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 0xe40522b5246caaaf60a4020d53943c137d187ddb6c2ea485e0672d71f088d4bd. Chain 2 (Bitcoin): anchored in block 953819 (2026-06-15T18:31:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/fe93d107-60fe-49bd-8bd8-e2f3987889fe.json and https://artists.proofprofile.net/proofs/artist/fe93d107-60fe-49bd-8bd8-e2f3987889fe.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 0x6ed32f3659a8cea3778fcd4027aac025cba742b5b67c19a83876a801558d1e14. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/CACWV2218931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x400185e100f9b0741c1f3c72e8869051e53aff296a9ae3edcea8b60a3c54eab0. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/CACWV2218979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ad9b6165ef0c8a5241ced50d2a94abff9482d5e9511b437b009e23115f93f17. Chain 2 (Bitcoin): anchored in block 957770 (2026-07-12T23:17:00Z), 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/CACWV2218992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43964b7e991e2f1e9a644a284bf98ccdf91fdb8ea629cb0ae1c77c541c74b5fa. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/CACWV2218998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14463864f2a30a17b436d9d88f5c8751a3c0dbc9b183a5ad67ade7c075ccd380. Chain 2 (Bitcoin): anchored in block 958185 (2026-07-15T18:19:04Z), 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/CAHQJ2400762.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2415df4e346f08cc5c7118d71054284e6880cb2dedef6a3deb8042373cee8d5. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/CAHQJ2400763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38a0d4d493d7e34aaeaca150e15082a14c1c08d6457ae413257dc0fdf54080e5. 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/CAHQJ2400764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f7a5cf1b035d4bcfc13b8e3e2403fa9f92eb151b84a608842adc401d59065ab. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/CAHQJ2400765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c35c580f0a366a151556c19affd9bfd00d6a1eb96f28392125c8645403245a. Chain 2 (Bitcoin): anchored in block 958465 (2026-07-18T00:04:42Z), 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/CAHQJ2400767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b3fb151496764f46474f497dfee443c06807c9dc01898eb817937ae47aca8ac. Chain 2 (Bitcoin): anchored in block 958587 (2026-07-18T17:06:26Z), 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/CAHQJ2400768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xebc3f43420b53845c2f43f8daf73314af8d3d946822b4de7dde1faec47281991. 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/CAHQJ2400770.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c88b3c9bddad4233de1e731d85f494577f6190accd1fe85460abd21c6442fa0. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/CAHQJ2400773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dc8a9bcb324b2e29c1aa0b9d856531d3ad6807cca3e40c43b249b12324cc122. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), 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/CAHQJ2400779.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ce5ad88c35bd3915987409f749a2142cbcf228fd9d44a985a50fa16e48584c2. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/CAHQJ2400782.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x64171e549b311841576d53f7df254827113a3a827d339035cf8c05b50809fceb. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHQJ2400783.
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Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb81f2fcd645dedff7d91eba8045089567b5a2e163386c61534ef20013e83c4cd. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/CAHQJ2400787.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x194fdbfae28f07e4571c6b522b174ab396c853ee879441349ba820d5b7424f4d. Chain 2 (Bitcoin): anchored in block 958788 (2026-07-19T22:07:06Z), 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/CAHQJ2400791.