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 0xbfe0b7c2f41486dcd51a1df05f96581eb8b80a2ffe9670c6418bdc733aed33bc. 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/691f1fe1-82e5-41c2-b146-470d0c669e5e.json and https://artists.proofprofile.net/proofs/artist/691f1fe1-82e5-41c2-b146-470d0c669e5e.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 0x21898e4ceb72b57590747f0b6f001b4b42bd87fa621317fec082afc35bbec147. 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/USA2P2037505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39cfb302bdab5dc0dc6c89cb10ca3b61b2a11442c33a071b79c20b704931f6a3. 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/USA2P2037503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda99fd02b4b91b0d9169a699f873db9cd0c1f91216027f6812bc84e60eac0fd5. 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/USA2P2037502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99dbb91c547fb8e3161c61aebfa4a202df89a8f7eb2706e778bc4f064152dc9a. 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/USA2P2135532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d92e2a2ddf893b03b9fa273fe0136804bdb34a8c555567b0a072512a0044334. 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/GBKQU2296181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a815ddc733522ee11b0562e1b2e4f0cc72ccdc0aa44e1b7ffcd14248aaf5d14. 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/QZHN32093885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3c2174e28d5bdb968ef542dca37c9589b5b44cedc628a69c3a8ffff5765526. 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/QZHN32093890.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2943dde7f866c4c1dc0564d5b262e39098e7c357851ee32c6f89e1f757465e. 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/USA2P2363559.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7063551b025b1645f9ee4c21a52fff03cd0264981129695acc4ae50ae5a838de. 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/USA2P2363560.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89e905feda34c5d3da0da23a92f61b62776e57d1b0c1885a1367f32e745905ca. 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/QZHN82063610.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fb5eebefd2037cad3647e88e89865d402ad4010c278e2629c43e2685dda3cb1. 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/QM24S2406654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6c2b112672b90351f94e9003dd83446d185cb942358fd406278f56a1c976ce6. 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/CAUG12400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac255acb14cdc745c86ec14dee73c4101f92d4d3bee9e3e47b9082d18adf33c. 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/CA5KR2469793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1305b7430ecb1bcfac922f2af817ff64476790a0bbeb1219977c8ce5fa716b9. 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/CA5KR2469794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabd8cc1a6fac8e9f63adfc0a643c87bf290bc75c2c7d5e2280d1809b743b7649. 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/CAUM82300140.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ab39e6ce5a0050a66f94a44899d56832eda4062f4a3ee02fe60aca7fe8efd4a. 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/USA2P2241827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2c60dfa466299b2568d38eadcc38f17557e1c0769662f77414c53a138e3dd87. 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/QM24S2106906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8dea1dab5bc8d3e1a4dceb7534eb6ab6520713f75de457658a960c0325a3afbc. 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/USA2P2135533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf84057171b3cc6704627db97e9459529d9d5e64317e621edecfbf0a1d97cae04. 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/USA2P2128538.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7b13b56aa61e5d13bafd887b870ba14abb22edb1f2d8fbf3cbf52569dcec1f. 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/GBKQU2138179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b36063e353646624f913839c1c1ff1f49cb74448cf23af2837cc25ecfd0f1c0. 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/GBKQU2317051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358d577f6d3cd57bf7250a9b967a3b75710e4e2243dfceb1b63c53018c90752d. 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/GBKQU2317052.