Blumfeld () was an indie pop band from Hamburg, Germany, formed by singer and songwriter Jochen Distelmeyer. The name of the band was taken from the main character of the short story "Blumfeld, ein äl
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 0x8a87c7fc14b56424474ab1b6fb6e0bec4585d8084dd9f434801cb46406d40b9c. 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/9f5e5e36-4bac-4970-8446-bf90a00caa4f.json and https://artists.proofprofile.net/proofs/artist/9f5e5e36-4bac-4970-8446-bf90a00caa4f.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 0x385b71c10590bc140fa9ecf368669b926b5db530b3c2946b0ad5d1b9ac8cbfdf. Chain 2 (Bitcoin): anchored in block 959031 (2026-07-21T18:52:38Z), 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/DEDR50600001.
Von der Unmöglichkeit Nein zu sagen, ohne sich umzubringen
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57014b80149f11a6b26239d0d27e4e116ca9a32b757f56616a024906356119a5. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEDR50600002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0accb079070a02dc603bb65b30fe848914bd892c6c93cf4281f2e98cc08511c2. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), 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/DEDR50600005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7da8274f1db7ba796ad6c55d84025db30d4f0b72828895bd85020b836ebc4fdc. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), 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/DEDR50600020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d376bf381d4bde64addb5ecb590521ec936dea3c9a15e0ea957df07ce662455. 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/DEDR50600022.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b1d2bd055e0bdf99d8cb93e80bfbcc1ebb8e3332f81717da82054a346b4e0d. Chain 2 (Bitcoin): anchored in block 958996 (2026-07-21T12:08:17Z), 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/DEDR50600024.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ce0f3ec5a47cbfc51cb64ea35dbb268e274b187355ac31120e74119c88c82db. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEDR50600026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08f3be62c1f7044699ba807a9d7f5378232de326c7642f8f00b0d48d3ce4352e. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEDR50600034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91ce30e8d3473de713589636a638c203fb1e0cf1ead08c8caa2cdcdb00bc1942. 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/DEDR50600035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x39bf250b5af546392b1263a41367948452f499012d9e1f6fc919aee6fe06854a. Chain 2 (Bitcoin): anchored in block 958069 (2026-07-14T21:37:55Z), 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/DEDR50600037.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x537c3daef4c7845f287f01f4ad9161d2e7ecfff61b7701405847b1e3bdf01c27. Chain 2 (Bitcoin): anchored in block 958705 (2026-07-19T08:43:25Z), 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/DEDR50600039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc632384f00548bb2bfd5519f92ae6b46943051e7c0f4c798a576dc425eb35187. Chain 2 (Bitcoin): anchored in block 957747 (2026-07-12T19:35:06Z), 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/DEDR50600040.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f945d86039cd746590473d01ab267839e1d05e64412ccf7f348fe2b0ecbfeef. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T02:01:01Z), 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/DEA610101243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x623749f35293d1acb17ce78fb608233a214f5ba56bc5f9c9d761627a456ec700. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEA610101244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc9fdc5b3a7184f0d58cff92b0ababf69e0b76a47b9ebcf0ecc1e435df9ef6b0. Chain 2 (Bitcoin): anchored in block 958785 (2026-07-19T21:40:06Z), 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/DEA610101245.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f9a73bb81f904a0be133460e82650bc7e1428273e16c1b470cfb9bcfd4869f. Chain 2 (Bitcoin): anchored in block 956857 (2026-07-06T01:26:17Z), 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/DEA610101248.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x91de45aa324548b0cbce4380ec36a4d35c21ec879ef486162301a42900a3a3b1. 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/DEA610101249.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x16faaff056fafc32996e2a57eec5341433da8f3c529ad324169644502a6798b8. Chain 2 (Bitcoin): anchored in block 958601 (2026-07-18T19:27:02Z), 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/DEA610101251.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa783ba8e5cd2dc35b4fde0d07d89eb2be6393cc0e73dc1344b9c8effe2e16321. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEA620300438.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xed83394e49bdcf4199f896a9f592d8722c4eeb2085226e20754d8bbd0293cffd. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), 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/DEA620300443.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa6a5e5ad57c15dff3ff61afd0d52595a21904def5c419ada91d48c7cb3b3c807. 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/DEA620300444.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x646a1cae8016d41309c341288d161752a8f2daba18b4166fbb7ddc1fd30378b9. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:11:07Z), 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/DEA620300445.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3686470c1d204a34ddbf275dda09882ce71ffd709f8bbb68dc904500b2dd2b40. Chain 2 (Bitcoin): anchored in block 958716 (2026-07-19T10:15:55Z), 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/DEA620300447.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa338940aab716e661890b76e5ef08f5fb79d72076d82df56703fdb50d8d653e2. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEA810600257.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2c7d80db47fd54e28430415d29451022f1890700e414fc66e296a405db02be61. Chain 2 (Bitcoin): anchored in block 958074 (2026-07-14T22:45:25Z), 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/DEA810600259.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x348a9b97485c12e7b0296edb40a7a532ce90181c7e650be7ac1307bd53bd2e6a. Chain 2 (Bitcoin): anchored in block 958346 (2026-07-17T03:56:33Z), 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/DEA810600260.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfde2e8f85c18506a0e3c3887c6c834e8e7be10f14a345ed3256c4fe53c301241. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-17T00:08:59Z), 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/DEA810600261.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbcdca0c45c34051226beee9a35270aee3ba210f0ec61cdeeb019e83e03ccc082. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), 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/DEA810600262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x048353f0af18d10a29d911871d7849979d373b2df5d98d0a7270fd302bcf68db. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), 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/DEA810600263.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbef1f2bda9bdb252dc3718d3155d4f673759f871a2cb01d277dffed3c8dfc221. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), 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/DEA810600264.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9ffac8f7906ef2462bc4b1314b492ebc1ff6620ff5fbd022618f06b712beedf0. 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/DEA810600265.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93290e919afaaf219d7675a1aa6390c63f3fea8c857f69f17616fca2b6331227. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), 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/DEA810600266.