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 0x3917e22b8304f77bfcc02149e065f507ec07ea4bb8b760154467b95377cb71db. Chain 2 (Bitcoin): anchored in block 953648 (2026-06-14T15:20:52Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/42894772-01cb-4aba-8a10-70ea2926967c.json and https://artists.proofprofile.net/proofs/artist/42894772-01cb-4aba-8a10-70ea2926967c.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 0x8c22571c8f20a2d41973e03f85196a0987280291ac66026b980508c5b07804f2. Chain 2 (Bitcoin): anchored in block 958216 (2026-07-16T00:00:34Z), 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/SE5Q52100612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x358ef5d7c3994eaa6e53b0aa575ed7f8ebc3cdd30c2d0b533002ab2b4f2501d5. 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/SE5Q52100609.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc2f3710c0695c1e3bcbfe9c6e30163c8acf2790ba91cb84bf35ace9d2b8d9a77. Chain 2 (Bitcoin): anchored in block 958395 (2026-07-17T10:10:33Z), 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/SE5Q52100613.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0e0cb12ada6fca8dab7449dfd50295f2e493bd21617bb0525018c66acc01adfc. 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/SE5Q52101424.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf43fd45d7895898d363796b2abd5fc3cefc9a1c8c96abf5486106573170579bf. Chain 2 (Bitcoin): anchored in block 958067 (2026-07-14T21:26:15Z), 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/SE5Q52102620.
Tiggarvisa från Malung (Arr. G. Idenstam for Voice, Violin, Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e42890a4efccf6ff789f0ec3e61211f6a1ed57d41a18f90163bfc34e57bf2e9. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAEY1834040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcac706b62299acabb3d92c800ba879602613317fecd80cd5b3c82933bc7fd44d. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/SEAES1068010.
Var hälsad sköna morgonstund (Arr. G. Idenstam for Voice, Violin, Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x86dbdb0794a16d5778e132870022d8047ccc70ac6fe853c03e0410407004cf56. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAEY1834020.
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
In dulci jubilo (Arr. G. Idenstam for Choir & Violin)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x051f24df73c79378729d2934f9a87c143e1e77e93bd79cf5ae4ba1d52d185986. Chain 2 (Bitcoin): anchored in block 960441 (2026-07-31T17:29:52Z), 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/SEAEY1834030.
Polska (Arr. G. Idenstam for Voice, Flute, Violin, Choir & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa632d90c2d1e755bd474f6a5edccfc623efd13d275f79b6fa1fd04a9551c5fc0. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), 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/SEAEY1834050.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x714b3be4348cb8f514a07b145dda7fe64126ff6925d7c10fdc7b58174dcb6f3d. Chain 2 (Bitcoin): anchored in block 960334 (2026-07-31T02:19:15Z), 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/SEAEY1834070.
Nu tändas tusen juleljus (Arr. G. Idenstam for Voice, Violin & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde14ba4d75399da7da75b3ebd13252f826ccb06125f25f1c2a408abc4efc4629. Chain 2 (Bitcoin): anchored in block 960497 (2026-08-01T02:22:04Z), 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/SEAEY1834090.
Staffansvisa (After Bach's BWV Anh. 126) [Arr. G. Idenstam for Voice, Violin, Choir & Organ]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f26f1bdf25b7c6fa79baf8e4bf204eb6ba1a2667201ae2eb7fabf7024cab433. Chain 2 (Bitcoin): anchored in block 960494 (2026-08-01T01:44:32Z), 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/SEAEY1834110.
Julottan (Arr. G. Idenstam for Violin & Organ)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7fb3d1f678cf539638dca21738391a53ee6db2a7baba3921aac06926a684ed31. Chain 2 (Bitcoin): anchored in block 960240 (2026-07-30T09:57:33Z), 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/SEAEY1834160.
Dans forsta snon (Dance of the First Snow)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd31e22eb7f91b2e008e55a606f94cf9947d588cb55775985483896c0db1158ef. Chain 2 (Bitcoin): anchored in block 960463 (2026-07-31T20:42:35Z), 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/SEAES1068040.