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 0xe59996bab2722aba9b74c0e70a42acca0784c83194f3d6f3cbcc45b476646bb8. 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/4a702e94-6428-4840-9c7b-d731f42e63c0.json and https://artists.proofprofile.net/proofs/artist/4a702e94-6428-4840-9c7b-d731f42e63c0.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 0x511b5aabadc8c892097de3b94d519a1de6f3f524dd715ac1e2a1f700da0b5c6c. 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/DGA082319503.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9565344e1c00fdb226791cb065d8d1cc50d88be23a46e26f4614dab4ee91b6c. 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/DGA082319504.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42802c73e6cbe82a7554022489d43dd104f68853fb6393d7e5641e031e4e9270. 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/DGA082319505.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f01962f2b431a06078ca9f87ccaa1effae9a0059f90a7f96605583982f96234. 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/DGA082319506.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43f690b3e02acb97fe6e93c560dd73c7e4a556ccf6aafdd01c784d0c9ae230f7. 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/DGA082319507.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d03344f4beb87f63f95aa8f01d24bfaabd3af2ae2d6e3e2dd6a4bd80a927b40. 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/DGA082319508.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70e3097b72248d1cb25c183326d28798560e35d60cd8cf456c06ffaabeaebb89. 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/DGA082319509.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa18074c35d81c667e20943fd9c17d0c042d665c796bd1a1ada495fbb9de0a49a. 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/DGA082319510.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6246a7e940d6f55832dcbc05be72eafa02af9306661b7430511b8a1c7f0e1a0. 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/FR10S1771811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x288a124854afd721201385ec0db0675ac8d89050dc2288d4cd3389b66bcd806f. 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/FR10S1771812.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf18f0686e3565a4f8729a3ab109cd5396ca6ec3b16ab7bb06788f27c0c7e34d. 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/FR10S1771815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd581715a303eaf754d2c5f46dea7834fabc25792154463587f86d639dbda3fb2. 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/FR10S1771816.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd29855289b2bb9ffdfdbf11ceb67ea1b23d897280807d1905c0b548e2e504759. 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/FR10S1771819.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4572eb8a20752d9245bcceb7f00729c0123a14a9b4056ec14e51ccda4ce2dcf9. 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/FR96X1748613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00daae67d0856d1e6c462916383e7c61050c2c5027401dca4ff0b5d7aa91b540. Chain 2 (Bitcoin): anchored in block 956861 (2026-07-06T01:57:57Z), 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/FR96X1748620.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ae7bd89949f245f0444ffeb19fddbaa70ce0d9360c02546071eb825d5a5717c. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/FRX872119925.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4dc54966cddfe1b01e812df9cff48778e8e7d48f449f9f8bbd3d21ef3499cd. 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/FRX201954998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a94e8db0e2e9052e13cd4d6550d22272c0b8d4af6cdef07f225bc88f1d8df24. 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/FR59R1760788.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3ac7ab663195233a6edf783b94cedc2ad4c048e89ab02a9323c5dec995056e7. 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/FR96X1636286.