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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05b78133dd94e0d8564b67e63155d53d8afff428b84546be97fcc739043f0c5e. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a57bb860-e053-4f56-981c-726e2faebe8d.json and https://artists.proofprofile.net/proofs/artist/a57bb860-e053-4f56-981c-726e2faebe8d.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd95d83c4da14ca4566885c40fe25ce117c7ba0a5b2f3a9932a99de725568ba6d. 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/US38Y2306051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a1fc0f9b7809be516cec328268f132096897afa056a2828e33b76298cb7c52c. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE2406334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ccd5fb9fefa134d28f8402a8ed0f88a7391d65ea3ba4ac43652e895c3b860f3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/GB8KE2306042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa67d7c438c2cd36cca176bcf6957af91d9d3c2114db222b9e9de7aaa5ec552d1. 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/GBKBH0502208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae6035aa0726987dfec6ce8209e4936adc928d2c0294293d6eb60664a5740db3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/UKK762451015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda99d083ce530ea21853983f22210bf76e2593a4c86147ba9ce0b0e9dea7c3d0. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GX3Q92093232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ac5120ae7dcb7d22e61ded3a71d4073835de170479c5bdba26555447ab1474c. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/GB8KE1759285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fe471ffcfa2336e5adbc5c02f98fb11b0d1e621eff249b974542ffc4b02e4b. 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/UKK762450115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bebcf8bd97efe90be39d7d8d98a88ceb807bf35e3e61b089c77a15d71fefce0. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/GB8KE2411063.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda0dbbcca8cc7854b45d8248eac7c2260df5ac5ee99a9fda475974a4f5ce6263. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GB8KE2206992.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4a3f2dd4df5a68a6fe63537cbf2461908c8a89bc34a4c1f80582ab634277c2a1. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FR2X42215999.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a2ee319fbc7ad373d8332f942601f2e3f03d9e25ef3874561b06ec542b6d030. 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/CAUM82000261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce516823c60619dcb5beb54d792622c6dd2cf997a7d872823c10df28ebd2ec15. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/GB8KE2406330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2968d001f9e4eccef9d85c05c1c7eaf18678c45ca58b7848c7eefc565ba660e9. 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/GB8KE1857962.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c0995feb9c36adf7cf06c79780eb62d480171783ca05462446c1aabdd1f2ddd. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/GB8KE1758078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c5cf4f24080327cc8698c7ce79d63ab96ff36e4dfe0afc73af1f3027c3ee29c. 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/GBCYY1300491.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9703fd1ede7f3548bd42d414cc4ba0145d7e4531883733eb79a0e2638a221aa. Chain 2 (Bitcoin): anchored in block 960173 (2026-07-30T00:11:40Z), 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/GBSE31900250.
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