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 0x08fffde4b54d176208062052c05bbdc2f229b79c6ad6c8ac592b93b3d63a6ccb. 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/8236c97b-c357-4623-9466-07a1b5fb5d1d.json and https://artists.proofprofile.net/proofs/artist/8236c97b-c357-4623-9466-07a1b5fb5d1d.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 0x6794250adb947bb07d6c3383ae4aaabafc418b73ed1efe5bea7cf020b10d1b38. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), 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/QZFYY1943631.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x254839e3ad7ad1479ad5e6f89843e0a3a8145b83e06c927ae0c0df8e5320bbfe. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZFZ22131384.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d651732ea7838ff9fccaaa3a390633c0ef494722cdc6522f65544c579528197. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T13:52:39Z), 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/QZNWQ2128756.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x974d7df894e44d840c5642880f8a7994a31aca243563055397433bd3c49bdf4f. 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/QZDA52265585.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec23d93db999d3658ea3a386e1f4f021bd1ba1f813fbc75c2c2412a5f818d68a. Chain 2 (Bitcoin): anchored in block 958816 (2026-07-20T06:37:24Z), 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/QZES62251427.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f76c253cfc5a0d0a309bf93ee3a6f949ff297468666b4a729e915c6f54ecc3f. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLK072200117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90905e9018e95f9ed515618ecdd2a38293f3b96c95dae9b1bf293a1cf6e0c548. 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/QZNWU2233479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdae5bcbf17a6276e70fe7a6ba9c288b04fa63dfce9d68aac12115b2b72be915. Chain 2 (Bitcoin): anchored in block 958582 (2026-07-18T16:47:25Z), 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/QZRP52215221.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5283177ca1a8c2b9f12056ef70069c4a50bdb26a6ee98727e43863ccceb63a3c. Chain 2 (Bitcoin): anchored in block 958746 (2026-07-19T17:37:39Z), 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/NLRD52222591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x153fae1bf23e777d735b5a0a2fc2a936331c600257db2bef7814a4d87d15988e. 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/NLRD52222676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3210407d9991314747189169aaee3cd04f8f841de1515ca6558290a8a47e1c36. 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/NL8RL2332697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9beaf29257c7e3a0b35a0671ce9370871e062e38ae437daaeb92f4407c466ee0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/NL8RL2332698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaba0d01b26d3760f39b36ff96c56706c9cc418c71295e85ad005cdab3b938365. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL8RL2411122.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54c98ab6bc3f2411049efe4fe9fd674d1f63ed830609bea6a3ec18fd8ccff437. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/NL8RL2420176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf14c14dafa70a80af66afaaa87db95acac0155da3d1573746c476b84b4bfe0d. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T17:31:53Z), 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/NL8RL2441140.