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 0xf6d43c778d3e4e16bcb9cddcf9d16e49187c938aca9fcfc9424fc59837cd6c4d. 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/4e247420-4fd9-41e5-b179-6a3b75351657.json and https://artists.proofprofile.net/proofs/artist/4e247420-4fd9-41e5-b179-6a3b75351657.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 0xaf0534383db422c97beb774b91579b370efabbdfcc0010010cf47244ac3140fd. Chain 2 (Bitcoin): anchored in block 958633 (2026-07-19T00:54:50Z), 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/TCAEG1977767.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x138b96eab4511b5215bd07456bf3ac9f3252049a3b2a3bafce056f74bf1c1a80. Chain 2 (Bitcoin): anchored in block 957891 (2026-07-13T18:21:04Z), 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/TCAFC2055513.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5162b132e737ed8f520e789f65670cb8c15f9e088e37febef57514c818b91919. 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/TCAFW2151833.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6da9d14ba70bc76cdd392f124c430bc07aac90c7b3675b597c7ae4727665a20. Chain 2 (Bitcoin): anchored in block 958324 (2026-07-16T23:18:38Z), 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/TCAFW2151835.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76998236bc52a84b5f470fc393f1c8cbb9040cb4e96f19949c64c993d7557b7b. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), 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/TCAFW2151837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55599a7fa9166cc959243045ecc735f394bfbf780bb07bcbd09ae3ecd816e9a5. 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/TCAFW2151843.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc0b0ab8206d8414db18f584745722c02ebb74692b0e035d89d4a0217a794549a. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/TCAHC2339155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0065b999cc3521b63e30b2a8b8b30824306b06bd563765ac3944d1de88437e7f. Chain 2 (Bitcoin): anchored in block 958668 (2026-07-19T05:16:11Z), 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/TCAHC2339176.
Game Changer (From “First Person Shooter”)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58549138265af77becefbd73c1ef8d7584d5efdd154ed247081fb96ad33a3b22. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), 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/TCAID2493430.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52de8567e277cd999cb4e8673cddd22f56770f0af7eb74c2bc95a02bfe66e3a5. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), 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/QZWDD2483029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd1d385785e449bb8a7ce79f83125e2701154d81d673a5bbbda1f0f19410afb57. 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/QZ5FN2579317.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x72c2d5cd804400b380afc21bd7b8f5420fe11bcb4bfb37a30d50d1c4934afef6. 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/TCAJN2548177.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc4f9706644164843d4d4581d4ff6e721a5f775f6e1afff0c591140cfb56cc55e. Chain 2 (Bitcoin): anchored in block 958157 (2026-07-15T15:58:42Z), 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/TCAJO2521135.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa61b5e91cd99f2a20415427b3e1896e79c0a4fa81b05588fd66b90da19fd0179. Chain 2 (Bitcoin): anchored in block 956349 (2026-07-02T11:34:59Z), 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/GBRKQ2244283.
Songs They Forgot to Write in the 80S: Vol. 1
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe820a5bbc2fd5d45a7e28894b96352ae0510bbcadef731a435e28dbf36ad2ff4. Chain 2 (Bitcoin): anchored in block 960321 (2026-07-30T22:27:30Z), 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/US7VG2578074.
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