46d49c1f78e2d591db44a0a931954c54da408a369a393b2. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/GBDHC1258804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80eeec8ed98f29853271eb34927c9daf9cf67a8b9355d34405969ece5f728f92. 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/GBDHC1258805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3ba995c42e6ee56b0cfe2b288fb0dde626e43fb71c32fabbb7a3de4198c9292. Chain 2 (Bitcoin): anchored in block 960198 (2026-07-30T02:21:55Z), 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/GBDHC1258806.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x224657a4429b603a982538c47d5f5c244e7edcecd053f562ad09e95b37f5e00f. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/GBDHC1258807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6cb0324f7a7fd44fc75b444e30a84936f98ee1d8d890a0e1a2333f41781fe81. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/GBDHC1258808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cdc718d6959096c6efaa9b11e14f8dbdc886b3d207e00010f37c2ec17c545fb. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), 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/GBKEZ1202470.