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 0x7371f625aacf238d56c73f3c04626a8cac011d3cff10b5b94ba51930609af87f. Chain 2 (Bitcoin): anchored in block 953746 (2026-06-15T05:25:34Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a719cb1c-4a01-4336-91b1-90d8f68b2ce8.json and https://artists.proofprofile.net/proofs/artist/a719cb1c-4a01-4336-91b1-90d8f68b2ce8.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 0x2dd8be1deba362afd9760354a1053438e77e934a0d5a1cfe04668570d6ad3668. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEAEV1213010.
G-mollpolska efter Anders Gustaf Jernberg
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3d3c742721561c603037fbaf00caf4075c5c9acfe857392c540ca6ac82f772d. 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/SEAEV1213020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x618976a18c8e7eb823a86e96ffca0f68253a18a2c83b67d90ddc1e6d9b03c1a2. 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/SEAEV1213030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3b4480a26ca530e63b8912d8d1437f5c9b8c4e9d922c317afffb3d7921bc8a2. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/SEAEV1213040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x063fede49c0b2cfd996d766380db1571de3b9d22b11883349309948787a81b0f. 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/SEAEV1213050.
Brannvinslat fran Torsas (Drinking Song from Torsas)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8282f8f08859408ede637ef52863133e4ccff3fe4a4cfac480440a584dbe313a. 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/SEAEV1213080.
Pigopolskan - Den glomda polskan (the Maid's Polska - The Forgotten Polska)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5851649c5adaa6f2901335a719eef56ac230b88f5b3429706d5531df7a44f5dd. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/SEAEV1213090.
Nar som flickorna de gifta sig (When Young Women Get Married)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84480456e5b04af94f2c1274f388cf60d7b3bcbad281e534050732cb965b06b9. 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/SEAEV1213100.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9226a28e62dd4d0d91813ed2a24f4ad72fd748cca9eed5bacc39c28793ee35ca. 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/SEAEV1213110.
Polska fra Hoffsmyran (Polska from Hoffsmyran)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b9140d3e477ff1de662271e8be2524552bd00ae28153da87778db16ed3527c9. Chain 2 (Bitcoin): anchored in block 960117 (2026-07-29T14:28:24Z), 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/SEAEV1213060.
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
Herr Lager och skon fager (Herr Lager and the Fair One)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbf6b13bfd616bc40b35dc73a436fd37eb210e003effc200144fc2ba93e42293d. 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/SEAEV1213070.
Bredals Nackapolska (Nackapolska After Bredal)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaeff985603e1108831f7fd4ebd32f6a6809b1346133d82d3271d2df6a8f4216b. 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/SEAEV1213120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf969e88397616347792a24ff6dac34dc60da4890fa2963c02e3d67ed8bb472aa. Chain 2 (Bitcoin): anchored in block 960427 (2026-07-31T15:59:18Z), 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/SEAEV1213130.
ABRÉGÉ - folk suite for nyckelharpa and string orchestra, I. Kapten Kapsyl
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x50f13d4c9e070a8b7f8f2ec24d5e600fba54672e1ae58208dbe626d0e3b43680. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/NOMPP1006080.
ABRÉGÉ - folk suite for nyckelharpa and string orchestra, II. Årepolska
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfa66faa7cd37e8776a937d3b82a34a530ee7928e924a9059dbd29274663903ec. 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/NOMPP1006090.
ABRÉGÉ - folk suite for nyckelharpa and string orchestra, V. Bambodansarna
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x213c687a7da43c302403bb82f034728800c2296e652e6bfb81323047a953e7e6. 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/NOMPP1006120.
ABRÉGÉ - folk suite for nyckelharpa and string orchestra, IV. Till Farmor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7b1fa487f7831116c5bcc19088adfd3f83e9e6917a000212e8764857fb72ef66. Chain 2 (Bitcoin): anchored in block 960099 (2026-07-29T11:30:20Z), 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/NOMPP1006110.
ABRÉGÉ - folk suite for nyckelharpa and string orchestra, III. Balkanpolskan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x940b6c8a6a6a7ebb6590f43512e0889c21f62247a6a696855cdfeb073b582407. Chain 2 (Bitcoin): anchored in block 960459 (2026-07-31T20:22:46Z), 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/NOMPP1006100.