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 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 0xc35f332b562259f1a46fc437faab81de313302df03b1f21a85939a43c522d922. 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/ef395686-5e8c-40ad-96a7-423380772078.json and https://artists.proofprofile.net/proofs/artist/ef395686-5e8c-40ad-96a7-423380772078.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 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 0x51fe41e69174f74779a7901ad91857bf0d2fac0198199046687efd4a2a62a490. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121639966.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc57067d212d5e9acb735238d4cabfb1c864727c792040c0ae402f2fe97c165. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121639968.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce4990138e71b9482828e63b35b143bfb3a25d8c810a2f9330ef9e676d0325e0. 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/DEQ121639970.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1017683e712c3fbb9c7c1b48d5fa483649ab6f84f26a5b13143dfa680652c91. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121639972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a4a9fcbb631bf6e3380336f6efd17095e5720c614b28010b0c0b39ee804752e. 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/DEQ121639975.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf53f2e2ce57ee77a05dc3cae5720c36509977a9ffe1c9385cb61bb57fbb1e60f. 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/DEQ121639978.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x093b1d7bd51d216acbf85732325002269ada88286a71eb39c558208b06215818. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121430875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaf565e458d8bcf0987f6606e55c923ef929573913dbff01ca6800ee9c130b1e1. 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/DEQ121430883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd431fd47b8e7c004ac724f78de64e7c53af6793986a244f20242d4277d5b1131. 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/DEQ021902118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb091cbc9d238c51bce9a62ec8e3712ab13bd5e70599cd0a5eaa68f8d231f3814. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ021902119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fb952e1449929493d94fc9e7442e4e90a10d76021d74dc3885a90aca6471c65. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ021902120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeda7390e022c69cf9ec30922699c09b5ea5de1b118e898fe53c318603f87bf9e. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ021902121.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3c5871b456daa48b52b94523c3851288c95d072d4760e873c0f2e862bd20980f. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ021902123.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd00264f89014d1cc71b7ad2233cf77b7cffc7c6f43f3c727d99767cd1638d243. 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/DEQ021902124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f1cbb5a215d3c0683ffbfc13ed66c4f5fd36f111308fd79d77d1a617a410b20. Chain 2 (Bitcoin): anchored in block 959144 (2026-07-22T15:38:35Z), 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/DEQ021902125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4ec99cf69760b78043c06dc4bc5342f0533a8f2f68be4d9484ef53b4acadf3b. 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/DEQ021807889.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d2da55462d9989cb3d45fa0886613bbc1c41b5035e51ecd21d0d71e4b702912. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DEQ121641522.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf92f0cfe0fb2de4d12033899abf93cd18932378cf665134206e4c93e190137cc. 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/DEQ121641523.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22877ca273886d263d3b9eca900e3ea927be2ab9b05dd2523f00be1283fa4ed8. 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/DEQ121641525.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd6af1ed0baac6ffe79380803ae503147c15dde3be61fd5fa91e682ddcca25082. 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/DEQ121641526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7710b18dc66019a675afbeb3f3d91f958d261447de3dad9f2f254469eea9b629. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121641527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x89dba094e7bf64b2bd1ab3b75315bc9570c77809f6b9ebe9b6c80d02569df0b9. 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/DEQ121641530.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8231ff6eec7a518e384745d93db31963b660c46397fdb9c4328bbfe53c17a4f1. 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/DEQ121641532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3db0f4efa24c591d469d9ab8508d1f3cbe4321a117687a828632c6237c00bbfa. 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/DEQ121641533.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5786da02a4fe0d5a21c82e802c44682f9f4fe3d7248c8abd4ca1943d3143401. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121641535.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x044634abd93094101dcc5b8fef99dda74d2cff1b394dbe57adedd0dfa1a568ed. 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/DEQ121536395.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd93ebaa10c38c3a9744992f8f24c5d900534dd4e086b4024e0f6a12eaa153c6. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121536396.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x221923f68ad04fadf6d7d36f7225a4ddae801abac3335328f8feb21eee054ff4. 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/DEQ121536399.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcee6dce960e3dffbcb64faa1364b915357247befb98d57b893e0deec7fd79081. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121536400.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb00c9ca2c81a70ac45c7447024b375be2f2f9b8d35f9d6131ac441d8a41fb37. 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/DEQ121536403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b3c604305ad3f1e5dc2c1bc4daf93b4c3d68ac16759041ac516e017934cb872. 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/DEQ121536066.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d3bd2efefcd081c11a9c7dc6c60dbea478623f3fe4cd98068b09f3d8d6c9f92. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/DEQ121536068.