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 0x520c0c63f2bea5879b6eefc3c37b2e2d96d429eedb1943f0fd1f02740f405b07. 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/5b274dbb-96ca-4b22-a3c2-fdf0cc35f240.json and https://artists.proofprofile.net/proofs/artist/5b274dbb-96ca-4b22-a3c2-fdf0cc35f240.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
12 Melodies, Op. 33, No. 9. Ved Rondane (At Rondane): 12 Songs, Op. 33: No. 9, Ved Rondane [At Rondane] [arr. For choir]
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 0x124b2b4dd32fd34363408ee3a6c129354f1efe9aaa746698733fe36c4cba6628. 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/SEAEQ0761010.
Romancer, Op. 39: 6 Songs, Op. 39: No. 5, Ved en ung hustrus bare (At the Grave of a Young Wife) [arr. For choir] [Version for choir]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe0a76e21e0a94303ca691d2be896d2e2c0c53fb61031e1baa1ebe8712bc87705. 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/SEAEQ0761030.
Ave, maris stella, EG 150 (Arr. For choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b71f51c45ecdf15a1a4ec05e5f71865fc849461327beee4f8749a7310522600. 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/SEAEQ0761040.
12 Songs, Op. 33: No. 2. Våren (Arr. for Choir)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5cb24943dad0d69a720c16eff2e1c31677bcef9512de8b579bd5df37d46116ed. 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/SEAEQ0761080.
4 Psalms, Op. 74: No. 4, I Himmelen (In Heaven above)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1925079fa781b68aa5ce2e39400282207da98e77288453398456e3809354ec5c. Chain 2 (Bitcoin): anchored in block 957048 (2026-07-07T14:18:56Z), 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/SEAEQ0761100.
4 Psalms, Op. 74: No. 1, Hvad est du dog skjon (How Fair Is Thy Face)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcc4ca90bba30503dd1213440511dbcbe7a54adede98e6308ef498239cfe2a59e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/SEAEQ0761130.
Album for Male Voices, Op. 30: Album for mandssang (Album for Male Voices), Op. 30: No. 1, Jeg lagde mig sa sildig [I Lay Down so Late]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa036ee1d48b285326a69c44c22db92f7130cbbad68314993522cd7fb72d64c2c. Chain 2 (Bitcoin): anchored in block 960448 (2026-07-31T18:48:12Z), 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/SEAEQ0761020.
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
Romancer, Op. 15, No. 1. Margretes vuggesang (Margaret's Cradle Song): 4 Songs, Op. 15: No. 1, Margretes vuggesang [Margaret's Cradle Song] [arr. For choir]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7a89d8956a56bb9c47a64e05c10c58114adf1761f52819b08cb8ff552d0a01c. Chain 2 (Bitcoin): anchored in block 960352 (2026-07-31T05:48:30Z), 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/SEAEQ0761050.
Barnlige Sange (Children's Songs), Op. 61 [text by N. Rolfsen]: Barnlige Sange [Children's Songs], Op. 61: No. 5, Kveldssang for Blakken [Goodnight Song for Dobbin]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ffe0d733372a516358f781d06824884324f714822f4baab669269e7b3ac5e4d. Chain 2 (Bitcoin): anchored in block 960435 (2026-07-31T16:33:26Z), 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/SEAEQ0761060.
Landkjenning (Land-Sighting), Op. 31: Landkjending [Land-Sighting], Op. 31
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x46d8a7f403727426d3534de2fc8b3bc469bcc6bbb62db1d7cc2de912f94b8fde. Chain 2 (Bitcoin): anchored in block 960276 (2026-07-30T16:01:17Z), 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/SEAEQ0761070.
I Folketone (In the Folk Style) [based on Lyric Pieces, Book 10, Op. 71: No. 1, Once Upon a Time] [arr. G. Pedersen-Helgerod]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa8a3edb59583a66ea8bcb290d23e8e33a75a4cb1e1c62bb4c3259bab13b7ae48. 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/SEAEQ0761090.
4 Psalms, Op. 74: No. 3, Jesus Kristus er opfaren (Jesus Christ Our Lord Is Risen)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x917f7e1399800d5c81dbed3117f4fdaf91051529890c82f614369bf92668d0d9. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), 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/SEAEQ0761110.
4 Psalms, Op. 74: No. 2, Guds Son har gjort mig fri (God's Son hath Set me Free)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f1c8f5b0021c8dbc3448d769c6e63ac5fb89f6cbf591a2f40007ba958daadee. 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/SEAEQ0761120.