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 0xaf4f6bd3b01eb0dae29a5da0496e7c097b92539f0bd1062918e6f4664a95f2c8. 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/b09ff3b9-e974-4f16-ba52-7d1ab0dbecb9.json and https://artists.proofprofile.net/proofs/artist/b09ff3b9-e974-4f16-ba52-7d1ab0dbecb9.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Jah Shaka Meets Mad Professor at Ariwa Sounds
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 0x0f2d3f6620d7e30942fbec8f9dfb221dc7d126cf405672e527534c2be3bac715. Chain 2 (Bitcoin): anchored in block 958058 (2026-07-14T20:20:34Z), 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/USA560503008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1574850035c4469cc17cf47a76f442dfe2ec3312bb208501725ab189aa774aef. 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/USA560503009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe975fc888b98970946c6f5d15fa6877afce4ae66c6f615b131ef7b4db84cee2a. Chain 2 (Bitcoin): anchored in block 958480 (2026-07-18T02:58:58Z), 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/USA560503012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x950babf2bf90b90f9a09434e025d34acc0537dc3db8dd84e9d1ae1da9eb2100c. 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/USA560503014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb646b8a9fdcd1da79814d2db0c8f8f55a896b3dabb6d3f3a07f1da44c2f59580. Chain 2 (Bitcoin): anchored in block 958541 (2026-07-18T11:37:54Z), 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/USA560503015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfdb74e9a3d30803cef68a90ce54b6c286a49536cb381d46c9040c52bccea0648. 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/USA560509326.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf01c166f09ce8a3244b657ed7eba08bd5af68103a94308af0fc12824a055f7da. 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/USA560509327.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcf686e614077318a742ce07498cc6c2af357c175e304ad9352e6f64fb005eca9. 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/USA560509328.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5b8b3817ea53395e5866eb4a0242d1bc09216f2c680c3f1487eeec63ecad286. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T21:08:27Z), 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/USA560509331.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeec8ab5a0bcc291a1535a8bd5172a4d927128e4a9aec7cd52e3b546729a23ae7. Chain 2 (Bitcoin): anchored in block 958561 (2026-07-18T14:22:01Z), 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/USA560509334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1d3b55269ec2832a2dbb6072d4a0e31dd8b73dee47728b818163e428a6bd0a8. Chain 2 (Bitcoin): anchored in block 957613 (2026-07-11T21:37:58Z), 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/USA560509335.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9057447739a1ce6eaebbea795c26b8cb7f658d861cda7b1124a203187f35d921. Chain 2 (Bitcoin): anchored in block 958796 (2026-07-20T00:01:46Z), 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/USA560509336.