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 0xf4f2d1d421d3c8f2f0de2343dee1406ce9f91d9d4d569894cf80e72c1909f73d. Chain 2 (Bitcoin): anchored in block 953791 (2026-06-15T13:40:30Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/dd6c6828-93b4-466d-aba9-85058d942639.json and https://artists.proofprofile.net/proofs/artist/dd6c6828-93b4-466d-aba9-85058d942639.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 0x2d4cb842fe50797b3644cc31c5d520825ddcbbac001c5c554e0eedcf59893b84. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/USJ3V2014569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xabc5b11f6840faae861a1e132f72c093c2046da0c0d7ab1d169c6f02d4375da9. 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/USJ3V2014570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fd1a105ae022be0b9f13f1232349b6af4dfaeea43133b4acbf5234d6b2293cb. 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/USJ3V2014571.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfef54c48d02328d47076ce5317a28f05a721bb47a62b2406c1f50f8811a1b8c6. 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/USJ3V2014572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb7491ac2dd05462feebfeedb9c0117138a9074ac03fbd85077d6448a8a7e5dc. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/USJ3V2014573.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ca63c2650c43e5c51ee81e833ad525327e5611dadf37a400c50549a19770849. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/USJ3V2014574.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe15106a36ca541e96db2c19449f8710fe265f4528c1e8857cf46f268c760393f. Chain 2 (Bitcoin): anchored in block 960302 (2026-07-30T20:09:33Z), 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/USJ3V2014575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32ce91cab1415ce52ccba6fd6f913f12dcf671ec72e00dbf45ee8f64775b007. 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/USJ3V2014576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x087ed33317ee006cbf48270af34763110c1c9f7640571cb67a56fbcb814d4b27. 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/USJ3V2014577.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0e2ec90e589ea75835f2827df986af4cc54b3511631ef00e2940469d56bdf15. Chain 2 (Bitcoin): anchored in block 960258 (2026-07-30T12:45:34Z), 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/USJ3V2014578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfc0bdbf68bd380c2bceaccfabb907f27a370755b3384d3511cee2f7312ba4d6e. 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/USJ3V2014579.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x22573d246da79ba8f910d40e4232ed388a3482b29c14ae0d4e59c1bd3f99aa7d. 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/US7VG1751173.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28f3ce8980b3082007c30c458f978c1c9c925b434b78a41d0b6d48050c98f90c. 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/US7VG1751174.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a2b4221dcbb85368ae1e515f13584ea2db39e9ba0ac675b004fb6b866fb3fdd. 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/US7VG1751175.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb8dec2fa9120ce8c5e045e04771a3f579ffb4b3504fc664815569cdeecf9337c. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/US7VG1751176.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5ae2fa6f664e1c6e1d092c12cb10c2be4c87a2c235696fb4ed9d6c0b3a3ffa8. 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/US7VG1751177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d50e64ce85f509f012d3b3f92e3b194ca16525471186a57797cf659b00cf2b2. 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/US7VG1751178.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e9b9a644c711ae9fdbbfe615c69c0cb1db3b62970769f43f43c36ba5f9957da. 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/US7VG1751179.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x167022cc87a27686587bf170103277e73d50c268b8aa02e7c53fc7ba05e25ae8. 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/US7VG1751180.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe80110180a5d7313f1ba916fbd6be8d598fa16e1aecf0d2349e43cc6abd9b67e. 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/US7VG1751181.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee5d792340c96b7aacf02bc1e702590f29ddaa271ef69f104745e90009028b04. 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/US7VG1751182.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2babe9e3a6a9803bae7e6969fb0898230e9610d1c6fb7f52f5e96c863f124. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/BCKFO2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e39171e3d966f0c6bed0f655f5171e113175ee16a13918a3582db818ce08087. 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/BKIGW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed32788d623499a13f309d21a8b190db8f85d06c8f90adc59a8b1bca878e503. 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/BKIGW2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d5732893ed43476e6b1cf4965ff5095d75ea8f056c453da4f8d1a6703fba628. 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/BKIGW2300009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfed32788d623499a13f309d21a8b190db8f85d06c8f90adc59a8b1bca878e503. 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/BKIGW2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e39171e3d966f0c6bed0f655f5171e113175ee16a13918a3582db818ce08087. 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/BKIGW2300007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x59e2babe9e3a6a9803bae7e6969fb0898230e9610d1c6fb7f52f5e96c863f124. 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/BCKFO2300003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80d4ac231c60393ac45f1db6f6f9c2d4d1dab31a5cf12ac749273e43e0f714b4. 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/BRFBP1800002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742257b62b88f8e4ce74297ef1816e0e33478dbecd37d97861cc27ba42dd4c3e. 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/BRFBP1800004.