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 0xeb1dd2869fcc25649a1558b15a1ea73e7895d6e9a5a6ca3b39014efef27e4d8d. Chain 2 (Bitcoin): anchored in block 953803 (2026-06-15T15:41:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/e83624bd-035c-4c6b-ac62-7dc563227f78.json and https://artists.proofprofile.net/proofs/artist/e83624bd-035c-4c6b-ac62-7dc563227f78.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 0x0a9e0d568685ba49db5a9efc677e8ef1bac286196b2c2107bbdf616525447700. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:45:56Z), 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/TCJPX2337671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e0a77189b4e520adb276de02e6fc183abbd18b926181cbd272923b3e1ba6cbe. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T19:59:48Z), 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/TCJPX2337675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x73e3ccf824f3cc9ce67395439cda0c5034a7bddaef092c1a42d593011ebc8a64. 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/TCJPX2337689.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd80a390d1299e138230d39a60a348a1bc9f0eca1e97aa24b3712773c5b2963a. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPX2337691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0a9e0d568685ba49db5a9efc677e8ef1bac286196b2c2107bbdf616525447700. Chain 2 (Bitcoin): anchored in block 959054 (2026-07-21T23:02:59Z), 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/TCJPX2337671.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff16eeea6d6e0d85ac098dc2934633ae8030cd73250e3d4b0615405cf7e19ab6. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/TCJPX2337926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75d832f103bf532e65ff4f7b523303ef20f3363c9990a1cd664af0c00fce16e4. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/TCJPX2337931.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4530bc7c709eff0b791377331b5a21857812b13c2e8774ffcc3f5e8b5a11aa9. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:00:43Z), 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/TCJPX2337934.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3975bc59a6d00c0b017b6f553540201544efeed59a4cb4746c8bb02c6452901c. 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/TCJPX2337949.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff16eeea6d6e0d85ac098dc2934633ae8030cd73250e3d4b0615405cf7e19ab6. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/TCJPX2337926.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4530bc7c709eff0b791377331b5a21857812b13c2e8774ffcc3f5e8b5a11aa9. 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/TCJPX2337934.