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 0xe7aed6e08ae275f923b8cbedfa7182bcf91911862ac7d38854aa2963f7d86d97. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/d35e3eb0-fd6f-4a4a-85d6-a575f6825a01.json and https://artists.proofprofile.net/proofs/artist/d35e3eb0-fd6f-4a4a-85d6-a575f6825a01.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 0xf04898891b825a8bb00ef00279251aa373ffb05118f8dac6a4688e6b0832f685. 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/USCGJ2073413.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa73943b759bb0dfc431b2a03d5e05dfcda515d04a272fa1faf84bb0716e1b9f0. 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/USCGJ2073420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d18ee1cfa2636acd16b019e5148d8dd307a1cae48bc351267a06ee01ad4f015. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USCGJ2073410.
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 0x118ab150c1c44d58ffa779ba7fc1abc8259b5435335abfa05c4b3929bc886284. Chain 2 (Bitcoin): anchored in block 960429 (2026-07-31T16:07:24Z), 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/USCGJ2073411.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x117a2620a71e7eebf946abc99507f3b0f55000c3d8d6113f93786ec04f9076f8. Chain 2 (Bitcoin): anchored in block 960478 (2026-07-31T23:30:38Z), 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/USCGJ2073415.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20c48e92a7fae02f780e242f7d26e89ece2961f8e0989623c94cb9ad46d490db. 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/USCGH2199627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x197d1adfdae369bc14c376a13416d5cffab60d523cdea61b0ec5453ed5568825. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/USCGH2199626.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x49f6b62aafb4640db9ee6a1a2c0cbb88cb17d4be8eab36922467fb23329b5a4c. 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/USHM22363006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91cb1a729a0bf8dcde23ca66ab189df89ddfddccaf4e6f47012bcbdcb45e06b5. 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/USHM22363008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c1ffa7ef773517107f8e40efb173d5aa1968d3dcd364eb19132bd8eef0b0a27. 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/USHM22363009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7eaccd4d361988e8a14f9caeb8fc3532b2e58a394e59b8cdfe8285dd31a1665f. 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/USHM22363012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313f47b5f982207a14cd66ad701b98c4747212d04d6fdf8fe1bf4d424839c929. 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/USHM22363013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6de7870b3ab4049235efec652674344e8331586359a4c9d5594fd340552a05d. 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/USHM22363017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03808d9db6d4481dd24ee1f139b49d4125118712e9daf5b79e17250997d6d1d2. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/USHM22363018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2407e2901693d778734c43a918eed1d6fdb6c489aab9d4cb5dcfe0e8a0d86a2b. 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/USHM22363020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4889fb39c9d8085a7056049a6da4fbda679c6a1c8498d0d7230c2d0bc1fd4549. 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/USHM22363021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b0618461517f61000479d8bda5411d1cfd86769193393c1ff88846a58f8adc6. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/TCADN1882687.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x336eeab39ecc7d76f06b00b749ea304980f5a9a08dfcc601b2a349c507c06eda. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM22363007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x899ca20249c75aa2b16b43dfe9fa4baf1c73e16387011c28e63218c900765a3c. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/USHM22363010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950fff003dc8a58cfef655a5a81c3ed3200dcf698507eafeb9d2d32b8412a322. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/USHM22363011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x127ec8bdcf22cf79d557d3a6c6a322745d202bc1612f6b86b354d431acff04a9. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USHM22363014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fab1f9162499cd1900df581561f3137fc4ebd098cfa738d7b5479bc8d7f3f54. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM22363015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d962b6c9b6e756f35768dbcc4c59d61943ec9ec8fb5c07c46cb3af4dc1ecea4. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/USHM22363016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e90f673234f6c7f4fe928e334ae9cb57fecdecce7b601462795474221d6af5a. 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/USHM22363019.