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 0xe3961d5b6993989923dfdc90defa0a6c8c7aa680998ce517037102733e7df173. 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/cb03d43d-bb4b-4c3d-9674-8c098700e7bd.json and https://artists.proofprofile.net/proofs/artist/cb03d43d-bb4b-4c3d-9674-8c098700e7bd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Call to You (feat. Little Lisa) [Remixes]
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 0xf076eb8ca5521d97659959042bebee4d83c9e1023c7d1fb6033018d5be0a5aa4. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T17:59:52Z), 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/QZAKB2380276.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa9327d69c9d292753c8e8d6bb8ef8ec150b21d7124b089e3a562b2d8c4341bc3. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), 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/QZAKB2380277.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x183e274b211ed3f789964a98af3baa014278e7ba1dd4a0f44361b6b46499e7cd. Chain 2 (Bitcoin): anchored in block 958371 (2026-07-17T05:45:43Z), 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/QZAKB2380278.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66c415364dabb4a182abec9694d05e61039cb717bbe8f9a7359fbf1b5c2f5fd2. 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/QZAKB2380279.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3705e921d08c1cbe81209e2927e3db65ab91534c89124fbac64ab51fb004956f. Chain 2 (Bitcoin): anchored in block 958104 (2026-07-15T05:34:05Z), 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/QZAKB2380280.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb85b2c79bc68c59000c49112b5fee0af884cb5fcfb529cc7b1bd229bd6b44602. 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/QZAKB2380281.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefcac0bfd6a166337954cb8acc6f70b4291060be00c201bdcc20461eec03b8b7. 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/QZAKB2443842.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd3050a6c99020a20a294bc2634c4030da605c2b30e3fa78e97dc8c0ffc60687. Chain 2 (Bitcoin): anchored in block 958819 (2026-07-20T04:08:24Z), 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/QZAKB2443843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf37e6bcd5cfc108323257c906b7983b2448afbc4f3d3a833b322e26b69d469ef. 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/QZAKB2443844.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78e21aed21f92615fea03b6c78d6c432fd8af2471f196cb596b6642dc7c17879. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-19T22:55:52Z), 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/QZAKB2443845.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4154f54c81e6076474bbee8d131f74fb997b8e2003a3fc6c1d76ffc86dc6c719. Chain 2 (Bitcoin): anchored in block 958857 (2026-07-20T09:45:25Z), 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/QZAKB2443846.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2f4573d125be6aafcf7b7f8d5ab2bba182c86411992bd28cbf88694614404e23. Chain 2 (Bitcoin): anchored in block 958726 (2026-07-19T11:47:20Z), 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/QZAKB2460328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x970dc845e5a24cb7479219f31da32f0dc9e225bb04b7aaab7967a31a743b7949. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZAKB2460330.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4a13bd6d49a23d612b33392fd7352dc9f00ee1a923ea59bc1a524bc3183c1be. 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/QZAKB2462545.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x448036b44675e1c7d2a8b2cc6567525d711a329dda6d8ce28858b0856c4bb929. Chain 2 (Bitcoin): anchored in block 958428 (2026-07-17T15:15:14Z), 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/QZAKB2462546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x15c885dab91b53f2a6f6a2520960e606580f7a533b4cb2602c108250013d65a1. Chain 2 (Bitcoin): anchored in block 958631 (2026-07-19T00:50:09Z), 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/QZAKB2462547.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x085f6b6d4ba278933ba256c2497d2ce020a670931369d50e0eb2be6e092e75cf. Chain 2 (Bitcoin): anchored in block 959037 (2026-07-21T16:59:47Z), 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/QZAKB2464975.