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 0x7eeefdda922235c303453951fa02b8981154a435333f725dccd76c1e9e91074c. 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/1ab205e5-e3d8-45bb-a459-052075dd1fe1.json and https://artists.proofprofile.net/proofs/artist/1ab205e5-e3d8-45bb-a459-052075dd1fe1.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 0x15c01caad8e33d9b9c9488027e20678e48d4fc9ea294b71413d5a49ad0201d17. 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/QM6MZ2425850.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a9f5720add0599b72d553a545da6b4a0d7f794fb06ebb2e009962956a85f928. Chain 2 (Bitcoin): anchored in block 958708 (2026-07-19T09:08:25Z), 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/FRX202204674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x932ee6f7cfa30af3ff18df10ff0a7f1d7c52fb12f3bed067d424046150f289c6. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QM6MZ2425821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229838cefdb96c6743286738d3cd039db53bb303b29fe94fce46c19fcfc1a56f. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZWBE2245334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02dfe3ca794eba867d487f3e237b081ac2dfc3b38be5973176c73cd0f4a0c719. 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/DGA072204862.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8ed70135f1a28aec58105a12a113ad61bc7bff0886ef4454084c75e6bcab7421. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZWBE2349883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19676ca5f694da75cc4294fe257f6ef39271cd7285d633a86df9cccba47fde27. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/QZYHM2368280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ce7c134486d2b5e5df989ed64f2d438686112dd26e0399119c39e28001c3c21. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/FR96X2451579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c1d03208747d18800383a13beec8e9dfa5667d7816354989820d402fb4fe850. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/QZYHM2410660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b3d012124ce4d0cddbbd28ba7452ce04d29c14c9e3255b3761dcf9210924f8a. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/DGA052465794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd06541acb877508d73090a6d722ec08c38d57659f6097654f7f7befce443a463. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZYHM2427105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa69e9720266372ef7f68ec4fa65ffb2152682844deb31268b4f347e7a939de73. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/QZYHM2502163.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9c38c580d5d5cf84628c9f5e904f0d797a3eba1daf71fcdaba39da71b53e6db. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T13:14:05Z), 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/QZYHM2502447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x926fbc6f8c2667541d86b0587266aad43054e37b57da9ae4772bcaace99dbeb0. Chain 2 (Bitcoin): anchored in block 958876 (2026-07-20T12:15:48Z), 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/QMBZ92593307.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aea5923dcbe747df894523cf48fa5ca839ff0d65a3e373edeccfa84288951e7. 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/QMDA72505893.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc9ce422a7208c286b7908be23c5fab4c79e6fc9f959ef97c432e1a2f23b70f85. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/QZYHM2508841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf689de94e0d57453485980a34f15babae534d0f25adc754358927f3924df75b4. 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/QZYHM2357340.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b07b1e3fd30eff984f3ad8ecb1842a6879d55fa3089149c4b6a6ea415ef2243. 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/QZYHM2500281.