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 0x35db9903796f265ac6ac2445e31a024287d8652633287f4e04e6e2ecd6bf50b4. Chain 2 (Bitcoin): anchored in block 954066 (2026-06-17T08:11:48Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/62906ca5-c409-4d62-8c04-aa85b9d37f13.json and https://artists.proofprofile.net/proofs/artist/62906ca5-c409-4d62-8c04-aa85b9d37f13.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Maria durch ein Dornwald ging (Arr. for Voice and Chamber Ensemble by Rebecca Scout Nelson)
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 0x9057d658bea00fbc18213e9ea54f41aa528e2c6d6b3e3988d866d0b55c530992. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZQGV2100011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8b3fa50c590c6fd1318011872ef01f75e076cab0b127518cf8920a15b3624bc. Chain 2 (Bitcoin): anchored in block 960300 (2026-07-30T19:42:40Z), 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/QZQGV2100012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x956ac2af048ce3f5dfe357efbbeec1ff681a233cf95480b737e62723f1e6792b. Chain 2 (Bitcoin): anchored in block 960468 (2026-07-31T21:25:57Z), 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/QZQGV2100013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x33cdd1c0fb65824e4a4296c0a64d9be2423208342789814cf3cb456d297eb95f. 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/QZQGV2100014.
Je voudrois bien, ô Cloris (Arr. for Voice and Chamber Ensemble by Rebecca Scout Nelson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9722baa4da6ff283bea29671793d05b86103879cedeb891ba22876ca26d22ca. Chain 2 (Bitcoin): anchored in block 960360 (2026-07-31T06:42:11Z), 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/QZQGV2100015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1adaa4f040973d70864c96722199e81d973284997b91aa3e6e643557930b0e9a. 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/QZQGV2100016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x986bbbb15c14133ca8ee193313dd0abe77d9b0494cdeac09a7bc97d475541220. 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/QZQGV2100017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x550617c6b62a838bd8547c8e4401cea84c70ad65e2106ab3c92af486f42b9cb9. Chain 2 (Bitcoin): anchored in block 960489 (2026-08-01T00:40:43Z), 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/QZQGV2100018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc92463703b4d3961e0d19f55ff01b93d23a7b5df58e7ef638574dc9c61bc1b2a. 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/QZQGV2100019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa2cd24a1ee112f78cb734eede5468cef2494981dec913c4047c72fef1cd819b0. Chain 2 (Bitcoin): anchored in block 960344 (2026-07-31T04:14:58Z), 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/QZQGV2100020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eaf14e57bb001fcd3767924229f5ac6e07b4708c8104391b3dd02d520d5de2f. Chain 2 (Bitcoin): anchored in block 960397 (2026-07-31T12:24:41Z), 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/QZQGV2100021.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x579c777149c989c32b1fd85a5b5567afbb3f07d0a62c0038f9b3b8c051854936. 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/QZQGV2100022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0918bb8447104f31fe2ea4b225e91b79d1ebaf83dd786f922dfc8788ae91c394. Chain 2 (Bitcoin): anchored in block 960500 (2026-08-01T03:13:03Z), 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/QZQGV2100023.
How Blest Are Shepherds (Arr. for Voice and Chamber Ensemble by Rebecca Scout Nelson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x217eb08afa23554a4dba31eddfcedb49022d21c8637c403ed2b42f6b541e9a5b. Chain 2 (Bitcoin): anchored in block 960284 (2026-07-30T17:23:26Z), 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/QZQGV2100024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a7052f61d83957fb462a598bafeec1a1d5cdd920d89f64b92cb7e62e95714e7. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/QZQGV2100025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5c629f1c184171a5080c2c8b9c81aa426e75110738214d90ec971f7a4dc32d19. Chain 2 (Bitcoin): anchored in block 960410 (2026-07-31T13:50:38Z), 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/QZQGV2100026.
Gli ochi toi m'accese'l core (Arr. for Voice and Chamber Ensemble by Rebecca Scout Nelson)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc90fe32a2991d7dbb955f54d9cbfd5ae9bc7cb68ce6ec0402a109ffe56efb9dd. Chain 2 (Bitcoin): anchored in block 960403 (2026-07-31T13:04:34Z), 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/QZQGV2100027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd9d73113922f47c34491807bb1dda74c88191ea951d03f24f8ce7841a128e633. Chain 2 (Bitcoin): anchored in block 960330 (2026-07-31T00:58:21Z), 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/QZQGV2100028.