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 0xd0a41ce88316977e552d108c41fbfd8817dbb3bc7fe2608ba0265dd9852c2f4a. 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/2b59a7e7-fcf0-492e-804a-f66b9e80a8b0.json and https://artists.proofprofile.net/proofs/artist/2b59a7e7-fcf0-492e-804a-f66b9e80a8b0.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 0xade880ab6b27f0d6f0e660658bdc4bc562015db38506dd4fcd8f32236c5bc083. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/TCAFG2067350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadb40e7c0c70a014d6715d58fe08a39b5503316a3bc828e1478025cb44179f24. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/TCAFM2113805.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeac5662da3dd4a2877df7f34d0ca9c30277c87ed007b1b0e238b319b7c2aef68. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/FR9W12205451.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a705531c33de5a58c678e16995c073e853ef60ff1f127e824c5c779a8352802. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/FR9W12224645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dc070428879a2309949cc03f9825babc282aa4cc07ed26354ae06a632e32e. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/FR9W12224171.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca69ece720c946bf4b7a7d062fb66438a84abfc92eadf978472826533168c965. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12224711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbf16d3686bb730cafc473c181f58a036d19787fa27b99da06928f5ca30910aa. Chain 2 (Bitcoin): anchored in block 957959 (2026-07-14T05:54:20Z), 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/FR9W12224170.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a1236dfdc5caacfdd5bdbd9025b956dd8abeab1626b51d47de3bc9ccfc3f8e. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/FR9W12201463.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33d471f1912dd50d1ac3a20f6746e8723ad6fd2943dc671389cde5ad6c411e05. Chain 2 (Bitcoin): anchored in block 957884 (2026-07-13T16:55:06Z), 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/TCAHB2327900.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd46158cc6c37e29dce2723a7af3e06ed1d860e89d967bf119e49cc5d220fcfa9. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/TCAHI2337408.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9352926dd9aa02fde16180de8647342d215e4e7e451fb69a8f609ffe8b9edaaf. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/TCAHI2337437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9d2a47fbb8e7f5982162fdb7437ac6bde78d13d0180c686d37247867476b710. Chain 2 (Bitcoin): anchored in block 958432 (2026-07-17T15:43:17Z), 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/TCAHL2306853.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x85a7c30ec27504df5f1afb322479abebf1e7108c72991782273df88af3f6425e. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHL2306882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x486208ef34c4712e10a62c03f61c0390c9fb4cd0a7a458975bb325738529c0b6. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/TCAHP2346001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e1f1f34289f3d5ecf5e7e2d0f16355e7bd065f43470c1e47c8bb9230a7110c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/TCAHR2326301.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01b103c986be55936dee1bd1a8b0dd2ce8644bae36b546fa894bee219d1bfb27. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCAHR2326324.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5acd23f7be33bd0594b3e56781a00a844a3dffcda5a60e7f9dab2ea166f3e76c. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/TCAHR2326329.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bff54154bf20e6a8f0567be7c49387d54349e45337069e075613fecacfc3d45. 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/TCAIT2444229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c464f789c6d0eb770e9ea4c6771f8d99856b35f7801a800826acf38a8b41003. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/TCAIU2444282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8f67c27f978292fc2c3cc5d7935a67e19bc5a6da65025f4bfd32939180ffbce. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCAIT2444334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08dfe53a424ae64312ed03cb7fc126e2b380b6e939a1107475c20c198db983b5. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/TCAIU2444374.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72af7a2363610847cc07a2f224c82479de40e78399f5918fd836634acf9b1727. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/TCAIU2444430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47ad57d97b563d2c259d176066f069e595d4ce4d9570650160991b045cc8a51. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCAIT2444499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16b45a97997f2c4a9da799c7701555782e513aa465af6950103a428c396308b1. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/TCAKA2501531.