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 0x1930865f2495405f3e59b227bc8839f5cb61fae73c5141025e27f9d56849a8fc. 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/b300f38c-ac89-42c1-a6bd-69ff98c74a60.json and https://artists.proofprofile.net/proofs/artist/b300f38c-ac89-42c1-a6bd-69ff98c74a60.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 0x6b5e9dcc6a2ed14521cc055eb9749ac0e488237546cbd8ab6959f582a927edd1. 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/ATKG91200101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8763b8f6533bbc036845d5cd448fc81bb17bbd735abcaffddda445e43b1c5ef9. 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/ATKG91200102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2f8bc0c43044636eb6a81a639386b4741074a4baebeccec660688516ce92f0b. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T23:16:09Z), 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/ATKG91200103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d185ee846c712232a831011f196e06b85daa5d0b5f36aee0fe5559c085ff05e. Chain 2 (Bitcoin): anchored in block 958448 (2026-07-17T19:49:21Z), 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/ATKG91200104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd479b6c1f0779467c9f8b31a16f31551ce37b65c468868f493190071d90830a1. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/ATKG91300109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2ed83b2153fe941792a54ebcf5408033084d50eecde698f9c0f420105b4a3e. Chain 2 (Bitcoin): anchored in block 956776 (2026-07-05T10:59:37Z), 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/ATKG91300111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf62d821284083584837e7f3463883e5995dbeac48249c55eb9c1f2a2a708a186. 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/ATKG91300114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42200688984e2ef23865d91c751be2064622954e8b70e0b7503ea0b75838b115. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:03:02Z), 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/ATKG91300116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf9b41878dbc32999f1ddfcaac05a0186229f6b0995f53f4eaa000a571b2bf009. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/ATU331706901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50cd474f59396b70fbef18178554e2893fc83eeef797d7c2b631979a7265f2af. 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/ATU331706905.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42bac44c73d8b20ba45cc1f5b5b71ec66053d91f47d7f946f6598774b45d24cf. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/ATU331706906.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x145e0746b3c7fba602c0f8003c2f5147017c9c3fa930e85dfe0deeca2e8be816. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/ATU331706907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84873ae39aa137191e8e75c95be160a6a9d87573a5ceb94b53c1e6a3dbb8e6d5. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T11:06:36Z), 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/ATU332112005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c6e8ae3b015cee9364397c7f805e9e5edab6f28e326280ca6cd4dd1229c554. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ATU332112008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb32caef563bc28fc7b2ce000da6034a29746dc94e9e0d4149ff0539e7d4b1e20. Chain 2 (Bitcoin): anchored in block 957050 (2026-07-07T14:41:13Z), 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/ATDQ92460012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d0ddfea0125ed211b213be12afba812b8b4dcb829769b6e2943724c593cee67. Chain 2 (Bitcoin): anchored in block 957020 (2026-07-07T09:18:01Z), 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/DETY62000015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf20bd4429090b171dea1776bba59d69b1824be8b5e88aa88addb4bbe1ec35d73. 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/DETY62100042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf76b5dcc84c88629d96a58c2470e62aa2d019f34043c3dc9374f923cd1e52d94. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/ATU332011110.
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 0xbf5dc27d84f831e9ae7e86541251a9ccdebd7ef5a0b689db6da01b94d9abfef4. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/DETY62100043.