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 0x90e140aa3b8a2c15367f12acc3bbdd2f283c15109f7aebc62537cb879d2d92e2. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/32f5efa9-501c-4181-89eb-2add811d49bb.json and https://artists.proofprofile.net/proofs/artist/32f5efa9-501c-4181-89eb-2add811d49bb.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 0xb3a685df5e04880aa20acc5e574f9e2a254bd25b1fcb3714bcd438859605f9fa. Chain 2 (Bitcoin): anchored in block 957750 (2026-07-12T20:39:38Z), 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/DEPI82448411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x126dcbb40c0a62f9f72545e0eea10e2725ab3da1dcb43a5be767af1bf94e73b4. Chain 2 (Bitcoin): anchored in block 957851 (2026-07-13T11:26:33Z), 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/DEPI82448413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383b8b0369d59e21aa0f82c5a4b039548a7bde943bbed749a3935b3bf61d9f19. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DEPI82448973.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26c10ba4702137be3b90758c456834270faa319be224876ac6a6951e890e32d9. 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/DEPI82448967.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x071d66593ec7ffc08de8b86a2beed9c5e9f5ce572cd0b3ed9d2849cba381b53d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:37:43Z), 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/DEPI82449148.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x92a5c81a5c8d0717191527a406de76937ca16e1c011e2e1e00a7b8233db39cb8. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T15:48:23Z), 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/DEPI82449150.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02a39fcece3699f202dc02daaf1099ed88ca7b235be28523a6454a8c2495a693. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEPI82449146.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe944ef2b782ad9ec98c7ee96eba4afbfc9dd906e53cec73a5ac1cd58bd77daec. 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/DEPI82449149.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fb4d6f1ad9b1e0f882519722956480e372e05b69cb4a6e9576407b05023fdc6. 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/DEPI82449384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7897c77b8cd1418c005bdd2f8f00025bbf06df2c6261dc77facd3094ea88ea77. 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/DEPI82449386.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f6177eae6ec1291cea1f137a3e59576cef811f4574645780605e4f77865cc6. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/DEPI82449167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbf076a435f06fc540c418110a7be4da9f563915624e5ea04ad8e8dce3e1d126. Chain 2 (Bitcoin): anchored in block 956420 (2026-07-03T00:42:11Z), 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/DEPI82449867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2dc19758c6b1b0155ca6465c7929febff163511e13e3bc8405bd4d30a5ddfc54. Chain 2 (Bitcoin): anchored in block 956790 (2026-07-05T12:31:54Z), 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/DEPI82450112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb6b9b138a5918037e11028d9e80b96f63e39f466e00aaa2a154e43c2485b111. 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/DEPI82450114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacf04da1925211d191d5a28e86b2d1e5debdb4cb50afba1cdeffe61236f79de6. 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/DEPI82450120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c48964b8c5ca062aa571bfd6b0eefe8dc840864078dfb340fd594407f0b9c3c. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), 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/DEPI82450122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb084d58a4744bf103564fe0b14f26f75b2a399c19c4dbc029deb25f2ca418df. 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/DEPI82450126.