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 0x96269914af901c7a298f144eb710c9421e873b515f0e61bb5112a50fa3c47d2e. 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/ea7fba13-6e04-4271-9cfe-13fb254d4e1c.json and https://artists.proofprofile.net/proofs/artist/ea7fba13-6e04-4271-9cfe-13fb254d4e1c.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 0x0036e73247e1d7745b4cf05d4ebf01b195bfff27eb29255f8ec003508ecf2063. Chain 2 (Bitcoin): anchored in block 957650 (2026-07-12T04:18:57Z), 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/USHM81065870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xae2ca460d350b7b9ba8a0a06b2628d8d90ec923615eff09bab5897a02d5073d8. Chain 2 (Bitcoin): anchored in block 958166 (2026-07-15T15:55:19Z), 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/USHM81065871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0de257509f4e365274e206d75b91c54f043da46c5798b23aa113e45900dd49bd. 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/USHM81065872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c2995995743f0df162de3d4d1c42c9f8746c0dd0f0dc14c2625d75daa07bd5. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/USHM81065873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5045fc3eff846c3be0def22df151cab277234680e95299063ca5d517a8d5d72a. Chain 2 (Bitcoin): anchored in block 956396 (2026-07-02T21:01:51Z), 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/USHM81065875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcde8cb8e6c0c5cfc9261ee5923194a3ffa0a26ffb38a4a55870f39301309ebc4. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM81065876.
Together - The Friday Night Shabbat Sing-A-Long
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e01033df969e631bb459a171abb2785bb27645a39c69a4b7f0f6ab37f9dcf1d. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), 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/USHM81066822.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76274bb71033c502285a07fef58eed8c169afbca59d2d06182c8c93a72f4a9f4. Chain 2 (Bitcoin): anchored in block 958401 (2026-07-17T11:10:25Z), 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/USHM81062759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b65d7b316f9014d64060b33db534e30df83a9cfcd0a731f55e509a15977a2cb. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM81062760.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b8df7c1562b53b868733ab2e620c8e4030e0dfb57176dc462c16ef2ce3da3a2. Chain 2 (Bitcoin): anchored in block 958163 (2026-07-15T14:38:07Z), 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/USHM81062763.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57f4f10e66bc1ba03ec42b8e79d918ddff0d64172419d954c86292737f49ef94. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USHM81062764.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa343e3cc39fa2e216906abefa8ae38f1de3085d8a144c61fb198a07d44bdf6df. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/USHM81062765.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbac97299231d66aa8d89387f95c5e9f1326546199351bd17907c8b176c42926. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM81062766.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x242145f8f498ec86c99a30714b2ed2c37b0887f36fbe9d10ea8e41f4a6bbee3e. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/USHM81062767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2dc910d1940907b4ee1e4fec3a5ce0568a5f50b2eb08ffd3c4c075c939882e6. Chain 2 (Bitcoin): anchored in block 959023 (2026-07-21T15:22:58Z), 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/USHM81062768.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1386d4649b804baf0050dc4f7f72f6f8ca611bf4baffca15e9fb474c1650a551. 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/USHM81062769.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdefaabb0abef79e62c241cff912b8893a400b92531a2711d8dc70d89e078b4d9. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/USHM81062773.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ef5894fafc07f9c7a3b4a1a244d6404aa9c436215c75e244eac42880d69d040. Chain 2 (Bitcoin): anchored in block 959137 (2026-07-22T14:03:35Z), 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/USHM81062774.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1906948aaf0c4902facfd22ec5521180ea22096fbf2d3f51ee1aa1ff67c6a10c. 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/USHM81062197.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55bea8437e6130375bf69e237923ad109a0e7a0ec80943dc0210d50f64ee715f. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), 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/USHM81062207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5cda45ecc8c72947adf436f495f5c20a41f419b81effde6bd19884a098bb838. 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/USHM81062214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8042f4f565cd3fa4905371f2a3cf55bead7e33c87342a48807c2b1f5f00b37c. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM81062218.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x729e2f863d8f304f973ec9723787464c1d64469e62906b7931d3ebd778af746a. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/USHM81062225.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3fc9241afb293c067c6732011aecedb2e734d602ef1b6a9869d28545831cb855. Chain 2 (Bitcoin): anchored in block 959100 (2026-07-22T05:29:55Z), 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/USHM81062230.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc24e855026ae4362405e11f182f2b1e9cbf6cf7400bf2b514e94f4d0bfea6039. 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/USHM81062233.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf47aeafddfc96da022f8c8104c53ff8a404268fd5ae68b3941b8c5f1f60daef3. Chain 2 (Bitcoin): anchored in block 957658 (2026-07-12T05:03:28Z), 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/USHM81062234.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5e8f15da55a1de7979b036eefaf0c46789a75dfb79c57b8227b375b4176f604. 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/USHM81062235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3978b71de56a6b6090df8b1acde997402eee274d66babe6eef55af0fa65bedc. 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/USHM81062236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef1032fd10b782facc44ba119c2847d2121cb69cbbf8a3919365affa19d632fb. 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/USHM81062362.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7330b97d85d5d229160b9c7fc7a8d72c009d3fa27db95100988f3fddcd830757. 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/USHM81062367.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b790bb996386693c8719e048f015f51069abc01a3e05441356fbd379961925e. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USHM81062369.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23d5b3795da1ee87a6120f84ac2f8380f8368a38b337801aaee5d1ea0481b37d. Chain 2 (Bitcoin): anchored in block 958552 (2026-07-18T13:15:29Z), 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/USHM81065279.
Vintage Cantorials for the High Holidays
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3bab165f15a2568caf6cd3dfccf8df1023307cfe119ad772d34e35ab4afcacea. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/USHM81065306.
Cantorial Classics: The Classic Sounds of Shabbat, Vol. 1