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 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 0x3f534024c0001dc2c58978a928dd6891550e90587a8a426b0a9a6a38ac8ad58c. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/a641f70e-3d13-4390-bff5-4c8e351e1a49.json and https://artists.proofprofile.net/proofs/artist/a641f70e-3d13-4390-bff5-4c8e351e1a49.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 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 0x995a041a1f0f9987c85e7f9c297d0fd4ad8a6cd1879479c345c3f364d5a95075. 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/ATD751700201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x02732659381374227dfa1351d002ea47b2e227f6790bf08292a5b15a7972eeac. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), 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/ATD751700202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0856429a4568922950050124cc7b10d2e05d8ea5ec9bfef9054e89fc9fd01536. 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/ATD751700204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81f9be3cd2c18ca38a664f9d5ad941b4a31fab76035026a275c3447d2488967f. 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/ATD751700205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5213926019e477e178107766b02e65980dfbcb1b56808a0064cb172b72e76681. 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/ATD751700206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf8a9a94ad36984c698fe25c22f8be45ab8db28451b60638e6d2c3da1af1a2ee1. 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/ATD751700207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9792c5e8d3448f4bd25a023f5b3f2cbd93e1a084d4a3ef1b90a727c22014bc46. 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/ATD751700208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfec3ed41d017d35bc51b06186f76643d819aea04e44954e882520d6e0f4f6eea. 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/ATD751700209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ed3941479dd8bda1d2668f06047c7f64dc091dea959eaab7ae8bc183867bd75. 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/ATD751700210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe00a1f81bd400690be413473f53514de82b19cf59578f43e3e3682bd0917489d. 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/ATD751700211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x632ae3c3472784899b80656e3db10d99f923700bded49b391c6c5ea51305c25a. 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/ATD751700212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x20580156089eea473c2bffafc93aa31172038e2e41cdc17ade276f29f949ab4c. 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/ATD751700214.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaa30d0d5329dcb4bc60b4f5d9cc2dea9f400229319becb27407d247108cf5ee0. Chain 2 (Bitcoin): anchored in block 957210 (2026-07-08T18:28:05Z), 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/ATD751700218.
Iowa [Ein Ausflug nach Amerika (Ungekürzte Lesung)]
Kapitel 1 - Iowa - Ein Ausflug nach Amerika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x27320ecd8297276b452018d82910222ab81f655b7d6bca35ed8c918eb131b9cb. Chain 2 (Bitcoin): anchored in block 958484 (2026-07-18T03:34:53Z), 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/DEXO12423170.
Kapitel 2 - Iowa - Ein Ausflug nach Amerika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x758473d3e70c3682ff149a38e11345e7bf756e11d206f32043932a7d3ac034dc. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEXO12423171.
Kapitel 3 - Iowa - Ein Ausflug nach Amerika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xce5ada8bea4836fe13b3d4c6f59101cc2bdaef486e6f4ac6d33489f201dc7be4. 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/DEXO12423172.
Kapitel 4 - Iowa - Ein Ausflug nach Amerika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe08c6038be0204afc4ea43c5f8e634c45f1a20267104676069fcd29bccae7df5. Chain 2 (Bitcoin): anchored in block 959024 (2026-07-21T15:31:18Z), 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/DEXO12423173.
Kapitel 6 - Iowa - Ein Ausflug nach Amerika
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe5c494363e14724f792ae8f660b6f845f9cc6e8447e3a050c6574158ce253b1. Chain 2 (Bitcoin): anchored in block 959103 (2026-07-22T05:56:21Z), 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/DEXO12423175.