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 0x5314cd2bced06bf88314abf646c6f13f733469eadbda2d51020aa7762fef59c3. 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/e604a29d-bcd9-4caa-a6f8-5f6f15cc8604.json and https://artists.proofprofile.net/proofs/artist/e604a29d-bcd9-4caa-a6f8-5f6f15cc8604.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 0x44ec7ffebe62bf8fa0381a6f253a3257b237fb395e6cdca8da790af45ea589c9. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), 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/TCAEJ1940238.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c5a3a245a8bb41689fc81d01e1ee0a0f5bd95ba3f13ea1f04c2be598fc638bf. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), 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/TCAEJ1940245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x983af3c082e25e3962046edaaf890519731c3baded35d33cea09286441736b8b. 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/TCAEJ1940247.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96e627b422d1565d63e19b4761b6c249958033a8e68b40adcc2834ddade0fef7. 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/USDY41917582.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda3ac9d309e108a81b16b4987dc85721e98248dfe60e668fedce551545f083ac. 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/USHM22332700.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x83d53d895ba4dfcd5a8563d9af8cad51b52cb82cbf26db06577ef009ef62f298. Chain 2 (Bitcoin): anchored in block 956482 (2026-07-03T10:33:57Z), 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/USHM22332701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5baeed6560257763ee2d14a2557474834dcec24c12bdcdc02f0ae41d259765b. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/USHM22332702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7e70372b0325ef3f9f19aff105c2744fd412c0a2dfe0d5f162dc7b80f880b361. Chain 2 (Bitcoin): anchored in block 958224 (2026-07-16T02:28:43Z), 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/USHM22332703.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0caed3e8bc9b3f1e937d73208c2c7a6a3f03dcf536c68e61f7bb21c9874fdb80. Chain 2 (Bitcoin): anchored in block 958397 (2026-07-17T10:29:45Z), 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/USHM22332705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xec73bba3665d78a03f89baa181d680da2b3fb37b1fe6056959d221626c2a1053. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/USHM22332706.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe825d38df0046a43095fd98c61fd9d3a6fc9b8036d40037ed80c584e951c12bc. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), 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/USHM22332707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd239482ad344fa311816ddbf5ed2edd0f24b3139d8aef5a7f94d0f7468bd0571. 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/USHM22332708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d96316af89b2258ccde2e80c6ca10d5db259a530e1dd05cba92e62b66c7c54d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/USHM22332709.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x54d07e0a6844e7fad678eecb8c6da0a1c7d5cb8be020d7e2b8c433143f45d866. 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/QZPJ32121961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a752eda00ffb22bd502f26bc487104654989c713175132ba9331019afad928d. 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/QZGWX2044887.
Meet Me in the Shade - Kaputtmacher Live-Session
Kaputtmacher Session Compilation, Vol. 1 (Live)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xba9de755927ba54b8fb59f0a23685dea75bc76a3b8b953d164317802fdb9a325. 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/FR10S1734690.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeaf212214c40d8aa915706bb8884b29fb968800828e6d0778fafdb790c964c8a. Chain 2 (Bitcoin): anchored in block 959134 (2026-07-22T13:34:27Z), 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/TCAIS2439035.