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 0x4ac973f33115297f0f9e5895ab380e215d100a38d92a9e0e06da53acc58af08e. 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/141cd452-5c84-40d5-9c44-6125e78bc39a.json and https://artists.proofprofile.net/proofs/artist/141cd452-5c84-40d5-9c44-6125e78bc39a.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 0xa8840c61fda1faae5d7d22dc58d893d5cb6a65b44deff62d1945c0a44b4e2d15. 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/TCAIB2492602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9192a74d79a128a1a4a28e84b56ca9767500ce80e4501f5586bb6b2a000dbbff. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAIB2492751.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebd876c30747df5378df5fcceafef29ef0cc3d27ec3baf91dc20423afb4c81e. 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/TCAIB2492768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb3709b9333b4e967994ceebfaf93e7cd68dda30aa020956865512a682599533. 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/TCAIB2492778.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x790f59c5586ca8a9a34349841939a6e1e6dd8c7cb36760f8595c255a784b0bcd. 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/TCAFF2093008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde313fed6f11eb2bb64ccf4b031c74a750ccf792f31bb9428058b4bc21f9f638. 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/TCAFF2093010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcba52ca584c56b2ab4302cf9076f6fd23c22c3393757c8e7ad077518619b2f06. 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/TCAFF2093012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x408e5c07ba766456950da8324fd02637ddba8e63d01df7371f702f659d81e486. 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/TCAFF2093015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c9a680f5edf6e1697ca534cf314da78afcfe0d88828a8613d509a7accae7b9d. 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/TCAFF2093018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3fe5ad312141ebb529b9d4b37a076ed14efb3e25c95c747254be03ebb139e98. 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/TCAFF2093020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6499684169b20768e4f8fc6c8e327483e8e8fc19819076c324bf1b1ff40f0dd8. 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/TCAFF2093024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61bf664f7b0ba16ae4c1f76a4fcec8b5f0987b2700959fc762c616c1bcd7594b. 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/TCAFF2093025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3aeb16bef93b1ebf99e08ac4cee3b09a7ab9d1c8105a621fe396906c92bb5a2. 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/TCAFF2093028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d7b5726f99b8c97bb7035da8754784cb692c5afe11f2d76ffed9e0d2b996c9b. 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/TCAFF2093031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x320a01ab440654c1e5b2971885e8ccd8446177310605e1e962edadacb356ffba. 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/TCAFF2093034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37d6f8ae79ce7b1c8d7796e05f2071d90905ec50067e55a4b5baf71a6fb74a4e. 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/TCAFF2093040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7720bc4a2f420a090813ebe8979752c1b2920bbd0331310c6ac19e6dac029816. 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/TCAFF2093043.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x157f93dc2f4958ad81ca4539a2dc884e91bf1605b0014862f7d33816ee97b0d4. 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/TCAFF2093045.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b9489b24261591381faca48a35de1102bd3255683ef78a6e960c4039065a7e8. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAFF2093049.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4052059cab5cc03a205efc3d1229326292d262c79d9115ac0d4b96799ca30534. 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/TCAEH1987003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd146c1cfd0428e17cecb2471b2be17281eb17a6674c40e022209ef32dec40b8c. 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/TCAEH1987017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30b3ec9ec775c2dac79945c95d57cfba381667e37c82f26f2bfb36b8ad6d1295. 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/TCAEH1987022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x030563596311f5f773010e0883d54a3f597032de92ae38cae092ba7ef3522901. 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/TCAEH1987028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39453acd955da60b03d106920ca1716163443db3370b9d09574afbc326f16347. 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/TCAEH1987036.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555ffb22dac26f42c7e987f1d9d036de986a45036622c2290118f92ca550272. 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/TCAEH1987041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2331b5b8856730bd8c5964c9697803e8e48ace442f04917e42579a426e7d7ac. 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/TCAEH1987042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd4dd1cfb9b96663a6635f727bf0b0bea6edd1e45424dbafea414f4fddd601621. 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/TCAEH1987047.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd2539404f8acc4c963acd5420f3ffca3585c96ffe16ce15033ff231ee108ab3. 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/TCAEH1987050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef3aedd848f6cffff04b5cef6821c7c36a3a77afc40cccb1469a73483e639113. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAEH1987052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f75090fea30c0a4c0cb9e5f124aeee0d4652c3d647a4a1e926a309de77f3d74. 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/TCAEH1987054.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c9520c8c8edf98e5797f05b2ce8702e15ca4329c7462d12defd4f3d14a85b3b. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/TCAEH1987058.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ec05e7be2de27e2ed8b2021d89a627650445a24b985f48a0ed2fff638be6beb. 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/TCAEH1987063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd548fbdefbfd789e45c9d067e9e07166d3b85eae4540a31ab0d2e0553ac30fc3. 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/TCAEH1987065.