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 0x46f8cb3ff8e58e8e3cf3185b4dded5cc567efaab4add1b7b021f99f0338402f6. Chain 2 (Bitcoin): anchored in block 954533 (2026-06-20T08:57:02Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a43a2d85-ed74-4d5a-89ee-125bd1239c39.json and https://artists.proofprofile.net/proofs/artist/a43a2d85-ed74-4d5a-89ee-125bd1239c39.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 0xd147b7db0e6121459a06373be436acf58a547c6a00cb8c7558b4ebe9a86ea31e. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/DENV11000003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2949b95abc7349ec6ee2f2619e02ff754b89e08e0f3a430860b5474a71c431d3. 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/DENV11000004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdeffa1b67625ae03f87d65d7d2649499bc4e9f1946c48ca8f8b7385cd9684609. 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/DENV11000007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x56adddbd00e89223734cb73198a4048f5bad159db5fb41e0071550a41daaac6e. Chain 2 (Bitcoin): anchored in block 957253 (2026-07-09T03:08:40Z), 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/DENV11000008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc3d23175eb548bc24104df1d5ced96705b1b2fb70fcb9579936321ee58228e4. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/DENV11000001.
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 0xedbbfe470bef5ed434ded9ddd8eb2e517b905c0c7941dc0a3c58d813469a4084. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/DENV11000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20cf838ac100837d33b3bd7730ba9ce6c658db209408f5b0d18b2babd01229cb. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/USHM80666180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x32c3039e9071ab44af26cf97b53569411b676e8addb279daad279e751095bdfa. 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/USHM80666181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee58081c3e133bec1acd55d53b81a068fb3bd99dc75ca186ffe9b00fb9f593d5. 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/USHM80666182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb89d94c58b821ce5478ce7603d9888fdc568a5d20fac09d337786abe749ed32. 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/USHM80666188.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e4c4afdae71b4eeb24aca338693a14611cf5b8bd0163840cf79f2bb1c87b625. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/USHM80666184.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2768d95d7126b95df6c56e4aed8fc11c4c174652751fa71e70f7fca2e12443c3. 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/USHM80675008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a968c3b9f493116239df8ad9a4dc560a89dcefcafcd6e65e2fe89e8ccb7c306. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/USHM80675009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb220aac667c92901c16f58cfa07db2ec62bd313ca14e8ea5f4462daf0a7d59a4. 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/USHM80675013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aa9823e6ea7f45ab64e12bb7671279e4410e63b7f90a7721930543e2d37fb02. 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/USHM80675015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xccf845a3852f4b0a3733737be21a04c73f52dc13ac698c46dc44d7a260f55476. Chain 2 (Bitcoin): anchored in block 960138 (2026-07-29T19:35:34Z), 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/USHM80675010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b1f02cdcf9165a19bbf1f643850b812a38bf1f3171bbfc0467d3e8c34508a0d. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM80675011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a683bf238ab88a6750ff37d019e26f892f86f0d18476a98718b162a5d4cd16c. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USHM80675012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d4f34aafa11dac0d3e3792b1939a0912bdea12b227c6c994a925657941bf0a. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/USHM80675014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc658d6fe33b7d25f1b849bd6c149ca0c824c3d543b29ba5f53fcd591cd05524c. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/USHM80675016.