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 0x8a821841c59cff1101d5a404b0577b636dce79c3d5338e1fbb5eeea318d81212. 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/3382bc49-ad2f-4740-991a-426ac54a91ec.json and https://artists.proofprofile.net/proofs/artist/3382bc49-ad2f-4740-991a-426ac54a91ec.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 0x96ff39e3879332db23e6d53429f3be1844d052471fdc5424f2ec588a8bf4fd43. 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/GBHLW1802632.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22a6383bd886f95d1c7285c3b2d9b87f673a7a97fb7b19eefb1b766d667785c0. 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/GBHLW1802633.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02fcdaa12a60a7e8e6f34329f51bfb44a535d3b1f9497e5dcf52505d9ed64fdf. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:24:01Z), 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/GBHLW1802635.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2451c2e3e5f4269b3f2d7cb46c6187b5a310b4c023449140a4ef359a1ca84e. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-16T23:56:40Z), 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/GBHLW1802636.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b29e46c68374b7cfc551abfe9737565b0d54867404f04f4f2c31f02dd23bb6f. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/GBHLW1802639.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98c2640e24cd7a3055137073ca011579a9ea886316b83a816dfce552d0fafd75. 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/GBHLW1802642.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92aa8b8f64b51375c362bd497fb01e0d7bf624eab6e23679fa57188ae704b198. 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/GBHLW1600498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3550084f0eae0894932e525d0580438eaa73b75282ecc3ec9f1c8df3dac1ca27. 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/GBHLW1600499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc539b244763fc87970269224a81bfeadc451104610583a912aa4c4210fe7bc53. 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/GBHLW1600500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf014c8681755039b7d1f17aeef68bbb80a8a3eb541537bf0a4733423f9fe9a1. 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/GBHLW1600502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd173f2c0de439dc79537129c5a68ea4db5d9c449889f5bb8cde8c800ec021aa1. 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/GBHLW1600503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0658e1436fd8dda81d857af25a5d30bc25deadb4253daced646cb790073cd418. 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/GBHLW1600504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be5a4ddaa496bbced682d63ac2c9c2d0ca7fd34006b46fec8c5c67b75300d30. 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/GBHLW1600506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3b05e15c487e97206dc89e65fbe2236b2cbd7fc9e800b0e881afd38ff4329a1. 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/GBHLW1902573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7ae5c65055c68c38b277d5b00009baa340a9f79a97111dec4e093d7a3494934. 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/GBHLW1902574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1ebf3106cec2f05c15dcc9a27daffe305c49a3ae83c7a35d75323e98af9a960. 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/USHM91437425.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6868a757d068ec3c46fce7855ffc6e13f85b7e5a2b51b2e4aa1bace57fc54a8f. 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/USHM91437426.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a9e0941b42d182e421c4e8705edda8c50c25db5029e4e10822a0000b1a68b8e. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T20:31:40Z), 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/USHM91437428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5e08dce9d072d43d2fe85f9ab7115222660ad599b19b90331a4bae3d952af0a. 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/FRU701400048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bfd160f4365c8d66db54ce5510c8df0bf1788435d63726abcbff4bc76edee29. 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/FRU701400054.