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 0x9848c20d9344d948209e53b6885fad99bbf3b5325f78b1c273b28396762b1ae2. 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/a4ab54ac-b838-419f-9a67-217fed3dc73b.json and https://artists.proofprofile.net/proofs/artist/a4ab54ac-b838-419f-9a67-217fed3dc73b.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 0x404034544f2643f9d910bfced16f04b4725758c8d48c847af6e817f46c84f015. 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/INSK92400046.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46f39d3d6f145f770087db7bbfc37da71b6c6ebe87253013edd8c0a16b16905e. 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/INSK92400050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x191fb4cc155c46a0317e07c2381ae8542b7368f421d0fa6b691052ab0e639056. 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/INSK92400713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x038b3d72e0dafcc85042a111da9bd294c2ac6b45bc4b46a921b5f70bcc8cac9e. 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/INSK92400534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8d67cb9e99ec251a248a9afc4f1515840289fe3590db9a097d0e2917064f628. 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/INSK92400472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x384d862deafda89a9e1eba07bac1f2f3bb35d908e84ea83d282596d2c1d0170c. 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/INSK92400431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde26d2c0c4a4a5985b5014eeac23aa1c28980e419352e60fa3b6a41960b3ac64. 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/INSK92400057.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d70071de4fee032393c19f895d001d3cab01bae287136ec7382c04932c5b0d. 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/INSK92300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b0834ec0892f91f0ef10fc4ee54c3971900d807e2eb9e2c5905e3080b39e5bb. 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/INSK92400058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d315f4e659f2006fdbb5399044b17814c278d474cf06c0912a9ac0f889d94f. 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/INSK92300312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e411bfb2c0987b291fd9117668ab09014299a15f50db780788a19d6b0f35a68. 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/INSK92400059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acbf0523baec450fe1c3148a9713eb4690720c3b131d2a9902142a258f409f5. 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/INSK92400060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd923e8aac77de24046b975b5a981e8ce08fad8cdea204e0adb3be00973a31cca. 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/INSK92400061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2697f6061bd3711f2c2b55a7a83436776c7b7288c9f652f5471dd8e916ef55. 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/INSK92400062.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3feefafd343c2e9309703cf51df26148b194e3c193f54b6b6369ab45773ff0d4. 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/INSK92300255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb56ae26ea3b3093bc70772f736b91ae71b00ae15f6cffbcc7316172797f46b4f. 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/INSK92400063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83552daf839e2cb561310f4cdc91ddce1bf1322bb1f86f7193644cf1045be4ba. 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/INSK92400064.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e6caaf65dac17c0c3c354288ffcf9138261ff2df17747cf3ec17eab3a37a64e. 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/INSK92300299.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f6bb1687fbc1dff48e35ac0e594980745e8157072bcb0bd1b0fdfdb9f64ac7. 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/INSK92400065.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x294296edb6cd640b747708cfcc1af51f7014b53bd7d21b08a4e6b9d4577cd99c. 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/INSK92400066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ee712ff9a90182818ba6d48a3a6a36f215099b6744c6dc65f9c67cb3cba5be9. 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/INSK92400067.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x40a114e0f92f8ed39c8016f0b45d05e4a2634e8c8f9f0d581583e9b4f18ba45a. 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/INSK92400080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca643fab2370e1232540e66b273b49fd42eeee435188eca8f2f5baf7ef44aa19. 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/QMDA62446615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2fa202810c550123648ba36f3947c70333dc98be18c16419b1599f3d4a6e6371. 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/INSK92400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe3a64ad8103359393de7417267ebf0ba3dca5bbc671adb32474b249b435c318. 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/INSK92400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63d70071de4fee032393c19f895d001d3cab01bae287136ec7382c04932c5b0d. 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/INSK92300324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4efbcc4f36714b43d04b3760aa1736ac9049212d3a2f2792aafdef8f86c54c93. 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/INSK92500003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x762585c0ec877b95329933cb25ca93ffedf407028e7fe95fc7ed86f99aa032ed. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/QMFME2479078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe9338ff9c328335690b768633acac7d930d086189b0c56da6ccb0ff010331fd9. 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/DGA0Q2432322.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd273f3dbe39e6dc75c74198552d411a5fcc945597a609ecda7e74cb2f683ffc4. 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/QM4TX2566588.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed3c293761c88b1d1201b4847f6378e60abd867992a9a4efdb5645cea3be24ae. 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/INSK92500048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78d54462acddb30b16aabd8b55bcdd877e859f99c774bc8dd2fc7f5025f70dd6. 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/INSK92401375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d847215c69fa8057a6dfd56bc6abb5bef236c918f9d3cb28bb8e94a30ccef60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/INF252300060.