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 0x4288b3e7bb182e0f02ceba735d357a813dd4cc288af699dc34bd9d98582e5efa. 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/cb95f828-cd3a-42d7-9e16-6af9a909a877.json and https://artists.proofprofile.net/proofs/artist/cb95f828-cd3a-42d7-9e16-6af9a909a877.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 0x75ff624a36aeca10486be4352465ea2d6158ef8f462081d9f37b9889071d3025. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DGA092415953.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff415207a25686fc70312fc9fbb0997bfc149e1a312da17625bf3c0dfdb5ef90. 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/FR2X42417966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x996ee4cf06297c712d58e3a680bddff4442f9f3fd401b459a7efdefcb8c183e5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX872330814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed633df41c20914548c3dacf1821fd152a7718475fab4bbdf6f9ec3f2c41760a. 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/FRX872274673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x95514727739c76c887611cdb2ee95b1731becf89545167165c451871ee1fd048. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX452250190.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdea41c83a33a3ddfb739ca3cf9785ae91bac4794fce321bde30229cd440bbbff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282261927.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b82e1226998b5de6ace4237b1ac04bf9720a0be1b1b0de85619551380db0199. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282253339.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7dcd98b52c198c1ea3684404962797d1c2226a76bd50cdc15904551f903fff9. 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/FRX282269394.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xded52c0f952b938ff2bcb1dabcaf2ce6d4a1d6ae9643d8f72c6b888fcf7533d5. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282264567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3250fc11efd8e58bcfa6aa4b5fc2e04a077268381996d2faa3a673d98907296. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2008035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf16fef2d0d410b27800e605554048054e68e3962531aecc5c74c7191dbea67. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/USANG2011814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f6c1f4ce7f642ff39d5e67ebdae11a2905462cf9eeb95f37648c4ecd662cbff. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282264566.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefe2d2ded0a6c8d64672a53be3a2baac976dbcc2d8e7e175c2972a071c69d336. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282269399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4f41d0af6f6b28ac367c3aa3304bc89a1c60d040b83f129b332bc496166f992. 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/DGA072306325.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x431a61407a4ff0e2497206135cd92f798e7b0d8cf87fc778dd935b82e5d103b7. 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/FRX282269393.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9223567614ade12892e0256656c0af3bc3e666e46216e7fadbe5143e3105538. 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/FRX282295850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x824fe2089a52e9063a17ef5bc84e3055e14cfee2ffae81135243040717da6d10. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/FRX282295851.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x51faa3df6a7683e313ef6fa48eb05ba677dc9c3811e168fa552a61954b3d0f48. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/FRX282295852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x232d81da53cba8f4149d6aec27e2d2b9dc006e15b2e0ac1d0a3767b92290a485. Chain 2 (Bitcoin): anchored in block 960349 (2026-07-31T05:23:41Z), 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/FRX282295853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c2071aea6951effb2004f7e748b1116b128b7d4e5ba31273b896f9174f3744. 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/FRX282295854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x711659690ab79dff50ddc86bb15c278a77ffc184a4917f1a636f70fa0a49605b. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/FRX282295855.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b2a3b19ec05f0d45e49873990b597dde20fa7590dfa859e9b0a5c6a95c7d44. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/FRX282295856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93fccf502fdd55537ac1664b7bac29355754410bcfbc0273462ed33595d5b015. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/FRX282295857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x34b85ca811c81165cb7d0531a6e808963ca3dcc986bf0e8367fc058b901bb09a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/FRX282295859.