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 0x55e59af5239103a5ff8026ea79c94cdbb86c0ea662e51ed22a02f7dd990f262b. 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/8e5ca751-addf-4b2f-9b2a-66d689fff05d.json and https://artists.proofprofile.net/proofs/artist/8e5ca751-addf-4b2f-9b2a-66d689fff05d.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 0x9d9d13893906dd665c4580565a59d0ea4810a9a7561c31d5ec95f6e38d24524e. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300070.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf2460109d760886893780401af0d4880144d1f95df03bcfd2225dfa2d8f66887. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), 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/BEY902300071.
Pas Toch Op Voor De Grote Boze Wolf - musical De 3 Biggetjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9811ddbc2557d3dd765e1d2b2ed0f57ef8c82858af39f52154df6ed07d1d87cd. 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/BEY902300072.
Vandaag Is Het De Dag - musical De 3 Biggetjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x283f547f49b7288c0eadb4dfcb16b62e9d7e8c255b58b6dd255a975b6cc24450. 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/BEY902300073.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6852db981b9fdea63133263868fc747ce6a335a1b30c8354a6cd65bdb19c173. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300074.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5978fa86178778cd39a2716381db5194d69fc9e21283a32d2585499d830c545. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300075.
Wij Zijn Gibbertjes - musical De 3 Biggetjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b2661ad95487cc06dd90b7af9e44759b0a34fcbbb591e78bcda96e12f37fd63. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300076.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xee08d88c88a1930f51d5e71479c3f2e51b2d45e1c3df791a715c54a2fc1f7ccb. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), 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/BEY902300077.
Het Is Gedaan Met De Biggen - musical De 3 Biggetjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb29e4943ad5d70595c725accae9facca89456f0f12fca1f4edc8a57629399cb6. 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/BEY902300078.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe86a9b0a612c45cec75c4e74dc050f0500d4eee52de8d7d86207881c2c30044a. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300079.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfd6bfbc454e121cfbab39cf6ce30921a32ba18e85c26699f933f2dd5faba9cc5. 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/BEY902300080.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbaf8eb05b1bb6530ee6258df309d6d92cf0529f7acb0a1739b4989c80a2fb49. 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/BEY902300081.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1edae2c031dfba59fcf507764ef4cc9fa1d08107eed1328562999d05872fec4e. 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/BEY902300082.
Huwelijksmedley - musical De 3 Biggetjes
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5f4d467d00835399039958603019da07c4fd0adedeb649431531a0bab5d29175. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300083.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff7303360e1733bceda8572e9b228de8d2b2abf6dcd2f1e03ef18f70c35c55ec. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), 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/BEY902300059.