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 0x2a8648130908fc4d71296408413e383a848ca784e92ade3771fba259081633e3. Chain 2 (Bitcoin): anchored in block 953621 (2026-06-14T09:42:57Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1ee2fbcc-5222-49d5-a893-71fb86635d39.json and https://artists.proofprofile.net/proofs/artist/1ee2fbcc-5222-49d5-a893-71fb86635d39.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 0x3d277f0fcae7a28c855fc9a8cccfd12533462f74f20e42de16249e0edc467a73. Chain 2 (Bitcoin): anchored in block 957061 (2026-07-07T16:07:00Z), 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/NLY330801856.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7881751299db86a6fedd1fc70f8df5abbc9ed707bf671ad684de3b4047f3b0a0. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY330801857.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36d04d592ca53dd6b394a28b05d8b11a7c40b8c01872564688a3ec19c3e77bad. 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/NLY330801858.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd61fcc317ba97e5de97164dbb2bbbc4ce21ace3a2c9a48b0efb66d7343b551e2. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLY330801859.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd0dd8dd47b4d9db7f3cdce3cc2dc5ee6f9e65e51cffc5898adb9e569291beb5. 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/NLY330801868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5c055507408787af5b003e2dc5c2570f9aeb5526d29fa9d48a1198a604b770d. 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/NLY330801860.
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 0x701dcb8393112fe515f2c014affaa43b5e706084c639ae2e4d5ad400e3f419c3. 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/NLY330801864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf7748e7229932941679e025aefde4d1844d7657f1e9653eebfdfdbbd882a667b. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLY330801867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefc33a91e263daf806f376ff4440cfaff5b94cf36df208e0e587daa8737e66cc. Chain 2 (Bitcoin): anchored in block 960485 (2026-08-01T00:10:46Z), 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/NLY330801870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9dcdda9add511a82a1853428e8d45b9cf34d83cb2bec39e4ae555d50379a1679. Chain 2 (Bitcoin): anchored in block 960418 (2026-07-31T15:20:15Z), 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/NLY330801871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde591301dc70311d307576c0669f3bae111b97d31ee3ca1bdc098584be82f043. 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/NLY330801876.
III. Meine Seel Erhebt Den Herren BWV 10, 1. Coro: Meine Seel Erhebt Den Herren
Holland Boys Choir, Netherlands Bach Collegium
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9055ef293b37fd35adf103ffeb36f4b39adacc9856ee0cc20656dc6552f7c0ab. 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/NLN580537577.
II. Unser Mund Sei Voll Lachens BWV 110, (1) Coro (Solo: Soprano,tenore, Alto, Basso): Unser Mund Sei Voll Lachens
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e3775f2c0938f09d2330abb766243c52ad9a45aa52b550ce6ca8b34756894d7. 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/NLN580537059.
Bach Edition Vol. 14, Cantatas Vol. VII Part: 4
Bach Edition Vol. 8, Cantatas Vol. III Part: 2
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc8453a9ac149dcc41f3ed631301de9943b4f9aa499618530e88ae855074b4fc1. 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/DEY321201001.
Jenkins: Consort Music for Viols in Five Parts
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9d3b773556d26e6e05f81238f7a5faff0e23daddec0212670c96dbd654cb080c. 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/BEC991803003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55e2a2a124414ac518f79e81997af082158423800005bb414575a6b857fc4afd. 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/BEC991803001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef4e03f90bb17b185dc0b2b5acc95f85807b0f5e1fe4c2b38cf5cb516d331899. 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/BEC991803009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe76f7b8def67c6c20ff9ed66bf59fa902d9d141abde6570e84f5afb46f7c477. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/BEC991402202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68d87ef7274d3b5b873440756599e90f9162b5524e39b12a4eec34e1ff3a83e8. Chain 2 (Bitcoin): anchored in block 960455 (2026-07-31T19:53:13Z), 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/BEC991402201.
Bach Edition Vol. 14, Cantatas Vol. VII Part: 1