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 0x1287f42e8650f684c2932891d43c4f6a8033b0a50e9833eb9f14e365242377f0. 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/78ed2423-6bc2-4f4e-ae3f-c43cf289ff88.json and https://artists.proofprofile.net/proofs/artist/78ed2423-6bc2-4f4e-ae3f-c43cf289ff88.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 0x68793d0331a0dab6c9698338d1327b5953c68d455b2d5ba39681a90389d48061. 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/AUMEV2478320.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c4b35fb94d0edfc75a06e5f623a5a7b657381f746b37abe9aa3a8e52eacab70. 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/AUMEV2478319.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc072f4d967a861c1a7a156f663a7dbaf0eec544bcdd3867db07750498bd35837. 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/AUMEV2435149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0406aa8ae5f4bf09d778ee6b8114c658f0dc1712a68ef67b33ad17bfa42c8482. 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/AUMEV2435147.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x595469a3ead32844d6b58784f30698756d62477b417c2495a1da96815969d24d. 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/AUMEV2435146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7cf40a409fe2b756347b058296b7522ed3baec3f6de6aa4d78bef0157313e47. 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/AUGBT2343736.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc63d7e5425ef15977bb3aa74740278e9df34e2549dd822c573e1389ad7f729d5. 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/AUGBT2343731.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f50966942cda11402631eadaedd7a720aee8eda7a4ea5bca86544d340cc4478. 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/AUGBT2343728.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x01ab05ca5f60a963b7bae2e8b5dfd1c4d8031a3b77341f64aa4c74d1faca1004. 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/AUMEV2366898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0ffdaa91ca7701901ef08f703eacfee6a3aff9fc30c34e32433d28878c7fa9. 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/AUMEV2366894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x795c20f81ff7933a4b20afbdd7064316162529637e86a39a2467f69f177989f7. 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/AUMEV2366886.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0592719da07315d4d3798842364dc88cf296f58ca6b0a12b4fb89afe0621b2. 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/AUGBT2220155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x334e0f55cc793e9fc8ac1cb574b5ccfd7de52113f2e737aa5984284bc541f93c. 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/AUGBT2220151.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e9a46e053311dab0d5b08e7f087567ba79cccd28ab8499d75dea30035fad481. 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/AUGBT2220148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe91f05ec76f9608efc2a282881d129e44bbe918517a198a611dfb9f83b988db3. 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/QZHN62286075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfaa55aa910971e9a18153ba3682aa7b846eecd3f8092b0ffcf3e2fddc189b69b. 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/QZHN62286074.