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 0x01b32c1cd04373a2de8e431355e9d135f4939b29b2dd089bb41e5c4fdf6d9989. 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/5ed2d644-1b8f-4539-8409-eea4ad161432.json and https://artists.proofprofile.net/proofs/artist/5ed2d644-1b8f-4539-8409-eea4ad161432.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 0x2b2efd801d0d4eadc3e63a70e2b030725d065f4451f35bb8e586dee7445c2a09. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QMANG2285131.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313647ff567be8abd2a26c6462b1b2d29bafa69734d972b2143bd33dcc20286d. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:09:12Z), 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/US7VG2495849.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb2d9efd9a91afd2388f3de933be85ab2b26a8defb5e95ac08855e4745edaf05f. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T16:21:50Z), 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/BC3PG2400459.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9fcdd5356f367dac08da1184abeb4d70c7fe61e7460ad98a21f90041bac3d08. Chain 2 (Bitcoin): anchored in block 958420 (2026-07-17T13:33:01Z), 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/US7VG2495808.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa7bed40df76878d9d98cce2aa8984e44e71d1ab4b0d83f78afe9525fe7f6a78c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/US7VG2495807.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd0f5117d3c33de1debf212e9603de2ff0eb41c86cc0d56d5f33c42345ed2b947. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/QZGLS2463526.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa54195e038aa94ba1f64f2216586206501df169c896649e47895ba5379303afa. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/QZNJW2446933.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7058f360d6db54a90f5d1566710bb0743f51e7794bb704f0ebb435d4c17b97a3. Chain 2 (Bitcoin): anchored in block 958121 (2026-07-15T08:02:12Z), 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/QZNJY2467108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4f6cde928023cf3890b2688c297e168aab2ebe0a17fc3316ed1323b41522365. Chain 2 (Bitcoin): anchored in block 958366 (2026-07-17T04:59:09Z), 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/QZNJY2467109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26cb2b8fb618f4280547e3dff2cc77225f7c74ec6c122e876fce023ba62b079b. 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/QZTVM2489876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8f38aa7e1f2505364a90c136af42cf1683c0e395651eb294e0aa64c19487ef9. 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/US7VG2522257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c398a5412c0c447c234a761f499602dade82b6e2f23da11d9d42c2267d46b7f. 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/US7VG2591907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44451bb3b55683ae7acfecab226a1d5d5e44d582112554f768f7319179455b84. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/US7VG2584678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc46c944c39d783647feb654f9816c9febaf3fc2e47ffbece84b5fb76fb3f3b. 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/QZGLM2514998.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e9a70f7aa02fb94e91c342879078bd8c13fe81d78486196d83f4a0d84e8477a. Chain 2 (Bitcoin): anchored in block 958202 (2026-07-15T21:23:21Z), 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/QZGLM2533685.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69c86d03c20791413ce40b71a170b15418ea16f11e53c9f99edcceac3513b065. Chain 2 (Bitcoin): anchored in block 958514 (2026-07-18T06:54:37Z), 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/QZGLM2581842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27a795d9dee45449b100ed1f796d63eda74a8441dcec8e31a74cec3ce11edb6d. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:41:24Z), 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/QZMZ92568615.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4566e39f7696c3be0dffd0ef8d65c9ab6267a332deb6391aabe49e039bce42a7. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T21:44:34Z), 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/QZNJV2593081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa78a201c716444c922a607f97d4b8a399486f95d0ea524cb6ed0c111cc42ee4e. 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/QZNJV2559627.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6cfce25dab74e77766b9ce9959577738fbe7a37a82b868bd6081d9544c7ce123. 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/QZNJV2597678.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdd1f57f7f5a1a2382804355dbb29b440d267034c7cc67417a2715002b20b3398. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T02:53:57Z), 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/QZNJW2592420.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3052d6dbec37e28179a024af43c9d502195eba99e100985f95f13ef6343cd642. 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/QZNJY2504200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7322a8a2e7531b2407adc7be15a22f1ae6b3d0bde3b2d8c5f3507ea009446c21. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T17:34:35Z), 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/QZNJZ2519840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8737a60cbbf4211ee955169bc57d1d4da3a86f8eb87333372cb3df3f82819449. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/QZTVM2516363.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdae00c4812287437ba453de9ddee4d4e09607ef18a14284ec72f4e1305175c90. 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/QZNJY2382567.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3e86d1b6480f04a7ebbd57441021653396be2aeb8f519e3f63cd8f88b04ac7a. 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/QZW9K2474348.