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 0x763d1088a391cf1c6012cd6a04ac580054e7f50c874fe466a91c031a2a935eb8. 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/21b6dae5-7903-421c-95d9-bfc5d5012613.json and https://artists.proofprofile.net/proofs/artist/21b6dae5-7903-421c-95d9-bfc5d5012613.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 0xa3e684ee69a7cfe00cc59689b3ecc986b1bfef99c86b2417de2eafbf5f3e743a. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:46:05Z), 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/US83Z2509782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa86963d5812c1f9c68d013d34fda3255a6e4a8863e0b4bdf01037ca2dcb7cb77. Chain 2 (Bitcoin): anchored in block 958246 (2026-07-16T08:31:09Z), 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/US83Z2516672.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe5ac4312b8f7831a4bfb4aae2aeb4d06bc8d4d98a735e4ed349d4fd79f4cfd74. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T14:47:42Z), 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/US83Z2516673.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa3e684ee69a7cfe00cc59689b3ecc986b1bfef99c86b2417de2eafbf5f3e743a. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US83Z2509782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8828902a5be42df51811370d2321caa7b2cf173f1f475d2870ec1d63910eeb92. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/US83Z2516674.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70643da95dab3baaf84021b14c62ab4c09899fb480bf84d08d7748f4bddfa731. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/US83Z2513098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d12a7c73bb3dab9aac1af46efe5c01ae044a064b2e3165eb1e14e29ce8817ff. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), 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/US83Z2516678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa976e24a756f793cca5e112f0bec59b8a0680fef155a62013f0aa92c99f5dcef. 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/US83Z2516675.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0920035e2f141f739ed19ad6c7414dcaf469d8fb2bf3ca7755f6f025bb9ec6d1. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/US83Z2516676.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90fba997fb5d6089826327997588294cfc1502c5afcf2f82b132828b9441dfa5. 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/US83Z2516677.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe59eec42a5cdb2252f284a46f388f2c7b1dece9f9e3671df999a743caadb20d0. 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/US83Z1918898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87d76a0cab75cf0304a303be37a771d9b6f2f2cb66dabb34971fb5448d32d129. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/US83Z2502680.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x812a14069c8f5b777553d58e8684021b93f381821408e8770874ac2afa3e79a9. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US83Z2402959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6bd161cba14780c3a2f11be9b770357ebcc7797a1a7ecca574c6228d57915fa. 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/US83Z2346440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x309a947e0d718c1219ed3ca155dab7d1bcd16d1ebb483d3eae6c3031009eb118. 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/QMBZ92252782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd207b0b0f53be1a0b231de671a6fd1177c61199b6fbd09a7994a3736c19f06b4. 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/US83Z1933766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x847836c7ae0b945bdfea6afdfa03179dea417141f54ec37254886b9aa65988cd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/US83Z1902014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1359001464f8917a720d7fe283887d4e8b38682d5f11178ef61f14c1cf0e2f11. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/DEBE71600379.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe6ad18c3f15f4e4e11fd3741f51fd0d6bd9fe982905f0723acb07f220ec0de3. 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/ES8741909102.
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