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 0xe4d805438d13376a83c6157fc2fc47af8f71b15e6e066d4b6855de9580163319. Chain 2 (Bitcoin): anchored in block 954623 (2026-06-20T23:40:06Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/cbe76dc3-414e-49f8-9d8b-d77491f67516.json and https://artists.proofprofile.net/proofs/artist/cbe76dc3-414e-49f8-9d8b-d77491f67516.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 0x96537cf5cc2453a74052cf93578834602da8e5b9c8376e4c401999805954fd10. Chain 2 (Bitcoin): anchored in block 958152 (2026-07-15T12:00:27Z), 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/GX3HH2260600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6c1a27d45a7149a477d26023ac424d51a584edc390319d23f72490bf1f4ea0a. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GX5MX2545356.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8502f21616320828decadcf41522bd9e472984a11cb124b8ea0fb1777387a632. Chain 2 (Bitcoin): anchored in block 958905 (2026-07-20T16:14:34Z), 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/GX5MX2512108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d32c3bafdb36490ab4151ed72d7351004b789669b3deac2e1512984d6aba84c. Chain 2 (Bitcoin): anchored in block 958873 (2026-07-20T11:48:10Z), 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/GX5MX2507786.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29a3e422854d7600da1eea5fff24ad8bad1b24293f4ded7e835c91e19d5c107a. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), 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/GX5MX2561226.
Medley: This Is Real Berk / A Romantic Flight / He Has a Way with the Beasts - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe294e1d79030d39bf518cb97ba3525b97655550f016f89c49b3b2af1324c4f87. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/GX5MX2591277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea1b5e3230e96923b25b2c0caff4d20690a1c453b3fb00eb039db1e38707dbb7. Chain 2 (Bitcoin): anchored in block 959088 (2026-07-22T02:14:33Z), 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/GX5MX2542337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e4d61c7c27f9557bbd89c9fa00580efb695d0f7010f168011dfc24ef9028b7d. Chain 2 (Bitcoin): anchored in block 959114 (2026-07-22T08:41:42Z), 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/GX5MX2561312.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x24e22cb1aa7248520bebcd94de3e044825b706b7df3886a543f060f9a57563bd. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX5MX2542215.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b1605f4bbaebeccdcea450516658030022bc6b4cadfce7380c83d6438b6c62. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX5MX2515713.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37375f4dc9e12337fd88d3276c0ae6639bc22dd3be515d833e3705abdf297b60. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/GX5MX2500026.
Medley: Enamorada / El Mundo Bailando / Salomé - Live
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x990b7cabc641a3cc7d416a99467d2a34caaabe77ce364dbe7786cbf7e873a4e0. Chain 2 (Bitcoin): anchored in block 958774 (2026-07-19T20:03:27Z), 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/GX5MX2560545.