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 0x5633d2a4cff8b3d5c44f389534a5e9c3f2aa6f476648a865dc11f8f117f62351. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/0dfaf812-d3ba-4379-bb4b-03191152a6a8.json and https://artists.proofprofile.net/proofs/artist/0dfaf812-d3ba-4379-bb4b-03191152a6a8.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 0x6a08482659417e5a7d64dbe7752a47a1d2d27d4f0a9cb8fb086cc77c38b88a03. Chain 2 (Bitcoin): anchored in block 958572 (2026-07-18T15:47:37Z), 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/MXUM62300368.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x68518133d0c9125e819f18006507c6ca03aa5575f2933f29070bee29ac138aec. Chain 2 (Bitcoin): anchored in block 958792 (2026-07-20T01:31:42Z), 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/FRX202073232.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdbb01ec8c26c2768b1d48567803e2e061af9a4e35c79cebc1be5a13dfdc64d0c. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/QM8E51400167.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe743b0e9013cc9ff3995eae4aa78aac379763bab50e1221844ef91359eb64db. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/FRX282180511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x091d87e35cd725da5f3551bdef323ac5748232b40d0c7d1b43a27feee741c68c. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:38:56Z), 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/FRX872133837.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed754892cadba9067bffe83d4ba54f4c43489acee5647140ea100a381a5877c3. Chain 2 (Bitcoin): anchored in block 958742 (2026-07-19T16:22:12Z), 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/FRX762256607.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90099097298e67d86282e938f1715be722e5942731e2c44d91d132f2a9a1d116. 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/MXUM62300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x90099097298e67d86282e938f1715be722e5942731e2c44d91d132f2a9a1d116. 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/MXUM62300466.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0e0fcf2fc2492b98aa249435f741d89b949c1b6feee83c086b3bdfe0beed42d. Chain 2 (Bitcoin): anchored in block 956738 (2026-07-05T04:47:21Z), 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/MXUM62300558.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfae43c0ffd818fa5819e46de737ca305d9efa848ae094a802ca2485b9f85bcbe. Chain 2 (Bitcoin): anchored in block 958137 (2026-07-15T12:27:05Z), 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/MXUM62400155.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe62d4bcd912ca73860de436fcb97daef1e284f3ed7174835be38c0675aa8eb6b. 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/MXUM62400303.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x43e21a74de5ca18dbef35e252c5f7e1ad6e9acb0dfe571488186175a89dc1979. 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/MXUM62400334.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x181ed2f16e61e2950749ae04fb0bfe6a4993def8f26fa41ad9efe5f9ee58a9f3. 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/MXUM62500025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x75b8d81c34954b84c74e7a67cf562e66dd091e9c43fad068b74d8a0114765203. 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/MXUM62500081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35a05ce4513d53f8b47ac008535d45b9d92820006e2fc673a502c32469d7dccf. Chain 2 (Bitcoin): anchored in block 958808 (2026-07-20T02:49:15Z), 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/MXUM62500089.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ae846fbfb9b77b65b4a1b98ff4a00f94419b53fdeffb5e05c4d263aec855c0d. Chain 2 (Bitcoin): anchored in block 958690 (2026-07-19T07:14:39Z), 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/MXUM62500106.