The Indische Partij (IP) or Indies Party () was a short-lived but influential political organisation founded in 1912 by the Indo-European (Eurasian) journalist E.F.E. Douwes Dekker and the Javanese ph
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 0x57664b5364dc93e8e4c3a59cef48dfe4ff3f9fd6cc1789651dc627260b83c30a. 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/436aeba4-25ea-4ced-b086-95c05b5b1083.json and https://artists.proofprofile.net/proofs/artist/436aeba4-25ea-4ced-b086-95c05b5b1083.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 0xcda1c3224f4affa7ce42e0b6c7dfcc50a1782cbffd697c3254d31ebacf49694a. 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/FRX762314646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4e91c484cbdc79a0e7095020e3dff2afa09d4054fee4b3fad0c60ca0bd3dd6c. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FRX872380543.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe3f9ab72d8f5a2bdb4e5188d162649151581b15962f5bc66ccf125c21431483d. 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/FRX872380544.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d721bac83cb65d476e71032090b0a1903949f510967c6af44f8941851b6e13. Chain 2 (Bitcoin): anchored in block 956894 (2026-07-06T07:53:57Z), 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/FRX872172527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7d915e50ea16689e83159d42613d72936588d36aa67ed9843e98482bc6d518ae. 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/FRX872380546.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7adca975c30cf5b4c0b2be8f400eabfe46c8dae3715aa2b030b48719e36d86. 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/FRX282128389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2b44f201c2138a7f22f4b62d3a2ec7baae4cd18c6deff68c92ac5499d5efb06. 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/FR96X1676433.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f0998c340ed7fb9d83cc17a640bb9966e50e8bc27d0bf0d10025861d510fc5f. 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/FR96X1676434.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1c21e48b22f13a56b997504850afa584665508f1a6b0354a6c34d7b3054d5ef2. 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/FR96X1676435.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdad2826812ff185852195d6ad854d8ca16a966a985cb7bde6afebf17ebbb6ad8. 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/FR96X1676436.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69a3e3facbe8df7ada827bf17c6b5381694eb807b0258a00a21ca84ef520df65. 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/FR96X1676437.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedf2d761999c35401075779945ffe672940558b21bf5321d07d726a1166ac1a7. 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/FR96X1676438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0d55b7c331eeb9e0d9e3bc986b34edd5dfa332619bc9ca67dbea9fecc6eb64bb. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), 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/FR96X1676440.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cb98f6878bce9c08efc2916bf97746bd0d6b6248ac22b9c9268141e327f37ba. 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/FR96X1676442.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3f0a1711e7901923e726c2a475ba2dce03c06440d113e331be44d12e21646a4a. 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/FI5CK1600863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9fa415abda5705cc16c634339aefafb70bf0d421b4e2c380f009455550ac3ea6. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:01:52Z), 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/FI5CK1600864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x52d483eb1ad201540c925d1cab6921c13f58e79ada2679d52fc46dfa2db76f79. 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/FI5CK1600865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xaaafb8ab5b52446c271e91da8d6581cd40e2cccdeef26763f11971caf0e4c0c0. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), 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/FI5CK1600866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc755ac01e2b183cc3d8727820a51e8ba748d958bea0b8c2f8973097e6fc1d1ff. 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/FI5CK1600867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf4d424a9221d0ad8acc2f1988577a75d991d861fe1def643515e2a6b1c9ea647. 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/FI5CK1600868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc3c9b1d27b0c222bb39594cc9c4e07c5ee49025472406d59369865bab82c6dac. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-17T00:02:47Z), 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/FI5CK1600869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5e46fa2efeab01db1bbc930873e917517d65416473a839a8f8f6109ed8801bcc. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), 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/FI5CK1600972.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcda1c3224f4affa7ce42e0b6c7dfcc50a1782cbffd697c3254d31ebacf49694a. 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/FRX762314646.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb4d721bac83cb65d476e71032090b0a1903949f510967c6af44f8941851b6e13. Chain 2 (Bitcoin): anchored in block 957145 (2026-07-08T08:56:20Z), 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/FRX872172527.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e7adca975c30cf5b4c0b2be8f400eabfe46c8dae3715aa2b030b48719e36d86. 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/FRX282128389.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf03f09bae8cede8f579ac2e872cc9fa1ff89dcdb7f67a151fd4a3418bb0bc57d. 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/FR96X1987529.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f1369f43c44e79d7e0d08f5f70d4e0dd32b96051d91fe4c13fb8c6ad6f2d052. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), 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/UKFT41800782.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b5240a697422e15010dfaca2fc0b2bcd505ff5ccc331d591211c0160c95e6f6. 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/UKFT41800783.