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 0x851153dd284ef46b8e58b289991e23d23f4ebcfc8527f40c206007c6d13e1785. 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/76606b56-288c-4c2d-976c-73e231b2809c.json and https://artists.proofprofile.net/proofs/artist/76606b56-288c-4c2d-976c-73e231b2809c.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 0x2e25b779f174b2cc99d7ff0c760777660df88e975b2de9dea682533181b7b482. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/FINDN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97e70fd2ff5d6b93973d87ea0692c2fc96e1b4e7551b766078740c292035221f. 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/FINDN2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x493020b1e0b9e97254cef40b15b6d4ec36627f7d35c1ce212467bd464a375484. 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/FINDN2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1baae87e7b49d951872155ed73e2dea423b4cd0de6e23109ca4b2a6937438532. 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/FINDN2100003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25238cf34713bbc1f98a33c19fe1c525f9bf6e046b042bb10fc37b657ff3412d. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/FINDN2100004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2e25b779f174b2cc99d7ff0c760777660df88e975b2de9dea682533181b7b482. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T06:09:33Z), 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/FINDN2100005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5f8426465db3cde356a2d1dae805d4aa26d1efdf61f09861659701ab092149e. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), 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/FINDN2100006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0ded2217d00bc14bda0f23c8cbdebb3ee7d893f9ec58cca07a3b50e6e699fdc. 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/FINDN2100007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe53d1bcdc0d6289c2719e6b9c04b3118a184ab3907a0ef6a1b5941aa105e42d8. Chain 2 (Bitcoin): anchored in block 958991 (2026-07-21T10:04:40Z), 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/FINDN2100008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df89bb363749f5e3f66849f8f995ac42ebf9117f45bc3486029bca705765d3. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/ITG272400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb406973773a1f56bb6ee69fe8d7781b88420a8f53256855131ac472bfd6569. Chain 2 (Bitcoin): anchored in block 958373 (2026-07-17T08:41:06Z), 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/ITG272400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55df89bb363749f5e3f66849f8f995ac42ebf9117f45bc3486029bca705765d3. Chain 2 (Bitcoin): anchored in block 956742 (2026-07-05T05:07:15Z), 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/ITG272400870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83c322084bfc2a7ee50fa70f2578e95d8b2cfea80901601c4f0c28d8fc5ff019. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/ITG272400871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdcb406973773a1f56bb6ee69fe8d7781b88420a8f53256855131ac472bfd6569. Chain 2 (Bitcoin): anchored in block 958095 (2026-07-15T04:30:08Z), 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/ITG272400873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ec19d1d52f6b7f250dcaf46e0a8b733bfb03446de5262529f9623320ffb1618. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/ITG272400874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4d28ab7b00b8f5eadbb5fc7ba779ee80fac99519c9f56d9e57398574ccbc8157. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/ITG272400875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xafaf58a62e21e1d660afdb2ef5c87aab31c1f34e51249e4126892e4eea1aa0f8. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:16:49Z), 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/ITG272400876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa1b91a82371d6ac5164c57c2fdf5bcb90c1d9a3d3cd30a71c21abf00aea419. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/ITG272400877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e4feb5406072952f9e95a9af8a1ae9eb6e4c85ccaf48b0eaa9eb95ea3298ba1. Chain 2 (Bitcoin): anchored in block 958749 (2026-07-19T18:38:10Z), 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/ITG272400878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b952155bde334bd16e61c8eaf191f4fa88d79e9a2487e147af8e7d812df1d8a. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/ITG272400879.