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 0xd1722055ea714d6da7fa2d2b91a55d11a511ba9b44824eb9a50cdf1a961595b8. 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/d4872c56-00c6-459f-9252-18fd744add69.json and https://artists.proofprofile.net/proofs/artist/d4872c56-00c6-459f-9252-18fd744add69.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 0x276b51033c47f8096f7e1166d2d6c355cd0145ff3f7bf6d2c8f7bc2f19d55971. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SE6A91948988.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5998540c1869ad41e6d975b1b3ad1120d9f68f50fc70ddf881e0310866f1d9a4. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX4R52270345.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec0ae61207c0a58d70f2bcdc8244780d8ae742677cbc17d1445c42275ec1b187. 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/GX4R52270342.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x828dd30ad91492ac09cec79bd5a11b82532263ddbf6bdb56b77df609166c2d1b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/GX4R52270343.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c3e2f49edff0d88c52bd369c941d7739e2b7bc23c2857e55d765ed55b663aa5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX4R52270344.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1aaa1877199d7afcbc0f75b335b248227e9d0c5133f1ff3bfc72eb31599ed2d0. 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/GX4R52270346.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x370cc50d75a052c6ca52cdc366396e2182c4660beff4536e3873073b852bc344. Chain 2 (Bitcoin): anchored in block 957754 (2026-07-12T21:26:22Z), 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/GX4R52270347.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d03320b8311bd7e6ff9dd161e71d77df3541d0d3eec9167d7212f386e6745d2. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/GX4R52270349.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97d7a5aee098a0fb0d5c35bdb0898f29cee9ec4af5e385f6025ff40eda293f6f. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/GX4R52270350.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39eef81123dffacc033ec82f5fc4577e4e5a44d0fdddbde88822dac6fb8cefb3. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/GX4R52270351.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bded1d37a072e02a02e5f438c659408f71e052b16db15e391a16d7b308580a0. Chain 2 (Bitcoin): anchored in block 956402 (2026-07-02T22:05:07Z), 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/GX5MX2261003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ac24578251ea1cc2193c82d0a7df089a4b32907b2e67ceaca50d3711e521163. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/GX5MY2229030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f241b565eeb2a28fcc9b499400de1103bbb9d826128035956c8127ba2c3588f. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/GX5MY2229001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2ebadf5ebd075ab2732c17af1bce7d9e884e3af7acd6de0ddbed54900335f4e7. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/GX5MY2282431.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe003d12f54a0973b55f08032da4715e36689b9c8f8abc0131f0cfdf155047027. Chain 2 (Bitcoin): anchored in block 957759 (2026-07-12T21:46:51Z), 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/GX5MY2282493.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82a10d2857c4c58dfb78b426e8103d053681e418d1b37bcfc7eb7dedfb63028e. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), 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/GBSMU0136053.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x439cdd1b4fc9b61eba72d2402232855a6b465f228914e51b797857b33c2904e4. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/GX89G2238914.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e8d2623b261095e080adaa6bed5ff4503f6fcc8ef393dcf8181fe937771ee17. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/GX8LE2245331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e554448e4778666d218c386328c72838e9f64f1cf72e50e9484fc931c25c6. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/GX8KD2347628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x635e554448e4778666d218c386328c72838e9f64f1cf72e50e9484fc931c25c6. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/GX8KD2347628.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x566a041acada757097fe3f74d62728b4dc76d3cf668cc3de656520cabc8f9376. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), 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/GX3HH2342501.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697cfe7e397d55971b3c1a8197863e187c1de0b210b95d85212dcbef9ecabd5f. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/GX8KD2477518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x697cfe7e397d55971b3c1a8197863e187c1de0b210b95d85212dcbef9ecabd5f. Chain 2 (Bitcoin): anchored in block 958091 (2026-07-15T03:17:03Z), 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/GX8KD2477518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96043d55fb7beac735dac44a93b6fab6f555038204a796c0796784d9217f1c6a. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/GX8LE2435051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96043d55fb7beac735dac44a93b6fab6f555038204a796c0796784d9217f1c6a. Chain 2 (Bitcoin): anchored in block 958526 (2026-07-18T09:09:53Z), 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/GX8LE2435051.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x052c4ee2dcc13e41cce3235a82c4a343ac44ef90dbb26afb54767602dfcd467a. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/AUBEC2360737.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8afb3152f8e155c3b0273e4eddf2762c53dcbd2a82863764cb44e26133ec390c. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), 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/PHS112500282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d39fc7911ef6015c604598a0d301219b6ef610cb98337b0e257f5a234ec9d66. Chain 2 (Bitcoin): anchored in block 957785 (2026-07-13T01:55:31Z), 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/PHS112500548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd499807a187e0ab7225ed3f76017058dd8d97cb1a4fc037a14534abca72ad167. 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/PHS122500574.