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 0xcd93266f8346319fa1d3152cdf1a72568f88e2da0262b200436a5fce69ba351a. 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/9f8ebb9c-8d73-48e3-bcbb-0f734d6969a7.json and https://artists.proofprofile.net/proofs/artist/9f8ebb9c-8d73-48e3-bcbb-0f734d6969a7.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 0x52ecc456a6310a6c0e8c0c9a91717962fbe00e904887fd6617d3417ae2abc9fe. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QZTAT2173764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b2b2cfb4e4d2046c9566a18deafaeebca05a9773ca7ebaaf3a7ef62687518ef. Chain 2 (Bitcoin): anchored in block 957647 (2026-07-12T03:57:41Z), 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/QZHN92148282.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x99c8b8d56a8ab1fde8cafc39aba84afbf1b0bb76c3ed5e34295a247cb4cf7604. 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/QZHN92148285.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb23e0178ab236291da31dbb068d0fc2d902e472eb7497d2d60493021631fc0c6. 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/QZHN92148287.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4396995c14bda51fc8900378290238d3bf1f229bf1a3fbcf30d3590c0eace3f8. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN92148292.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72066078acfb148a1dea549cc8d85747be45da265d30caab96e7a877e539211d. 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/QZHN92148294.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0dbff108989fffe15350364ac93e5d62e0ddfaedfaa5441ada2b56a122720ac0. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZHN92120700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbfa605664337a7270e41b8844eb05e047a10a9f361f5df9d43ad14d023243788. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-15T23:24:33Z), 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/QZHN92120691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xea65a0c10244c9d6d6507855ec1a0a578da0f48fcd329c5d00ea3dd46b1bcfa5. Chain 2 (Bitcoin): anchored in block 958775 (2026-07-19T20:13:58Z), 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/QZHN92120719.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef0249ec3430d356b637cebd36086b9fefcd7a7c0379cd16abedef238b1c7d04. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/QZWFL2444690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f13c2e04b9a89ff6f7895aa07c857dc5edcd8c63c3d8b16d3ee280783ab6049. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/QZWFL2444691.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1302cefe04db3b8a782027402643e62db518c7e084884c5e3d45a78b2187456. Chain 2 (Bitcoin): anchored in block 958653 (2026-07-19T03:54:23Z), 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/QZWFL2444692.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c8643c3794ff642fcab3f7ba4d6b2625c085d90bffd9e69a6b495638572e9ca. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFL2444694.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x82e8a4f24a70d22dc0139a279491e869ad115146db09d5e00eeda29b34f369bf. Chain 2 (Bitcoin): anchored in block 959118 (2026-07-22T10:01:58Z), 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/QZWFL2444695.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc876442ff0b096f45c128711b37e9d14b3e6238b774362d80e3ae296a182c0d2. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/QZWFL2444696.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d01249f2cc51d2594b994422e8d1847001b68a6a635a68a671701dd33e5737f. Chain 2 (Bitcoin): anchored in block 959087 (2026-07-22T02:05:55Z), 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/QZWFL2444697.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb7f81e89199bb36e82472eb0cdfa049aba9e8f334c6fc2fa44ac435f8e7e37e. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFL2444699.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x526fd461baf0f14724365c44c620dea94355ebd473660f8167fb42382e0f9d28. 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/QZWFL2444700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x475f338a2d54b8a02dea3dc730945684a0687ba68825fff7627e9364c270fc69. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/QZWFL2444701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1cfaf46a4e3d8591a471c5147c6bab772ea24b12eff61582602f74ea5f57c963. Chain 2 (Bitcoin): anchored in block 958805 (2026-07-20T02:22:58Z), 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/QZWFL2444702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x119756f11681e6f5454b8f1b7fd7eabf9cecac91474dbeeef5adf682eb90ac9d. 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/QZWFL2444703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x12ab7278d3a436b2ac9fc9ab5c00951a152f03befaa3f764553efbd2c595ab45. Chain 2 (Bitcoin): anchored in block 958703 (2026-07-19T08:36:12Z), 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/QZWFL2444704.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38724c14ddb0d2dfb1ef7dd29c0e9b7a48d74c650044e0b439f13ca6409ee8f2. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T06:33:30Z), 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/QZWFL2444708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c3cfeb5d74a2ddedb9190d501465de8286c38858e8fa23fac535d87bd20180a. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T07:19:23Z), 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/QZWFJ2569238.