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 0x4d43a5c81698c96129121d122d39381a34334c785f3f3733d5b68e7c65cec602. Chain 2 (Bitcoin): anchored in block 953408 (2026-06-12T19:28:13Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ed3b7c13-ad8d-4919-9d04-425031f834d1.json and https://artists.proofprofile.net/proofs/artist/ed3b7c13-ad8d-4919-9d04-425031f834d1.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 0xf8baef58195c666166f220420897425f47ca9ca8a8fdcf72fe68055b211a6307. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), 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/NLY6K2000002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xadf6081e69ea8687fa702fc0af505eb7bcf4adf0fa67a4abdd452fb31322117d. 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/NLY6K2100001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xac888e70e06a781e9ff576325867f7e045960c9b1e7fdbf6a9b3627e7ee7dae7. 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/NLY6K2100002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bdce3c25bb82ce9900fafa8ba2c68925ad37b16a652f604af8996cadca2a201. Chain 2 (Bitcoin): anchored in block 959051 (2026-07-21T19:48:03Z), 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/NLY6K2200001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5903f241c7ffe5c6dd34ab68669ba2885a3515b7fe9b9055ca13dda8108ca9b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLY6K2300001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd7a429398455129228e127d9a048b2e6f9140bd762180c83bacddd66f3fd9d9f. Chain 2 (Bitcoin): anchored in block 958489 (2026-07-18T04:13:26Z), 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/NLY6K2300002.
Credo - Mien Bestoan (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x96c6b7653dd7b5e00963fd0f67939239f1dd9923ca23362be511c5ffdd0ceaef. 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/NLY6K2300003.
Doar Bluit Mien Eerappellaand (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9761f76cc2667afc3b38871c442ed3562bd7f105cd25ea3f3a111ff8b1f461a8. Chain 2 (Bitcoin): anchored in block 958662 (2026-07-19T04:43:15Z), 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/NLY6K2300004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d5cb9d3ba03da1ad6da5ccf45ec6531fd0e7fe9a5a7d1a5aa2c7b81031c10aa. Chain 2 (Bitcoin): anchored in block 958980 (2026-07-21T07:04:12Z), 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/NLY6K2300005.
De Hoaven Van Delfziel (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7030fa81371c766121b30d2591ac0cb53002f20323d56cbc2be289282856be. 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/NLY6K2300006.
Wie Schenken Ons Nog Ain In (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd17e9decb9710a97169e3157b9ecdbe27473299d3f41f0c219b8028ebaeca565. 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/NLY6K2300007.
Zalstoe Aaltied Bie Mie Blieven (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc7c15f1bceb429028c1a472cf3183693a4f08f202667803dc9f236fd77c8400. Chain 2 (Bitcoin): anchored in block 958765 (2026-07-19T20:39:13Z), 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/NLY6K2300008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1a66aaae58c18c07c127eaf5b546a1d0672c9387a1d01052bfcb352bdef06e96. Chain 2 (Bitcoin): anchored in block 959107 (2026-07-22T09:04:47Z), 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/NLY6K2300009.
T Zel Weer Veujoar Worden (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6be6bdbe032d0715b0ea722ce99bfe4cd3646049fbb748fd7c3d89910c453eda. Chain 2 (Bitcoin): anchored in block 958985 (2026-07-21T08:39:15Z), 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/NLY6K2300011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbbe7b7e686f5f0ca291a6560ddf15fbbb13a375325b469cb40b3615bd9765cee. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T01:59:09Z), 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/NLY6K2300012.
T Het Nog Nooit Zo Donker West (Live in De Klinker)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x28eb9cbacc13362457aea83e5ca43432a59c67bf3b20698d14e835d8e65d1753. 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/NLY6K2300013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3846ff4239c9f82f0ea9ea85750c36120891b3441828ff6a899dcef6203a39e. Chain 2 (Bitcoin): anchored in block 959105 (2026-07-22T08:33:53Z), 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/NLY6K2300014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1b10da9c8039062c3b7a5081a3021fc54fbb96a89278b89c9048a540fdb93443. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), 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/NLY6K2300015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11bae3ea7f8e630f49c299b56cd0c401566476ce8580c6f026398a270e4c3d45. Chain 2 (Bitcoin): anchored in block 957661 (2026-07-12T05:37:10Z), 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/NLY6K2400001.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x751a5bd811f6cd649e879c84ddb58e60a26cca997c6759e29555188f6f2a1098. Chain 2 (Bitcoin): anchored in block 956397 (2026-07-17T03:17:59Z), 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/NLY6K2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8eb283be04e1f4e546983d7eb93a979e744f17218eb82dfd8543e184b7235. Chain 2 (Bitcoin): anchored in block 957653 (2026-07-12T04:35:02Z), 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/NLY6K2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092effad9b0e610571df0b3481388f4b7ecdf55c1f0d33d37baa7e2d8a8dff6. Chain 2 (Bitcoin): anchored in block 958969 (2026-07-21T04:58:13Z), 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/NLY6K2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b07b91766e942392473dbb3a9067159bd3dbc14bc0ccc1d66f666db16cc97b. 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/NLY6K2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9092effad9b0e610571df0b3481388f4b7ecdf55c1f0d33d37baa7e2d8a8dff6. Chain 2 (Bitcoin): anchored in block 957780 (2026-07-13T00:36:44Z), 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/NLY6K2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4b07b91766e942392473dbb3a9067159bd3dbc14bc0ccc1d66f666db16cc97b. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NLY6K2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b8eb283be04e1f4e546983d7eb93a979e744f17218eb82dfd8543e184b7235. Chain 2 (Bitcoin): anchored in block 957775 (2026-07-13T00:04:23Z), 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/NLY6K2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7920c61e5bd644871622e660ef8d079cdbead1c7924228dfb2d58c6c4e569798. Chain 2 (Bitcoin): anchored in block 957774 (2026-07-12T23:51:20Z), 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/NLY6K2400015.