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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a059d939f4b465993d8d23406a7a61a8979f9eb76b9d832b38a60eba7ff8206. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ef57056b-e3e7-499c-a5ae-708f93f0eaa1.json and https://artists.proofprofile.net/proofs/artist/ef57056b-e3e7-499c-a5ae-708f93f0eaa1.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
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50a49c532911bf95e06da7222ace246e5f11dbe864ca4e2fc205aff07842cda6. 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/USHM21658645.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c9065ed725f1394bd0376f59381ef15b41abcbce838c42385ebb74f4c746adf. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USJ3V1329809.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x512c9322d773d8c8caed82d336be4c6e5ce862a49afafefd86ecaaed08a7b2db. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/USJ3V1329811.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8c8e0010a2300c422fa497d0e63a0a19225b8e4b731c64f5c186cfed02e1ec50. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/USJ3V1329813.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x593c26bdd66b94df3b052feada56334ea366515a28442b3f2b229391616b078c. 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/USJ3V1329815.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1496e04bdb36c043935ef59824965161bbd265bf13f531d9d114f5b62c9db01e. Chain 2 (Bitcoin): anchored in block 958335 (2026-07-16T22:37:47Z), 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/USJ3V1329817.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c50534bdf60afeda47b9844c01dccc32136dd705c780928ccdfabfb8daccae5. Chain 2 (Bitcoin): anchored in block 958383 (2026-07-17T08:20:01Z), 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/USJ3V1329818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x04eb808b7447f98110fd1b84d0595172b04c1061e39558b88779f021ba799c25. 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/USCGJ1714840.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ef3403ee1fbccb01e005a048b75c90c17f26257399046159f7107f6219473ae. Chain 2 (Bitcoin): anchored in block 959089 (2026-07-22T02:17:57Z), 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/USCGJ1714841.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91e5052cd687916e88eb3a46ec6638f106226bfe4b974f5c61e37926d2b3315c. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/USCGJ1714842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe6b453bce30fb3faf4b433aa34d59e0f7115549c72bb0ad72faab4befbe2cb52. 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/USCGJ1714846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52a01b8d1894e81374af50e0b1f87abc2404884a357ceb39d15f0ab0dbbc31c4. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/USCGJ1714848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74f1b70f5a2f5fd7a79f658b10abbca3f8632df8050da2878b8da6157e2d66ce. Chain 2 (Bitcoin): anchored in block 958474 (2026-07-18T00:59:09Z), 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/QZTB72451724.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068e0a4badd5b4242c31178c1aaffd67d7dcf0f9a864a8e0d01a1f9c4178f66b. Chain 2 (Bitcoin): anchored in block 958689 (2026-07-19T07:11:11Z), 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/QZTB72451726.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x429d08373b20b93f1dda8755e24b10903091440444184511c2107dfda8238271. 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/QZTB72451729.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf891961f2f4f83695f84feea266cc7fb2ab2128b564fa66942c0f8421d75d3ce. 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/USJ3V1869491.
Yossi Green: Zemiros Shabbos with Reb Berish Vishever
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f17af10e9b7ead32d4417b1bf7924e6cbb496c33c0dc26a504a96e22db9db4f. Chain 2 (Bitcoin): anchored in block 957075 (2026-07-07T18:50:38Z), 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/QZPLS2229237.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8745f873b363705048d7c23566e76aba7b8dbd06967cd96c214bee7575442a4e. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/QZNWU2281763.
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