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 0x4dbfc404008112b708c7ebe89da1c1a47ce4e95e8041dacbc3a0ced41de8c865. Chain 2 (Bitcoin): anchored in block 953616 (2026-06-14T08:58:35Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1c083a5c-ad0a-4b20-b027-d3fa29680947.json and https://artists.proofprofile.net/proofs/artist/1c083a5c-ad0a-4b20-b027-d3fa29680947.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
The Fantasticks (The New Off-Broadway Recording)
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 0x39a45766970f6ce9d688f6b13cab01fa13c236c8b39ed1381a104d2f2d6ecb23. 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/USSK30600102.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x518a57c950abca5562c915427d04dd17521ca9fb82eb6db58017683cbcfd141e. Chain 2 (Bitcoin): anchored in block 960179 (2026-07-30T00:39:11Z), 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/USSK30600103.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb92542820cf4347b8711c3a013752001e1e65f99164e24c18ceeda4f99b26e9. 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/USSK30600104.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa08b39e9185ed05d0b28a77af513d7104a426a3d42e494a9781b055e4c50e974. Chain 2 (Bitcoin): anchored in block 960229 (2026-07-30T08:30:10Z), 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/USSK30600105.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26417b58274d99c180c596a23ea0df668abe48784cc74b4c902e3fc3a662ff3a. Chain 2 (Bitcoin): anchored in block 960105 (2026-07-29T12:35:17Z), 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/USSK30600106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb3a7bfc2ed64944ba41c9af7fee915e0ce761a77cb23c9c9a8a2c2962abd8efa. 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/USSK30600107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd324a708009cdf9f6430de53805db718e401aceeb443645d44edf98c34decfa5. Chain 2 (Bitcoin): anchored in block 960160 (2026-07-29T22:48:59Z), 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/USSK30600108.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad390417257750eecd43e932b8f963938f5108db6a26a9f5667f565a29ffa698. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/USSK30600109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde7b1c4e1e7dd93ba8ff55921dc7f064755207c6f464cd126bee1406d3a33f5c. 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/USSK30600110.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb849cbfb43639a9819fc3eeb524de657f68440dca0b0712de8794a4470c53435. 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/USSK30600111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x712990b694e9377992b73692fba7f27b9f81f0a191cee049005674ee5dc5bd9e. 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/USSK30600112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9308c16cbce348ba8f327b63995907030aea1b0bb2afbbaeda3cab2326ce81d8. Chain 2 (Bitcoin): anchored in block 960254 (2026-07-30T12:06:10Z), 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/USSK30600113.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x937843c989cb614643e20c874722a84d1455e1fea3db1ac93f329e71a97825aa. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USSK30600114.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x37b3c69de8abfadc162c232387c89bf2eaa124ccb611206d7496ec43c73ffd39. 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/USSK30600115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a62b7d40b5ffec08d3702cfae28b4d073c0c90c83114a6b49901a173c84518. Chain 2 (Bitcoin): anchored in block 959155 (2026-07-22T16:43:41Z), 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/USSK30600116.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ce5dbc3759b4f6c43fb62b7dcb834c9c263fc3908e10842b09514835780b3d5. Chain 2 (Bitcoin): anchored in block 960317 (2026-07-30T21:35:24Z), 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/USSK30600117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18760876929af9d45432d60b9b77496d88ef432e07e33994586726eb4366d4c9. 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/USSK30600118.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ff57264aff238e71a38b3857352ce01cc30b4ac2b907bc06812adaa964c3f2a. Chain 2 (Bitcoin): anchored in block 960291 (2026-07-30T18:23:33Z), 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/USSK30600119.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6fc141c127faafb75bba64373482a20c006f483d4330021ba29c56007468794b. 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/USSK30600120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe43cd4fa5e2d23c70117c005a7316656ed34bf272efebfb2e7d02b8ba4efb2a9. Chain 2 (Bitcoin): anchored in block 960389 (2026-07-31T10:20:10Z), 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/USSK30600121.