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 0xedc6bab2861dc357d4c8ac63ed98327888083c3b27912503232cbcdbb812d5ef. Chain 2 (Bitcoin): anchored in block 953783 (2026-06-15T12:24:43Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d5906a7a-17a2-4b4d-9e9a-f8d3b7f072d3.json and https://artists.proofprofile.net/proofs/artist/d5906a7a-17a2-4b4d-9e9a-f8d3b7f072d3.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 0xf1ac9782396d78e1b5150f8341391264d43c4625790cd2c8c045805ce6d2dea7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2345543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5242155c54e6002b3c82bbc2ca4263b5a13ff61dc32bce6c69f62df8a78b154e. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2345540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e5a04e67231ff0507c76479effeeec14d9ff27e2d6dc947f93ea89e2da1200f. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GBLFP2345542.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcaa26c36dd09b5fa92243d4c3d6b39511e3efe400cc373e88f602d42d170040. Chain 2 (Bitcoin): anchored in block 958510 (2026-07-18T06:38:22Z), 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/GBLFP2345541.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb72b576b6c5e31c97111a1b964ad7797d3e1aef6a0a06c9ca438946db8192cdf. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2345544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfecb1b38472aee9836a9b68184e4222875d2c7f200d2d56d42e5829663b42e7. 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/GBLFP2345545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c93f44b5b9be07ec4882dc3a4d2f27ba4275560fb4cce5de58af976f01af864. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2346908.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7c0b706979f5750724fa6d3f80ab7ac33d2b9577e6e71b37e2c2fa1c02d165. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), 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/GBLFP2346909.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7aa2230a66483f6d59bc25d3caf92865464b95cfffe2fa19e605c1bf8080ee98. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2346910.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e87a86dd94365e2063b89ff810b2164b2fc122168b7754ca5d67a7a02d5b34. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2346906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47629d13a82480b4ed05dcbfae624efbc8a1a93b2a48334991403289ea46ef45. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T10:20:17Z), 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/GBLFP2346905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebde29332ed34b8732133eedfb658a62f3b53430316ae2d9779f853a1e3f5974. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2346907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d4790d442a25f1a3114f560580d6a9502076140dcc3a165a490f4145e355334. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/GBLFP2346904.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xffd61356127daab606945f56cc7b23751d2e3da36efddd7ba4cc6e4c7f175ac2. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/GBLFP2346942.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc19ae3b3f3a437e966b9776bddbf4dbc07b6817c2e0d8acc37987e01d5cdc1c1. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GBLFP2346940.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x17367a6d8d126fa190234edc139d0ea95ae92c124422783a276e58e999d93be0. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/GBLFP2346943.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8200c5a9fcde7705660b7e12959c5769ed994cd964f2645aa7fbf0cde4fe93fb. 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/GBLFP2346939.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12cf053d3f43b7ad2ee7997f00119ce201b6964ecf93b1bd4cabc1d9d972771e. Chain 2 (Bitcoin): anchored in block 958571 (2026-07-18T15:39:25Z), 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/GBLFP2346941.