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 0xc3b63fffd08d0ce9f0804e6b1ed4e3e410129cd2ca68e94a76dd471d5aa6627e. 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/cf3c71ee-a759-4b8e-944c-d455e643961c.json and https://artists.proofprofile.net/proofs/artist/cf3c71ee-a759-4b8e-944c-d455e643961c.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 0xa43a2369b0bc63a143960586f95b45a23b8acd489d3767ed80ac42af787bd389. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/FR96X1857989.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf26f346674925b95c2729cd466abb3ebb4c48d24f4c8ba1ac5f447a97753af19. 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/NL1GH1900015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbea83aeffd4eb94686322970e2c6eccd7df593bf1a6d111021f59e4215db337a. 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/NL1GH1900016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41710edb7faa88c6f7ba9f1f9612b1bb271d617a12b7a9cafd7d4342ff083954. 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/NLTH62000040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2a18251e428d7f981cc3f41f06bc47ce642f1a892b5f6d33be36caac5d2e9f2c. Chain 2 (Bitcoin): anchored in block 958839 (2026-07-20T07:01:59Z), 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/NLTH62000041.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6f8728c4389301d98e6e01cb4af18ea13dfb7ca94dd3e4e9ac040b9b8f4e3509. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:21:38Z), 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/NLTH62000042.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd2e89c880c183fd79a7df75e9c031684cbaff02bf8570a793d9350db254cfd12. Chain 2 (Bitcoin): anchored in block 958455 (2026-07-17T21:28:36Z), 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/NLTH62000048.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe1b73cdd8e1821f767a92e4e457964dde74f81b820b9cf8cc7d852036e23157c. 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/NLTH62100029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69545765e144b2cc68900a9fbb496564f1fc27f8a228b49586e5fc884aba4a8d. Chain 2 (Bitcoin): anchored in block 956656 (2026-07-04T14:03:39Z), 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/QMB622313201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4221fc9d70949a2998e7f8bb3d54fdb690567e9a7b7cf1837948335b45cc6847. Chain 2 (Bitcoin): anchored in block 958611 (2026-07-18T21:24:44Z), 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/QMB622313206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39f5d5cbf55bcfeb68a1a1983c276ede7a2ac49b5f5d5672abea0df23299adfb. Chain 2 (Bitcoin): anchored in block 956637 (2026-07-04T10:56:23Z), 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/QMB622313209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x53f9449e74c5dbc99cc28b8af5e560db617b4ecb7caeb5d4f79a1656f20cb73b. 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/NL7EP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x392113e8020440b4d1db7d754306635d19bb548cfdc43332212656f44c68ebce. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:42:17Z), 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/NL7EP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a4cace587d667ea9856d046321d1170d8d94945f971c8b09ae27596cff2d474. Chain 2 (Bitcoin): anchored in block 958169 (2026-07-15T16:16:18Z), 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/NL7EP2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x88a67788e24a1ecdeee91585e4e0cd5182566039efe0491cb4cad81cc2b92a50. Chain 2 (Bitcoin): anchored in block 958444 (2026-07-17T19:12:23Z), 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/NL7EP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd5c18b91b93021f8206b8fcee044d65b097052fe49b980e1a92ffc7dacb19fab. Chain 2 (Bitcoin): anchored in block 958211 (2026-07-16T00:41:04Z), 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/NL7EP2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2362f4732d675282a3613704fe4dac2fd44cfd19c7355d9d1417d5b403f03ae. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-17T00:04:00Z), 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/NL7EP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbd939f5175f241d4aca414577159bd6e403ec96d0de392013b9855a7a53faef6. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T20:03:16Z), 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/NL7EP2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x811166d7fdd49dacfad498a559a14dce1592f6f17829127204d179013ed1b485. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), 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/NLZ8C2300776.
Dekmantel Ten: A Decade of Dekmantel Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6d07bef5c4c21d6a063c989765e2dd78e05c37b09c2071131dbef0446576d408. Chain 2 (Bitcoin): anchored in block 957124 (2026-07-08T03:53:27Z), 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/NLTH62400127.