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 0xd56f72833cb80d237dcd5b207bc7afbeececb07ac0410cb4408403c26fa37e6b. 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/10e30a33-014d-4578-99c1-7de73fb0abfe.json and https://artists.proofprofile.net/proofs/artist/10e30a33-014d-4578-99c1-7de73fb0abfe.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 0x367578420ed18f78868b2749266e1773cbdcb5f3ef89f18a9725af2c637b19be. 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/NLT2H2300706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedd2e0309923b3a4b402087dfb6277db073e5b2500833c1568b1947e23254ec1. 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/NLT2H2400937.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x266a1fd8efd0bc28d9a64eec306965bea4493dc6b0c07c06c26a79edd6341b31. 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/NLT2H2400765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10aedb25d552bd259c7f8c177522a0a3272845672010bb23b62b9f5a06dcee25. 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/NLT2H2400656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f28fa07732b96ad3fc1eb0e7fdd7c49a4d5325ca181dc627859ec8a355d982b. 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/NL2QC2101439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x717c7fe107c3fec466d36d28e124efafcd6ba5cdddb47f0a4048440f1aeb4857. 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/NLT2H2400438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d581a6a135fe421b1a277dd4973ea79e203bf2a37950659acf03ba33d4bc32a. 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/CAHQJ2480664.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e8b07e8df1ed3d680e6718d412217556be69b9aaeda0f96662dbd1ec57d296. 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/TCAHS2353942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4406eb686468e079b9aba8979cbdeba8d2a5667fe1450c0ad45acb9470f69fea. 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/SE66N2311231.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c16669c67af0980ff0645eba8064fe34663fad6421fe37f02c469142bc8f7f2. 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/QZZEB2309326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1365693f1ef1b66ceaa121b1eb61cfacafbfe4d70aa63d5ecd00190c3a1161a3. 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/NLT2H2301147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x670bf3c9e9d1d5fb776e9bd5efa7432e2ede03a9f6a307bdb5766fd5958ff404. 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/NLT2H2301099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fd00744be4d4f1104f5807e594aa38b77e1a3284648896c4bc845bdd5b6b6a0. 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/SE6A92362744.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0da21306b7bdd677bb89a35eec69a90dad6288e963f5e2e5a57cabd0ea231af1. 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/FR2X42584147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5209adf374faec82eb0de37345464b792af4b5fb9c7f0dcace25eaca359f72c9. 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/QZDA72509830.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x995cd2e889c3c42c7c6b8d48bcd3bc8bf4bacb8f8e695407324fb193f9bc3034. 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/GBLV62416741.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6209b827372cfe2c0f9360125bf20f4a9b90381c063ac479782874c99458d66d. 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/FR10S2527059.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f5c9d34a36b60bef10e41bfc9bc61f41b413f5749f988647886ff0540eedc84. 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/QZZ7P2434654.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe25ea1fa500ada30f47d082983846798d199d36fc026778eee883eb15c1fa8a0. 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/NLT2H2401550.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cdb78e555f0932987ce455848e47cd618b09177f3095f00f664b626e9a7aa39. 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/CH7812422367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2caebc86a1d885ca72a8bab217b5afc09632259b001fa892982b67b3d60aa6d. 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/NLT2H2401445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6da3cf8be4fb35b2ee22f7d66805b9ea4e807709daa695fb8a24d2d28887fdb1. 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/NLT2H2401389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6f8665ebbbb7a0eae9e9e2881c186e01c8aac27dc6cdef7ddccb3188b38a70b. 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/NLT2H2401352.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbb633981269f740787d7c219c7362593f92a7bda630f0558f009ddeea4a384d. 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/NLT2H2401269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4291fb0fc6e3117ff6efcd09aefaed124e75273c388bff8a6ed97aa12bf5ea0. 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/GX5MX2471708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x211926f009e9373ab775d40dbbabb0d369d6f49578cd9d4aea0ae0d82c206917. 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/NLT2H2401087.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bd158017d880afe7fb74e1ddc4bda982109881808e5c55b167d0db3652d28e1. 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/NLT2H2401037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe592a5d20cacf1e622a6ccbdcbaf5f7cc138c64be66d95b9418cc41192ddbddd. 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/CBEFB2500436.