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 0xe0e82be32824234c98d0ee9fda3a65ce32043ae1242a422f1309038574f8af5b. 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/f1c78667-59c5-4501-95aa-f6281737d891.json and https://artists.proofprofile.net/proofs/artist/f1c78667-59c5-4501-95aa-f6281737d891.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 0x6a9d0d9dbb27283b574ccaf7009a4a513522f02bf0f4e9d17683350009442670. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QZRP42121591.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4534c3423df3a3ac7a8b66c33db4bb0bb9fd2e941f61a1d23846d1a95c3595f7. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), 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/QZTAU2233260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0281f1c36ff5773f4db48fbbd5cfe0ea109de19722fc9e8935f468c4fadff12. Chain 2 (Bitcoin): anchored in block 958256 (2026-07-16T07:22:18Z), 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/QZTB92353001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b3095f69a3cfd85f3a69b0bda586d52b21dd3330b0f5ad4386176858a640bde. Chain 2 (Bitcoin): anchored in block 958404 (2026-07-17T11:34:58Z), 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/QZTB92353003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66f9b19942b0ffff6986fead3468a66e2526718c590ce5e33e254d646d258454. Chain 2 (Bitcoin): anchored in block 959069 (2026-07-21T22:32:59Z), 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/QZTB92353004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x793c06f0dc72205e2dcb56672ac63d1b9e830042725746c7026ac30cb3b39db4. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAT2447465.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb25d4231fdd945cc8c5f170c2f65689f86862d0eb37284b5ae809bb93a918f85. 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/QZTAT2447466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9b5e658aa65e24baabf95c0271f9f043e78a93051e83d4bb8b9ad2c82669bf69. Chain 2 (Bitcoin): anchored in block 956841 (2026-07-05T22:14:35Z), 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/QZTAT2447467.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xacbecf6af3d269019eb938324e06f16d6bf1765e4bd9d78bd4a01ff93d3230f1. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/QZTAT2447468.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b8c66facd81206854e6141576c9e43927a727bfbd0cc70a4d343dcd6fd15445. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/QZTAT2447469.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x47ea792d739b79940068bed396b284fc01212ed7be0378c9d544bae637164e08. 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/QZTAT2447470.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf57701d9f43e57c987329ce6f17218914d2124ad24475a9a8a11c8597ca403f7. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/QZTAT2447471.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb5ac877faccf3dd5b8c47810238cbc39eab289f857896e0c06a0cd2c982a193. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/QZTAT2447472.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x268fa071027fd257300f0b43887bcef5a2d15e42f5cd046c4c41057caf8aeb03. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/QZTAT2447473.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa4fe9af7e4d77e1a96cb0f21df2f52790fbf78cc6e4af5b03191a809ec35c9d1. 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/QZTAT2447475.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x00a02a0c1a2deacc92ff0bbb7784fdc36e6a890fd26fa60fb6507e2c92630ce8. 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/QT3FD2539000.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23cc4524e3bc2ab8367ed35ceb285cd6af894a4babb063e6f709cb8d0ce1c64f. 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/QT3FD2539001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27e848217c171b3bd3208bab3b117c2d7e5babf0fe8115e26ed0e1947aa16837. Chain 2 (Bitcoin): anchored in block 957788 (2026-07-13T02:37:37Z), 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/QT3FD2539002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd44cb3b1b6a252e316d47680fd4ba3b9c9a28009f5f34257bfc300e6e2530f3a. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/QT3FD2539003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14bd37ac136a12e56389b6f8f9e799189dd5d95f17a31076437a6eb437a6f826. Chain 2 (Bitcoin): anchored in block 958197 (2026-07-15T20:40:29Z), 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/QT3FD2539004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a553ddbaada06d21048cbff6833fedd84dd6fdef9cf5c2c1ef5b1c31c4586c8. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), 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/QT3FD2539005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdf3092fc71c2154d49dbed27be0071c116b240bd80337a1f52d7798b04c6abbb. 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/QT3FD2539006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb4848dae949b14628a34c486720753c9d02216b7fcad3409c71a1b39000d8d0. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), 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/QT3FD2539007.