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 0xa2b96bf8f61a282a51365f0440f49ef51e35bb63d4c5a4a3f99c12267f4f6bf9. 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/a7ba84f8-d008-4d8f-bd93-04dd4a5359a3.json and https://artists.proofprofile.net/proofs/artist/a7ba84f8-d008-4d8f-bd93-04dd4a5359a3.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 0xf5dc475b33f36e968b80df81d2eafa9e308e813d278bde6e4c90abf44e5a8ba3. 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/JPPO01220847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fd6658b1610ee83ee9ad2e954bc0580f85da5bd2da66e682c53bfa6f450a11f. 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/JPPO01225272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8ba619b3f87c27411cdf91a4e2ba38adbfbb04543f347f06c363a374ed25db3. 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/JPPO01225273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53ea666a5ad71869e3e3388df19af3841bc8ef64b539126e395b4c5b0a5d5361. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPPO21007000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4db88334e5a7133f299a3625ea2f785bbf3b42be900e8ab94305f52aaca067dd. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO01000720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa114109e21c1c82c5ea11e1c6ba7226d634503a233d182dba52388b4ed8eca5c. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/JPPO00710490.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f1b89b4d37cd66e0b39d4fa2482f69405ee21f82e47379bfbc236aada1393e7. Chain 2 (Bitcoin): anchored in block 960144 (2026-07-29T21:09:47Z), 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/JPPO01225274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228b9c0c2037bfc22f197bfab0353f7ce1096b22d81e681aa92cdb62d6e73bc. Chain 2 (Bitcoin): anchored in block 960209 (2026-07-30T05:15:54Z), 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/JPP401000203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd150f72a21989c7c2cff13efdd2413ac82e6dfdb6848639263caaece15d2fb. 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/JPP401000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec6c68dee0e2d953d31fc54bcd441ed9c562c112bdbc12b20e42d845ea54577c. Chain 2 (Bitcoin): anchored in block 960503 (2026-08-01T03:41:24Z), 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/JPP301000281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x234e4e130eb463e0deca5650e6392604a75b712e1f4fc8b4db9301df69ca2987. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/JPP301000282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5d8f000d4c2311f24256585c9f77eb96f5033b229ee342a3bfab3af3f8d77d. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/JPP301000283.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75eab2207da325da37f464b3e62f0bc57187d99de5335f02cd23b04b967d510c. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/JPP301000285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dd150f72a21989c7c2cff13efdd2413ac82e6dfdb6848639263caaece15d2fb. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/JPP401000081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3eccd264bfb220f6589f8f02055802e09eb6363fa061f469be2015153e85f7f3. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/JPN101000201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475cbc4dd5cc2ab0713b462a64d245340fa340cf26a195eb4a4da9e5b2be6008. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/JPN101000461.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795e863a946c19d36d86a6c0b15840cc2b9328e3addd4d348589ed37d0aaec76. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPN101000583.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6952c46034ec97e230d971374dbcb497452b67f4c8dbd5993381da5379bef598. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/JPBV01022473.