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 0xd536735df925e60c4dfc5b108380df6edad3754ed0dbb7de16486cec1e647dff. 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/5a279116-f185-4be7-98de-57fd3a6293cc.json and https://artists.proofprofile.net/proofs/artist/5a279116-f185-4be7-98de-57fd3a6293cc.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 0x3c88e84edb9a5dc05f2dd8727e20a11f5c5675a7726842e2d08428f0f9388cda. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T08:58:45Z), 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/SEVGT1501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9e96f3b713fa500ac9d4ee022a1ca6674265186c3402315467663ccd0d5380. Chain 2 (Bitcoin): anchored in block 956476 (2026-07-03T09:04:44Z), 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/SEVGT0602416.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6202482ba2012082825e2f4b9cf495464b8805c853ff32644bc1b77de12df57d. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVGT0604405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7aa6e90a1e5247a4973c34d9c2e03e1de90b8a5701207f3fa5844f6c82abaf. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), 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/SEVGT0403511.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5b9e96f3b713fa500ac9d4ee022a1ca6674265186c3402315467663ccd0d5380. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEVGT0602416.
Barnparty - dans och leklåtar för alla barn
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66df9ed01b0d202aef1e6769a5dc8cb0298c109924b99f0a18f6bc43692b6600. Chain 2 (Bitcoin): anchored in block 956351 (2026-07-02T11:38:34Z), 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/SEVGT1702211.
Barnplaneten - Alice Tegnérs älskade barnvisor
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6202482ba2012082825e2f4b9cf495464b8805c853ff32644bc1b77de12df57d. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), 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/SEVGT0604405.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55555edbe1aacf359df2c08559ab284ee25b25f983371bae440f8f1d0e39e229. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), 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/SEVGT0701009.
Barnplaneten - Populära barnvisor, älskad barnmusik
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3e7aa6e90a1e5247a4973c34d9c2e03e1de90b8a5701207f3fa5844f6c82abaf. 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/SEVGT0403511.