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 0xd78c36cf449cb460f50c510c3a10b24086a12a56d85640445f2f96820d4db903. 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/a252c74f-6937-490b-b55b-3b74b46bba8d.json and https://artists.proofprofile.net/proofs/artist/a252c74f-6937-490b-b55b-3b74b46bba8d.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 0xd80693d0ce9ad4920e32afe1a8ef0caf695e9e359a54cde5066a7aac9c99a4b7. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/SEUM71400532.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3dedc3f115fc79bab61e3ae90dd639903379411e2f89fa76d68b73f56eaeb8ee. Chain 2 (Bitcoin): anchored in block 959001 (2026-07-21T11:41:42Z), 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/SEUM71400878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5eb075fb594962d8a64ac6d480dcb579981213c599aa42834cf5269f17eba15c. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), 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/SEUM71401875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x35445f9ae9b1e164bd95f8bc0a00eeb7760ff2ec1e591abd80c7315b609f5d30. 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/SEUM71401880.
Kärlekens makt / Lappland till Manhattan
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfb5758130e9a0a9ee4e09fdb50a1f26f1590bf835b6dd7dc1ad4b32aa429b85c. Chain 2 (Bitcoin): anchored in block 958935 (2026-07-20T22:08:19Z), 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/SEUM71600759.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f5a1780e32cf66775deebdcf553da4d0ca06aef0d43c3a8369c352c4fa1a185. Chain 2 (Bitcoin): anchored in block 958349 (2026-07-17T02:28:59Z), 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/SEUM71600219.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a7f920a413eff7b6ccdb42c78cdd7b7a6a190814f4dae7fe5e27b2800c633cb. 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/SEUM71600907.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cae42cd302195201b07b136857ce99f328f16fe8ce84dcda707c030bf4a2f1b. Chain 2 (Bitcoin): anchored in block 958218 (2026-07-16T00:33:33Z), 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/QZFZ22402873.
Låt det ba va (feat. Simon Trabelsi & KERO)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f1e5e4a1e5c1ed1385d4c5a1e0bfa669b43ad9b7eaa2bb88b86b4420ef6d725. 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/SEXTE1901702.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4c06648a075f7a668d69cbf05bf7f8c211d385305c2592e27e9babe6a88cb720. Chain 2 (Bitcoin): anchored in block 958882 (2026-07-20T12:45:27Z), 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/QZFYZ2487600.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf3601034a26bf6094d86bc80a173cbb1fa93892af0447b0859abcfaeb62234f7. Chain 2 (Bitcoin): anchored in block 959034 (2026-07-21T16:34:25Z), 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/QZHNB2461479.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc29353761015f71157e291cfe937e479f2b8a8eb9d80bee9daa35cbff0256a73. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), 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/QZTBF2460971.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb48679b9de8b595035ae206ec6762a4325b9f481d309f493e0f499e8077d6cde. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), 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/SE62M2128929.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f742602bacc9483cb61632b64c35360906e80d15aa711d9aa67f2100b459b61. Chain 2 (Bitcoin): anchored in block 957819 (2026-07-13T07:53:33Z), 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/SE5BU2214904.