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 0x6d3f451dd2d09f84eab2ad6301a8ac5030c7af41a6d74540fba4ab502cfe40ee. Chain 2 (Bitcoin): anchored in block 953899 (2026-06-16T06:37:25Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/11f4f2d2-4aa1-470a-8d49-ef36b6dee7cd.json and https://artists.proofprofile.net/proofs/artist/11f4f2d2-4aa1-470a-8d49-ef36b6dee7cd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Choral Concert: YL Male Voice Choir - Mantyjarvi, J. / Pohjannoro, H. / Talvitie, R. / Pulkkis, U. / Yuasa, J. / Karlsson, L. / Bergman, E.
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 0x38756866961ed68029ab60d68ae02a303a59c54392159cdeb900247fae3a8cca. 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/NOJVA9918403.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b4dce16d32f7aac79c1f83f6597513a5c8e1af2f20c2bc7cda746257b5da429. 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/NOJVA9918405.
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 0x409b3d1981f40e3449baa6c38b5cecc6773a07f431ef8408dbbc34e668eef05d. 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/NOJVA9918406.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0b0c0e8291978ff6b576bc5211c35282802220f7f542559d74022e735c65d012. 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/NOJVA9918407.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6ede04b5c991fd71400a32ba15808ca8d7544a71ba44a59c283493547231596b. 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/FIASF0500005.
8 Pièces brèves, Op. 84: V. Improvisation
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c6c5c27c1c74313c085b5b76119e73d352d823dc8e043e67b864ff5e6b4b513. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151644.
Visions fugitives, Op. 22: XX. Lento irrealmente
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf27eb4852f5255ef14c07ed5caad9d952a11018b38b6421d554aaffe6969da. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151647.
6 Little Piano Pieces, Op. 19: VI. Sehr langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x665187c4239dbc680f998cf7306dff48a13b35ba1f5218b2a08b9214040ad6cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151648.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5030b4139c033447ede6a7cef53182b10ad514fbdc050b7511da273402d40f1. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151649.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dfcda6eda3468427bcbf9c3c3bbaeb7766269c7b53b5a5c7bed68a3a42f2147. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151650.
Miroirs, M. 43: V. La vallée des cloches
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7c90ac74535ea8ea83ade8d1bd1aad9f2ab4dad1e464842701997c1756155c6a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151651.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf71b1b0d5da6f2611c10f3448a670d1867a7a21a4b080dbd0822aabec4361793. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151653.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x60c5f40bd6a01ba99d96fef2f25dc06d651078c64f6fb2b63b2a821f12cb8a84. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151654.
6 Little Piano Pieces, Op. 19: II. Langsam
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8fc8dce009eaa9409eb89fa74e28dda5e2fb9c75d3bb1bd17fb27aac584c327a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151656.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3779e038c8888130ee5f04ff21eabefefe2e611f326c4714400a39fddf37a6cb. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151657.
10 Pensées lyriques, Op. 40: V. Berceuse
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x61f2fa2f04abf39842d2199b2e2c54f6fc40b5b0b284e5391f6854af12b60522. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151658.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb58c6149168a11453a0a405b6610e8f3b8d91515ca7cf73e420be67325ecca9b. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151659.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b9c594a53c1e762887fe3abacd55bc2663cdd0aa431e671dbffd9d3927f566e. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/QMFME2151663.