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 0xd231adbef142b23a8d41d4dca291eedd6cee24c0e0535ae32815793bfb575e64. 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/7a075b67-4275-4a1c-b7b1-bfcea4597ef9.json and https://artists.proofprofile.net/proofs/artist/7a075b67-4275-4a1c-b7b1-bfcea4597ef9.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 0xcf5cc8170936ab7292f86bd95ace808475f6471393b8f762a0c07400219c2272. 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/NOCTN1701061.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6b778bb3042cf0cac15cd5b6bf74141c3f33f52ea4604edf87edeaad14c9f261. 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/NOMEG2302010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b5eea21307269f8de929a691eece3e444bf5f3e04935f744af96a25d0e7953c. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOMEG2302020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca1d4779f7fe736d77d4620808888ed07fa341f0c1f48234efcac8a52868493b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOMEG2302040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa83cc385b220427aec68b853d9f221a0a35feec74f94de0e26214bd91166a092. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOMEG2302060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71c61db769ccf2a6e013879e041dd71003f636d2b90d9ed3badd090d77db53aa. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/NOMEG2302070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0db826abe7c013f504a72e8b32bb46ecfaba3a784b18632e0bd4dbaad958ea82. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOMEG2301010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a45294c8157093775e87571214416df35d90c2bd36db4602f55f62d8b35a4f6. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/NOMEG2302110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x215d83838e50de77f70acac22a19190dae5e7941b8c8b5b8c09eaa2c2d38cd21. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOMEG2302120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d31b9570d8e22b49d698b00c44883c3ab46fa2983f8c6ea4775173d3720f19d. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/NOMEG2001010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29c7dd1eaf48c7a36b54073a04ea97250f192231c509e365260b254bcb38dd35. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NOMEG2001030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0cf89d3fd976cbe50e8ff36afcba822daf3096e157049feef92b020704ba5678. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOMEG2001040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb6a56b61e9b4587765034e6d8fdefe2b423428ff7b1b82fb414c92a0eaf1e14b. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/NOMEG2001050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x184682a831031d9f9e2e8fc51a601f77e5523785c18f138689b558be9f67db95. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/NOMEG2001060.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb6a7b65989ad4dbd7f8d251c380ba29a8a2ca62edb714cc4b09d317088f6716. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/NOMEG1902010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c2ca9d1c9210a4d7e008d08cb620aaa82ebbad2ecd091ce36ae010d17d23ca2. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/NOMEG2302050.
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 0x3e593ef0d7936bf5d6d095645eb5c56baa80b902b8cc3af38be6442e4029f20b. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/NOMEG2302030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42379c7618684fed5971065600bab145ac7e9f84012b912133adc7f0bdf4a6f5. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), 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/NOMEG2302090.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcc19006cf3f80e7458d6d044cf4308297d7f87457f19038a4cd50b471a93180. Chain 2 (Bitcoin): anchored in block 960167 (2026-07-29T23:42:34Z), 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/NOMEG2302100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88771691e11bed950b9ba4d6eb291ce8360609e3ed6345e9cfa89c914f91a591. Chain 2 (Bitcoin): anchored in block 960164 (2026-07-29T23:23:05Z), 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/NOMEG2001020.