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 0x9c67d26b989423b7546809eb4863004d62d0fec2f2251d41572892bac4c3a9b1. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/131fed50-6c8a-4d71-84d8-a38bb0febb70.json and https://artists.proofprofile.net/proofs/artist/131fed50-6c8a-4d71-84d8-a38bb0febb70.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Hairspray (Original Broadway Cast Recording)
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 0xcedcd1c66b9238e060f2125494e8162b2cff089682967b9c086c3fb07346a130. 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/USSM10209968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3192f1b0a67751b864345180c229ea5d50696d8a1cdc89aef7dc6ed9321ae980. 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/USSM10209969.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d71e3e1d58a1c3dde260c9c187653e755ba2f8b040f5a782887f0ef6f92fded. 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/USSM10209970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94c205d180a12216b5d07ad541a39635a63872ddb68c1cc6e6d0b71e25c73536. 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/USSM10209971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c04c34efea8dcb623d8d78ad983e97640b63aca66d3788f72bca375b495eb6a. 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/USSM10209972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4f43494e30eab47dc56a7918702e62038bb11a8d225a3b87307ef6486733bf. 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/USSM10209973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8bfdf9eb3628e66b8d48354064b5f77df7e79ad12a61b95af2d7f1d89085125c. 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/USSM10209974.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x290af4f86df929809fac47dfd8fd61a89c4dff51ad046e55ecd6e9110cc41d31. 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/USSM10209975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbdbcfac5d7118ad0fec03c48848fc1e05f6d65a3c58ec135d28b5bfafe7ad470. 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/USSM10209976.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78ab3c9cccb755422cb00e5289f387c3a394800befa80b9b167a4683e401c29c. 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/USSM10209977.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x498ca1c772694bd9b3e0ed3566312fa8c26ff220d04366afe1492f65c4b6b9fc. 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/USSM10209978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6978e8d03fbe1e69b8c266ab0a22d6e768bd94475c6c1c94b04c871090297a9a. 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/USSM10209979.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ba1ea07f891bee2341c9b71d4252feb6ccbdc7264f2889bcfc4cf1a02122bb. 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/USSM10209980.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5886225c0c22ee9ed5b7a08d5b712184f1c304f46c7924838c97f6dfd7d9e18. 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/USSM10209981.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cef654da32ccb3db320da289358bf5eda6708cf73bdd75fe9747a9ff37d84d9. 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/USSM10209982.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60fe6844c00a171c3382e9641e9a677f4c2ab270fadde97c722d2171412c2c5b. 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/USSM10209983.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabb37b3d6c0386f87ef6ad7357800ccd349ca3f71700feb179dfde968461cc62. 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/USSM10209984.