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 0xa7a5c4473b485655eb3d235d416ea8a16bfc6155406e1a7c7e05c2f7e20c00e8. 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/804f1cd5-9428-4c70-9a8f-44e9c247d1d9.json and https://artists.proofprofile.net/proofs/artist/804f1cd5-9428-4c70-9a8f-44e9c247d1d9.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 0xc5667d3f366bbeeae0c64e8c5d8943789f58cabb83b3804dc71847c3c8feafa4. Chain 2 (Bitcoin): anchored in block 958924 (2026-07-20T21:36:45Z), 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/DEWC81701002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x97c5e5924a615305f94a012c7b7555b17d98f8531a0367cfe1f7f40e4a55c358. Chain 2 (Bitcoin): anchored in block 958594 (2026-07-18T18:05:01Z), 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/DEWC81701003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x93f13f443dfe1e6dd39963e23015c1042c123ba6db7f4523b22cf16440235137. Chain 2 (Bitcoin): anchored in block 958696 (2026-07-19T07:45:31Z), 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/DEWC81701004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x295a9ec0764d1db107bf3da6da004269702fa5e27ec203178c8440eda2ed2aee. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), 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/DEWC81701005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c302ae541a612d12946bf91a606f53a276d458e27e0c6786aaa0447ac6edfe0. Chain 2 (Bitcoin): anchored in block 958891 (2026-07-20T16:10:34Z), 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/DELJ81881124.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66678c98d38fd79f58667e9950c169606a81e5397392f0f346dae0878020a1ab. 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/DEE861805555.
Ich und deine Freunde (Nirgendwo Session)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a97426fbdb335f94ada4a9fb922df9775f52220dce2214c566ba8cb78e3cb. Chain 2 (Bitcoin): anchored in block 958889 (2026-07-20T16:02:35Z), 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/DEE861902918.
In drei Jahren (feat. Antje Schomaker) [Nirgendwo Session]
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1387442f1d63f31b6e736f62d78106e3c8595678bcbace7df9c4a5783bcf5437. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:43:15Z), 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/DEE861903516.
In drei Jahren (feat. Antje Schomaker) - Nirgendwo Session
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x651292776d53739e9b3a1c165dc99707c3a8ab25c43cef1801ac0d3b160ec680. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), 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/DEE861903518.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x66d99b44d58db5bbb1cc2d27db665e6334b888a7a5633b1a60ecdf7da90b4755. 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/DEE862000106.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36bc7f7852738c852b6bbf9c41a8074502576967a9906e4d2c14789ef1e06fc9. 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/DEE862000107.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a2e5d0017b343133b87e594efd5289be1cae7110b80a32c200866018f9f5c2d. Chain 2 (Bitcoin): anchored in block 958700 (2026-07-19T08:09:50Z), 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/DEE862000109.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x44c526d646550ec684f9161c2d215426a7e80156ebfe2915ede23e9a187c7063. Chain 2 (Bitcoin): anchored in block 958880 (2026-07-20T15:08:47Z), 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/DEE862000111.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x383f92b337767cebaab96d0145c05145e1afecb720a491c6f8818ab1cbfd967a. Chain 2 (Bitcoin): anchored in block 958388 (2026-07-17T09:14:21Z), 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/DEE862000112.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca7a97426fbdb335f94ada4a9fb922df9775f52220dce2214c566ba8cb78e3cb. Chain 2 (Bitcoin): anchored in block 957866 (2026-07-13T14:54:25Z), 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/DEE861902918.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f3031ae1c7dfd832f3fccfdf54a3c0fd64404f56a9fa8b3b123d823eca463ff. Chain 2 (Bitcoin): anchored in block 957872 (2026-07-13T15:39:45Z), 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/DEE862000115.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb3875852ec51a869bf160db8477eff7d71b2216e92d3375d54ed49514ce00f3. 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/DEE862000921.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6128babb5d0f731a08012c4d219d3d75049055f92185a7e40bd035cc95aac42. Chain 2 (Bitcoin): anchored in block 958377 (2026-07-17T06:48:00Z), 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/DEE862200548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b905137a7019ec7d4db90a202711db2ad6a88a0bd892bf8ff7323334b204bc. Chain 2 (Bitcoin): anchored in block 958908 (2026-07-20T18:53:34Z), 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/DEE862201891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8012fa9afec9664769d6dc6c07fac2483e1179b92cc5f3d4d5154ce5ade8bc20. Chain 2 (Bitcoin): anchored in block 958208 (2026-07-16T01:23:29Z), 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/DEE862300189.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd399d4713f45552e8fa5eef53918debdaf2cfeff2c15c04204526758a8e92. 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/DEE862201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5b905137a7019ec7d4db90a202711db2ad6a88a0bd892bf8ff7323334b204bc. Chain 2 (Bitcoin): anchored in block 958410 (2026-07-17T12:18:07Z), 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/DEE862201891.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6768a42faa176990a9d261134315feb41a6ef736702a4da146228379122e61e5. 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/DEE862200141.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8d6cf393d6ce0717193bb86a61ec950776639047237ec59ce33854b38277e06b. Chain 2 (Bitcoin): anchored in block 958122 (2026-07-15T08:02:29Z), 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/DEE862201894.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1ddd399d4713f45552e8fa5eef53918debdaf2cfeff2c15c04204526758a8e92. 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/DEE862201895.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf6128babb5d0f731a08012c4d219d3d75049055f92185a7e40bd035cc95aac42. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T04:00:56Z), 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/DEE862200548.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9f1b2ab6b71bf48ec2878ede3f876f814c10364c2ef50298dbc8f47bdb5ffacc. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T23:11:15Z), 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/DEE862201896.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x930025b1dd791a63077ea2587fc7e044070b43f0795e2afaea69c7b1374062ed. Chain 2 (Bitcoin): anchored in block 958176 (2026-07-15T17:14:36Z), 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/DEE862201897.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xef5d09e1b616d106c0c18d426f97b8272af161f47e4c500edc666bd0f44c3f96. Chain 2 (Bitcoin): anchored in block 958508 (2026-07-18T06:27:01Z), 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/DEE862201898.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7d205b58f3fe1ccfe0435f1c8416ca8bd1767ec2f219252a27de7677e30539. Chain 2 (Bitcoin): anchored in block 958547 (2026-07-18T12:44:05Z), 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/DEE862201901.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb9b5fa6b8334f17cbab32f916e348bf512fdbcc51662e5018b1e0ea1122e6797. Chain 2 (Bitcoin): anchored in block 958612 (2026-07-18T21:29:37Z), 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/DEE862100794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x65148890f8d293a1e216d2a9f55484e76ab09c6a6096be6659e7005adc71d8ef. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), 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/DEE862201903.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x55ad8527839c83211491a3e7b7b2752cf4f46aedb2f5994aec7bf0c0f5916942. 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/DEE862300854.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x792ed196ce1923f29429a46dd6367fb3f3ad2c70eaf4e6df4a4a167fdf8b1521. 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/DEGQ12200099.