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 0x181a3cef0fbec90a3aa13c7826f9b7210e5cbd48c85b58abb338a390ac1f2261. 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/22825aa0-2632-4f78-b0e2-df594b999372.json and https://artists.proofprofile.net/proofs/artist/22825aa0-2632-4f78-b0e2-df594b999372.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 0x3c49747f3fe61ee3f4670b7fba33673db2ab76dfd5e368bb1b2eb5bf64853e43. 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/QZHN42294534.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe37fe109867e4c1b2d58159ec14686419c5ab3613324bade48a44cb594ddec3a. 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/QM22L2401879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefbc1e163b625eb09c484d60e0806a5e0b869aabe1ac30196c77fcd83a9471a7. 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/BK4DA2301134.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7e58f66df81cc91004584f7ab023b37d2629058588249ea3eece50aee97ba8d. 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/QZWFF2311271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ce1f366502f10a106b8d1b1770dae12267dd9177a82d3616a9e4e7e2073df44. 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/ES94B2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42f3bcf7f4f54e35ae999abc00050ff847ba929e6712bfa9283f4686e404e243. 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/ES94B2300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb10f8a3e518c10b705f8d336adf3af2d0459a109002b5c5480ef75df4af20138. 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/ES94B2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6690f21ba316b96c9044823fc83d4635325f69ffdcd83f442c0acb687aea7b4e. 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/QM7282416375.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af3f152f60a0681a7bd88a712f012cf5a633b5f51d5c912039b20666e397f32. 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/BK4DA2210220.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf49e71e55ebcf91b1b480e7207905f5f069ffa8a7f573ff4f574581575891222. 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/BK4DA2214553.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98fe6dbb966d62572cca0b749b1f74334c358c9749f0b58314b6e54fc88523e6. 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/BK4DA2214554.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x451121f6115b695cf0cc022ef39bf61414973347d441ab30cb900b261f31015e. 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/BK4DA2214558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20196fe5ac12760e5656217d871aa4a1ad132c1560aac322593a010b434b4a37. 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/BK4DA2202839.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa26287d01d6bdf548328fc989d1d3407aed6950c89b29035618e1157e70fe2d8. 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/BK4DA2424496.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b732ca1aa8d58eabb0fd23a5416c7f7dec170ffda1745e7d99aebd4bd060b18. 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/BK4DA2308173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64ea81dce04d5f06e8dac890bda2934e4bb1f0261be98eb04429570a37d0ae1. 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/BK4DA2308169.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5618c397ca061012cca533438fc37fdf1ed05701d54feb235a31ace2d685a524. 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/BK4DA2308175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a491f03ffec341f8b15a18b20ec70d7b542d7d8ef4dc41735296e013ecac43. 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/BK4DA2214500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8af3f152f60a0681a7bd88a712f012cf5a633b5f51d5c912039b20666e397f32. 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/BK4DA2210220.