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 0x4ba818beeace157ab4ed4372a4ffec96ecff16dd4a68f7167a0d3cc07aa4e527. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a77e11a7-bcb0-4408-b19a-1cb698d2ace6.json and https://artists.proofprofile.net/proofs/artist/a77e11a7-bcb0-4408-b19a-1cb698d2ace6.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 0x2d40fdcbd27b0476c879a3a1f4ab0f29123412b94a369a6e3d98cd73604d6dbf. 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/JPZ922212578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x131151a3f9915695eb8cff806be13baca6ab177382019340fe03b8df531ff6ee. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPZ922212579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0b11aa93f637826e78666811615248f914bf9c20d25bb63f98ccfac2da8b9e. 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/JPZ922212580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x63a5530513d650dd482b8b32d35e7a5dfd3c62def6a0098efb106bafeaae7803. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPZ922212581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdc420b5b4eccab128a3204650ec6b2291f55af55cfe6b79b853238f1b43bd0b. 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/JPZ922212582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb7a28722e02e73c3fcd47e474bd983707fd21d7b7da99701d88556c0a4f35c26. Chain 2 (Bitcoin): anchored in block 960264 (2026-07-30T14:36:16Z), 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/JPZ922212583.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5910547a94a1c925de2422ae27b9bc2ae787e1562ab08b16826d24cc35b198f1. 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/JPZ922212584.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x574ee7233abe88aadfd4073248a9e245b5564a61541d11da33f28cd28b715ce5. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/JPZ922212585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe34a0bdd869aa432f5c715a64eb26c833176a1393f6198fede307feffa5a0e9d. 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/JPZ922212586.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe76812766cc60b7302192b9d7ee39d6026f6abac675c929b0b8ed744b0e2c0c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/JPZ922009821.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b0a852bbaf646adae752603d062261e889f03a031f94ec0bf50a3d6db3492e2. 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/JPZ922009822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7ac187a938246c2a45e9b7b78e0b456e92acaa4eef5013a81c22eacf0970ab05. 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/JPZ922009823.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60b404986d27726d4a506b20dcfe477b06825bf3018c31540189c96635f0807c. Chain 2 (Bitcoin): anchored in block 960225 (2026-07-30T08:04:30Z), 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/JPZ922009824.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa05de1b3f274ffb1be92bb70ff21f83c993dc7c125b6cc9331bf654a6994f471. 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/JPZ922009825.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaf02865e2d6e81d41f6f5204123b0f07e83f64d5c006a834f9e76ef3d760bd3. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ922009826.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bf8fbafe0ccf1040e3d4f2225f927fac14fab0599eff035dae47a2d05ff8eae. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/JPZ922009827.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5314ae02c403fc4bb1bde41036a877aae7eeb0c83938068915561efc404983. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/JPZ922009828.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974f971e63a0e523c9cc9c2f9c4963a560d60e815ce495e713d08f5886daf3da. Chain 2 (Bitcoin): anchored in block 960230 (2026-07-30T08:32:18Z), 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/JPZ922009829.