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 0x0603b432b3a68921e4ccadb597cb223ab0e0698e3e438dabd4e5a891ed81d445. Chain 2 (Bitcoin): anchored in block 953662 (2026-06-14T17:28:39Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/55d16e5e-391b-4ca3-be40-d541aa6fc62f.json and https://artists.proofprofile.net/proofs/artist/55d16e5e-391b-4ca3-be40-d541aa6fc62f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
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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 0xceddb1c0e303e271ee1c789e3a3f36cf39ed0e2c6ff232d6cf35093e6ce02009. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/GBWUL2244070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7197387397eca88587e1186dfc63174222f2b04300baa46fd8246add1be3c9cf. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBWUL2244071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ea5e8cb3634b761034a19f0f3d261771ef9c73ee79f2706f829e7c383bfcc1d. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/GBWUL2244072.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a0deddf9be1acf9d29daef0d129ba79a41929cce4b558c1f8dbcd8a30c4433f. 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/GBWUL2244073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbd5e2e4a5178a73f96674b43e166f3cb3e19922239688b0ff9b3b6f255ef538. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/GBWUL2244075.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e1f4a5cd89ef7f8149c0d710ae5a00e9f409224a635fe62a1202e4d41aa732e. 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/GBWUL2244076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3429f59bada2942a31f545dd62f4a56ab261f0824296b0ccf11293934234a95. 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/GBWUL2244077.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x831abcdb327d17dbb644fe17e619f09b5c153965c1af70b5927c9924d7c99061. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/GBWUL2244078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07c9d4e0388bb8383f74cc91109fcde79b1d08e6357e9a8a4e8053ac03c07e83. 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/GBWUL2244079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1936fee793a3b2c68f0312101328b909b657d89be4c1186e1e9d8d3f50edd3c3. Chain 2 (Bitcoin): anchored in block 960481 (2026-07-31T23:51:35Z), 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/GBWUL2244080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab34ef39244e17d07350d4c2ebde541f90de33b15dd3102f5afd9f2bf35ae5f. 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/GBWUL2244081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2077fd5a0e556201d3bde55243c2a9f8a6dcaf8026e1987399ee10439343306a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/GBWUL2244082.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd041d687f7bb5396ccbc9b162fb959f678243306f02ab046248c963773c2910. 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/GBWUL2244085.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429835820fddd47bd0e7e658eac6239a483a83ad28668d33ee203da5279a8757. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/GBWUL2244089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xab9291ff84b11828d14425a4ac262f685a2761d88eb062e5f251937c00ad75c1. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/GBWUL2244090.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d63d1fce541c48814a5e802065c35b3cffd9fc485ce64d9514dabbf33f4e4ec. Chain 2 (Bitcoin): anchored in block 958130 (2026-07-15T08:37:45Z), 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/QZWDD2210620.
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