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 0xe7ca29f020715436df5482cad52626f1bc4d8ff4901c6a577c0835242c0dbe46. 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/1a7a2680-5185-4d33-ab9d-e4f757ec8994.json and https://artists.proofprofile.net/proofs/artist/1a7a2680-5185-4d33-ab9d-e4f757ec8994.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 0x2497a84677bbb26b14e54fbe886d98a340ef7e928d776b8182ad6de78dc61e4c. 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/PL59G2300321.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e77b1c09bb2735a63c5f8019fbb5bc4f7df284ab2a4cc31a9a37c70d3f32e94. 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/PL2DY2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa09f8e81870f7e3e85d558c64bf4b96049bb5c27558e574c5468f772d00d15c2. 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/PL2DY2400275.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd81a9057ca8d68fdae11f60ab5674666606596636c6981b3d6625423f3ca18a8. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/PL2DY2400269.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf7400ec97b50be10d66530fe5012e5d76ad8fc8f7ebd03d7921fdae1a7f076d. 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/PL2DY2400272.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdcf7d20a75e363fd756980be5c4ffba469c92f2fc3bab52997163dd0643175. 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/PLUM72400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2eab95358259aa23ba3ac76f83d3c493ae236b7b1bbbf2f0fe99d462a7552681. 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/PLUM72400111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555d748bc5fd36289a26b410921b729caa38ae335c773a514f57d7062f58f54. 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/PL2DY2400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e77b1c09bb2735a63c5f8019fbb5bc4f7df284ab2a4cc31a9a37c70d3f32e94. 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/PL2DY2400243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa88265c5d431a644a56494bceb86cd830d7c6f4434316d90d59a1fbc3961381. Chain 2 (Bitcoin): anchored in block 957064 (2026-07-07T16:43:08Z), 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/PL2DY2400273.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6ff4bab8da8d2a7fbc3b3d4408b7c30550f3a43162ed7aaf2b42055179a81b0. 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/PL2DY2400266.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6223196d28856980af358fceabda0d04393924911d0d3c742e9e9c80873302eb. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/PL2DY2400270.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37a4108100b195610c0118bf8d56642a94a7495858948a443aa6876cd0944613. Chain 2 (Bitcoin): anchored in block 960106 (2026-07-29T12:41:21Z), 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/PL2DY2400268.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1a4e7e12bd66e97f9192a3b5718b2799866dca7da5a684eec8e1f4d6f5cd116. 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/PL2DY2400267.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20f064be728d725c7c807bb0c32f70eaa71dd33859a3f62ca43d4c31ecd7defb. 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/PL2DY2400271.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d9e1bb4055e84a81cf0718042c6fc25a566a17c300f886c40c7dcbd408ef501. Chain 2 (Bitcoin): anchored in block 960247 (2026-07-30T10:42:33Z), 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/PL2DY2400274.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bea9a0a1d44fd46011d853c6dc3c4133cff85205cf1a2f96d97b64389be471a. 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/PL2DY2500052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x922d7aa46076312cdfe43409ccd68c9922a03826360c8aa12934cb9cc0c3f192. 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/PLC062505155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd9885aae04acb4db74bb911b1fec70efe3fd95bc8bb07864dc371e432ec18cc. 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/PL2DY2400499.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcca3eb0824e3c1fef9ec8f569d65cb4a4293c77c40ecc0f869346c85c74c053c. 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/PL2DY2400470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5172ff983878320aaa61a3522a1c1aaa3be7204af031fd897acb4cccf0eaf677. Chain 2 (Bitcoin): anchored in block 960337 (2026-07-31T02:51:48Z), 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/PL2DY2400498.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8e63929a8e2876f341b44b05b6f4f9bad4bbdbea77426571a4e0f43b4d63025b. Chain 2 (Bitcoin): anchored in block 959146 (2026-07-22T15:41:47Z), 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/PL2DY2400501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34e6f232da4df0264b3217c2e2ec15197506d7435764f8ae742c75df8f449b3. Chain 2 (Bitcoin): anchored in block 960513 (2026-08-01T04:52:22Z), 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/PLUM72400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98be56f547bb6ffd43f5adc7cf8bc7486d0569e686cf4dac3f4a41aecb84ffe7. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/PL2DY2400500.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4dbf998eaf8bde384c0e74bd8c767d454639d8f30cebcdda23c0e42b96b7c14a. 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/PL2DY2400502.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb34e6f232da4df0264b3217c2e2ec15197506d7435764f8ae742c75df8f449b3. Chain 2 (Bitcoin): anchored in block 960407 (2026-07-31T13:26:30Z), 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/PLUM72400255.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0555d748bc5fd36289a26b410921b729caa38ae335c773a514f57d7062f58f54. 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/PL2DY2400256.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecdcf7d20a75e363fd756980be5c4ffba469c92f2fc3bab52997163dd0643175. 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/PLUM72400108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd232ccf1b417276c30d2be675cecf4cc4587a382df08bdf4134e8cea4d4982f3. Chain 2 (Bitcoin): anchored in block 959159 (2026-07-22T17:48:40Z), 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/PL59G2200314.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x814136d0fd13cf75f478e230d8f36574947dc711a1b1c4232267bb21d8f692c3. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/PL59G2200296.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d1b1ee3db090865788718ed786eeab037a6bf3b58e88972be0a3ef1f999c526. 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/PLC062386834.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x05efbcf4384adc34dcb9bf285f138455ed59d58fd35c19048ccb33a86f75fc3b. 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/PLC062381280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26bd64f35972fb32d2bb4b0b89aae036d5f37e0af49891a53608ab9de65622b8. Chain 2 (Bitcoin): anchored in block 960487 (2026-08-01T00:15:43Z), 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/PLC062386837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29da461af4d6be80b96c8f3fe35417963b11580b99366f1aff024fe36bbdd7ec. 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/PLC062386843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44f38a83f28c5d332f37dd1b439cf04a70bba98d53951cb5dcfcf1046f56ef5e. 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/PLC062386363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cc69f136193a0f8b4e13199bbd534529fee1311f3817e638511a2c64f7eb403. 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/PLC062386844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd30ab54e5918f55ad5642b02fee3717f3672a902c6e089b1fb0c84dcc0ab6da1. 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/PLC062381111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4bbcc8d423dd76ec374217caf525057f4e1a9ffcb10d63617ec06dd96b2b1708. Chain 2 (Bitcoin): anchored in block 960379 (2026-07-31T09:25:34Z), 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/PLC062384071.