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 0x62de42584daa85c0bfa5fad98c9f868eb1597287a7b8718523db10ab9c1cf09c. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/857e2911-8774-4f32-8aff-34dc3224d833.json and https://artists.proofprofile.net/proofs/artist/857e2911-8774-4f32-8aff-34dc3224d833.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 0x07f552b5008e98d5498bb682f6fad3a1fa96ce2f0c129a26dc035d4c04752bb4. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/TCAGZ2368513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa356c3221cee0d3e41b24d995bbe0a870fe730ab2d4dc8d24ce44dbc61b0a5f7. Chain 2 (Bitcoin): anchored in block 958363 (2026-07-17T04:34:46Z), 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/TCAGZ2372039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4b19595cc277e08a87f20aaee3a193e9e58bb04c05da0b6467f273fe644575bb. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/TCAHB2337698.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x088211b55309534d1ecea3b7a4432cc33aaaaf893c79277fe2a7901f597b5ec0. Chain 2 (Bitcoin): anchored in block 958228 (2026-07-16T05:39:09Z), 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/TCAHB2337684.
Zu Zweit,Pt.1 (Lelo Remix) [Short Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x48e40ee324fae41a2d688f08f55560c7df530037f495d4b4f14aea9c824c9335. Chain 2 (Bitcoin): anchored in block 958271 (2026-07-16T09:16:54Z), 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/TCAHB2370290.
Zu Zweit, Pt. 2 (Remix 5) [Short Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70bc884f9a906d90b26adae2f346c3f9f8e50fe2866cb074d5d9eee8fce0cf3e. Chain 2 (Bitcoin): anchored in block 958170 (2026-07-15T18:56:17Z), 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/TCAHB2370318.
Zu Zweit, Pt.2 (Remix 3) [Short Version]
Zu Zweit, Pt.2 (Remix 3) [Piano Version]
Zu Zweit, Pt. 2 (Remix) [Long Version 3]
Zu Zweit, Pt. 2 (Remix) [Long Version 2]
Zu Zweit, Pt.2 (Remix 3) [Long Version 3]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf94a9d9e3c24246c136d6d0f22c93b5494b704f5c52b69e7355933904ba3b1c. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/TCAHA2305297.
Zu Zweit, Pt. 2 (Remix 2) [Long Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe95ce953254e2e4a1a7f6dd9db7e4461e4f00bc3dd3d57290616df9a735a05e3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/TCAHA2382996.
Ein Besserer Tag (Remix 2) [ShortVersion]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x377305d47f572eed6eb3edb53ca235d3897243588cbb1d6c7ee6b14b9b04d0f7. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T19:19:51Z), 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/TCAHR2354259.
Broken / Zu Zweit (Remix 3) [Long Version]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a575173683b1622ade6c64cf5ef2265a5aad7aa09bedde2d11cd63f6804bebd. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-15T22:40:25Z), 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/QZAKB2456034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x09e72673fc160b77968ac3b9f326d6e97ecb6799982de65c3095fba9be4cc002. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), 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/QZAKB2456052.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x84830dbf31d096be8ce34dcabfbbc93b76d42ba36fba1162e495deebef75981b. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/QZAKB2459907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd35b9fc1003bffb751f06033d53cb6f7841fe267fd1eafc2c5d5ee569501d6ee. Chain 2 (Bitcoin): anchored in block 958461 (2026-07-17T23:18:11Z), 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/QZAKB2459871.