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 0x2d2d84051dd82a7c1a259d1b17f8ee454cdc2782958432a053f70d75e260e829. 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/9a0c7d9e-afd2-4d32-a18c-8fbe9d490ce3.json and https://artists.proofprofile.net/proofs/artist/9a0c7d9e-afd2-4d32-a18c-8fbe9d490ce3.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 0x367da841a5d71d9ff45cf32f4e4113db55232a791d611c28282e1e3a6363f48f. 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/AUMEV2148427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x10bb8d6cd953317e4c0c5f84188c821b7cc9b2a7f8cd17ce76d81adc1bd08a1d. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/AUMEV2148428.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf78f337d2f07f31ab8f0ba9783bb81b2d43829425231bc45f4752cc3eff39b60. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/AUMEV2148430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf50033d5be5a055871c1cc986a054650f0c5ab2b27f5cc54bbea197824d9ea61. 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/AUMEV2148431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1ccbb4ceaef7e3317c668d6a542fd8f2efa0848ee06bbd8cb60c4d8debb573f. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/AUMEV2148432.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ac394321ba51a5787ba51c7523f33c340c74b92c3400a049eacac0e04075898. 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/AUMEV2148433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b3f536f40aef3572d431d65316b0ce44da052a73ce7d47e2ea029b8b7db7d53. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/AUMEV2148434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb228503b59dd29755a95d88fe5d095a260e12f05234f470617b2726322a09e88. 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/AUMEV2148438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x002baa185d66a6cf8ae45f2279b09210088283aed733261112641384ad8ead7f. Chain 2 (Bitcoin): anchored in block 958721 (2026-07-19T11:02:33Z), 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/AUMEV2148439.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbc7802e80233a6fbd04a8739f88ef52de9d9f3da07baf928c1741c240253b998. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/AUMEV2148441.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18d079b2a86ded680464524dff07f9ccaaa036f8e034d8daa11c87758af05535. Chain 2 (Bitcoin): anchored in block 956430 (2026-07-03T02:22:42Z), 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/AUMEV2148442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebdd161ef34b8de3323445ea6e85056cdbb6e50c176ac817da9f498d39056010. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/AUMEV2148444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb17403a16f290f28bcb4691698c64dbefaccf0f1afe1ec7a3fc7a9ee2e7b3baf. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/AUMEV2148446.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecfc9ebad9cde1b3d79f694092ba609716766aae19b6266b376f6fe0180a7a40. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/GBMJG2109729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29bfbc5b884587524c0795c135468e120d23865b60e23269313d5895b29b48fa. Chain 2 (Bitcoin): anchored in block 958268 (2026-07-16T08:56:51Z), 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/GBMJG2109748.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d6a3a18cb2bad4dfe43c0f73b23c639a144b88a1522ba74bf7c6c4100ffd995. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/AUMEV2148406.