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 0x952a0608eadc4da58fab7f03c6106fd0f6ae397158293968fa20a4bc1cc58d8e. Chain 2 (Bitcoin): anchored in block 953710 (2026-06-14T23:32:42Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/7f0fe76b-4637-49e4-a637-d4440139e1fc.json and https://artists.proofprofile.net/proofs/artist/7f0fe76b-4637-49e4-a637-d4440139e1fc.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 0x8341bcd1603e544c282a5aed02bf719c48e2ed7a4cc1e4a6573b7f7a211251b6. 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/DKBCA1504201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd63d03cd34dc2523b918825c5e51cece687bac88c13cccbc9dc6e0ece9b4a46. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DKBCA1504202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6a8a9851b934b50fe36b5b2dbc46b01d581b58065ec23f59c07762c467766de. 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/DKBCA1504203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d4d5224b047b0f3c7ff26c7aa625d3d8cf134afe143b429297a9f4407fd72b2. Chain 2 (Bitcoin): anchored in block 957766 (2026-07-12T22:25:04Z), 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/DKBCA1504204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c98ddef3a1b8397f81646e99c03ed5029bfcd0cee7beed0ede7010b5a75846. 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/DKBCA1504205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x321bf6cf4ac82c0a0cb89c04cd52b4a1fa02bf1fb12139d675c1657c6d8216a9. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), 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/DKBCA1903701.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c4d92fe40abeb661b552e904cc5a00a508b51706da7c22a72ab5fd8fc81b72. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T02:01:41Z), 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/DKBCA1903702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2b84a50692a4a4347169d00b18d498e753b253c21fa1bb1081f06578fb6d132c. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKBCA1903705.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a33eb5011edea7e609c0cf8b5a72b56316d291bbd4c30f4608385243cfdbeb2. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/DKBCA1903708.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2cf4b030704d15d0904f394c66d79bc9111d38306a79192b89ebde25ac56fd4e. 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/DKBCA2401201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19c25411990a0205598f9fc80928438951ca6b4b400e31002df14a0cc3ab358a. Chain 2 (Bitcoin): anchored in block 958563 (2026-07-18T14:29:03Z), 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/DKBCA2401206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe80f5a89f3400933a674a557f01d8a80dd28f7b7559453932974fd9907c2972. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), 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/DKBCA2401203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x81194b77cbc495bc92ec560d7eafe6fc6b85e65f33cba44668bd73a8255166e2. 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/DKBCA2401202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x014666ac8357169066ebe962eba352c0cb36c864b197cb8755913da7f0883b76. Chain 2 (Bitcoin): anchored in block 958830 (2026-07-20T05:30:12Z), 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/DKBCA2401207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc6e9a2866e716db9a05b8a9f0c4d072ab2da13c0e7ad23e7c2b87afa26709728. Chain 2 (Bitcoin): anchored in block 959043 (2026-07-21T18:40:26Z), 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/DKBCA2401208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x300afafa724493b8bd3aba2464d35a856a024d7a9b50e0e94f2e57479f8c8d03. Chain 2 (Bitcoin): anchored in block 959058 (2026-07-21T21:09:36Z), 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/DKBCA2401209.