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 0x98dc8d95261574bf6904b66a6f12dd674bf6f13046ad4343e07de0f7235fedfd. 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/108baa95-181c-4882-b12c-952324a9eba8.json and https://artists.proofprofile.net/proofs/artist/108baa95-181c-4882-b12c-952324a9eba8.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 0xd06ab9e38a57b19a34c8f1d254ab19d6d374a89a2f8c2db6689cf33571e91c63. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/DGA062485117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899698086fd86e3e3c3940023e10ba3691c267adb43955458917a66b52a7c19d. 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/DGA062479138.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17bdbdd4228308643264458346c12161dea81d30fd64fab9a82cea99d11910d8. 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/DGA062479140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x878a6dcb4c16893f9746a043ac83af386d9b621af773bb70925f0800cb48a317. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/DGA052495607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb716eb61528e9bc733e2be8a0f243f9dd7b27afac47edda5786a9cff45c5e11a. 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/HKD012309751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39e7b81342ac2542c118b61d68c210a110d67ade342985ad5e542c1ef996bc43. 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/CNZ852410460.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa77b6d02af0c1bf6fb30c1facfee31f6cb1f0ba6c9546233c722f8e410552a6. 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/CNZ852410461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990a4d4684eaf3bd7d1355351f556be21a8a83dc2077f4fd164b60702693dec3. 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/FRX762490532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4878c57a33a0db9a5ac75452233ff34ac6b39c009e6fbfbaee0dcdd0f6f739. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/FRX872401569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x770c397e129c9d3eebb54f00fc38cdc9a6d4f84641404dbdbb8ce1927fa48f88. 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/FRX872401571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaae9c2ab06d95e8a2e5da294a50249c434ae1370b49f6660903cf6454ec5542e. 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/HKE022233805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b0c4807d7de1a41552793d9f8c0bd9970a2cd2a997e42492841f6fe0840ae1f. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/HKD012497599.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89fd815e3e906aedb6db50a4127a230786178e79af5287d77c966bb735da3280. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/FRX282527428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x341ca657f556e05f2d86c45d964411e77bf74bd974bf762c0b7114a79127a3ab. 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/HKD012490743.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145523537f0cf45de30778207c32ef6111ca72f22c585114f2000783249bcaba. 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/HKD012481525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a96879ea72b3228ce53cbf9fbd187a6383b9a01f65b67bfbf3caccc61658a6b. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/HKD012481521.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5387ef10c9640ad6c9d54c252167e98279eae1fb38748edb74cdf5a314ef03e. 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/HKD012479672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe07a263a2cf1b6c0a521c21c487554d40756187cfad698d232a90f9f2a129ba3. 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/FR96X2517520.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68cd55c6e848f342571d1bcd241e501bc186829bd25caa74d7df60e96501bac8. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/HKD012424814.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9662def04bb9f877e492aea7d7c5358529f40f19920619dfc87e0e7546e21f84. 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/HKE022304509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40d278679e25e28c179b1771fce5a7c2e528064b546587bf3e47bdcb4dcf1059. 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/HKG732493810.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x449a7e1d0e8986994773024d3d47c1b19d3e71eddaf2fa4151a6f825b9b238ca. 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/HKG732493809.