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 0xa0d4ccfc45160e601fce285a18accd7e18e7c26769c1d427efabab1acd88778a. Chain 2 (Bitcoin): anchored in block 953778 (2026-06-15T11:57:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a4ebb259-25b4-4831-9522-084fecee189c.json and https://artists.proofprofile.net/proofs/artist/a4ebb259-25b4-4831-9522-084fecee189c.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 0xb8cf79bdf6656422573251d6cff384657d50b2c31dc7dbbabfb990459b84bea6. 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/QMDA61814105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2162b80d5dbb7740ed639b8a6f7dbe3ac6c589c095a4652269a39a3af62ea12a. 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/QMDA61814106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c2e78dbdad1785f1975dc276b273a96c30f405503848445690c4293ffd7de2a. 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/QMDA61814107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd216be57e8a8b19d92db5e284466c3595e086ae065525dd57ed1fa8cd6d5fabd. Chain 2 (Bitcoin): anchored in block 960166 (2026-07-29T23:39:29Z), 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/QMDA61814108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91a64c26133fa7cdd669e4c11c405fa04f8ca6bc8addf04956d28c4c44e99ceb. Chain 2 (Bitcoin): anchored in block 960193 (2026-07-30T02:05:19Z), 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/QMDA61814109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07b8bd260969dcb6565d48ee4dfa89c8c957cef18a666c19e1f083adff20ae0d. Chain 2 (Bitcoin): anchored in block 960220 (2026-07-30T07:28:30Z), 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/QMDA61814110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xecc78acf128d67da8b3950b8931907d8e1b4b9be7322b8a9d2f5af8a1e68bf09. 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/QMDA61814111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x325a7e6b9a898ebe05add97abd249cb529f4f5dc2ec11e14fb21c9f2dc84a831. 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/QMDA61814112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d538e48c76e6c9a957fd99fee023f73674a7616934e7fde8fef25fc140efbab. Chain 2 (Bitcoin): anchored in block 960216 (2026-07-30T06:39:12Z), 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/QMDA61814113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48d2014666c54418d5010387c6bbd71c42fd8e8f85471014c5bc6dd56bc4335f. Chain 2 (Bitcoin): anchored in block 960223 (2026-07-30T07:51:46Z), 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/QMDA61814114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9a3cc5591a3236b362aeefc4bd46fb1eb41afca639d4e40ac1470780abaf8ee8. 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/QMDA61814115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1d641214ffe0a2ffd9b91d196f1d1c0a262ee1095c5128291990322cff244abe. Chain 2 (Bitcoin): anchored in block 960296 (2026-07-30T19:11:09Z), 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/QMDA61814116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b20f5f19b7c3a3eea91128aafd91058a65f86787c5c38ce4a79f75c734d6067. 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/QMDA61839224.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60cb4ae51c5773a0489ef41570d810f9b09506c6eab6ed223b5bd66a5ace6ad4. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QMDA61839225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0f8d4827f4f4513c953611fb3cd0daf430f444b55fcc76148d7902bb2b91cce. Chain 2 (Bitcoin): anchored in block 960509 (2026-08-01T04:30:37Z), 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/QMDA61839226.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc68c88c135b6db95bb3e034b809a303bfd2ce11eea53169b8c4837c5e7c3b843. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/QMDA61839227.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c26ffd1ca10f6ad421b2dcafe592da6f8cff97426ec8fe9cf808f78cdc02454. 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/QMDA61839228.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97a6ce0b8f3676c63cae4ffc67fe92c75ba3a47350f7945c57bae75ac1cdb296. 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/QMDA61839229.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9338c5a1a888217c70b9196cf1b29317878982b3b9f0514fe998d96206a38de4. 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/USDRS1103601.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbb6f1fc4a8164fbcb418f4939a05e3ff5588697d93d26ce2a5f4533572946d38. 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/USDRS1103602.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e9d2d035738b163124ccbc9ce893a42a459ee2ddc8bef5dd2264334159d5d70. 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/USDRS1103603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8496cfaa6086e706e327644ec78bff27964bb53de6499a189046ff026a363d00. 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/USDRS1103604.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5141256919e30bb602ec770b2ec9e62963030dee9c9235efad5b137fed817f86. 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/USDRS1103605.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9cf27171f04580ff9b98db70a3fd605c9a1e5078091d8217ddbddeb4fb7e0d. 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/USDRS1103606.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc78184db0f044d6adb35cc0faea13fde47fca4de36287e8a2ee851bfb9f72c48. 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/QMDA61830660.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ae10a35500a8f4bca811145f67550be3628a7eefd12e059a75f27e09a61219. 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/QMDA61830661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb2a612bb97e5917d79f9a5fce38b798ef2df369ea38513f650ebc3b449d39ee. 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/QMDA61830662.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a32a9da9625ce61323c3f5f9c9e7e10ca8d11ad247aca09560dd75b07c1ff36. 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/QMDA61830663.