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 0xec50a3f098d917e9fc969d50aa5d382a4d24baba4fae0c193258b3a0a2d72e4b. 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/e39284f5-ff2f-4118-be31-1f310db67108.json and https://artists.proofprofile.net/proofs/artist/e39284f5-ff2f-4118-be31-1f310db67108.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
Longlegs (Original Motion Picture Soundtrack)
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 0xbc40dcd23c597530240c435c9e1a43d3eed07241020a7740fee8bfa63ac3c378. Chain 2 (Bitcoin): anchored in block 957835 (2026-07-13T09:48:24Z), 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/USQX92402863.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcef5e501635b568353d2a43da6591c0887ba1dbdaf3dd3c4f5e7a7f7e3cb062c. Chain 2 (Bitcoin): anchored in block 958146 (2026-07-15T10:33:22Z), 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/USQX92402864.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d9894a61e9640c923918756a44ce3b35c810abab10e7e892aa03fde85a76c54. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), 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/USQX92402865.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6240788f0d77f29c7bd2ed0756aeaa25e5edd5dcc9b57c04e4bdc9f1256be144. Chain 2 (Bitcoin): anchored in block 956422 (2026-07-03T01:01:38Z), 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/USQX92402866.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x105fbd6efc903a64fe723e8d38ec17333231bb2aaf51f18e967d2247ad919d24. Chain 2 (Bitcoin): anchored in block 958325 (2026-07-16T23:49:01Z), 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/USQX92402867.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3da17a86770401e8a5fea44204aef6cf0dcf960fa52ea22c59624f62c7e8fcbc. 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/USQX92402868.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x36a05c3ecce4cc3a6579063f8a161175861240c2d2b69cf2bd6d47053ed97b8a. Chain 2 (Bitcoin): anchored in block 956560 (2026-07-03T23:28:02Z), 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/USQX92402869.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b3f6a8e5e414d63d88af65dc427896e95a46fb216358e767fe5fd50f626842a. Chain 2 (Bitcoin): anchored in block 958196 (2026-07-15T22:44:40Z), 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/USQX92402870.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x74ebd73b5a980da5220cf0e10247be75ed3e60fafe9999c2cf658c540a4f3079. Chain 2 (Bitcoin): anchored in block 958523 (2026-07-18T08:54:12Z), 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/USQX92402871.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3d9b2a7aa47222b7eb63175162475571d96b7e41d61cba4ecbbad4ea5a624e9e. Chain 2 (Bitcoin): anchored in block 958544 (2026-07-18T12:14:37Z), 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/USQX92402872.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f04cb745a7975540be48dbc9cab76ad774ed5e0d63167b4c6769e80019c7d9b. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), 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/USQX92402873.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x94fc12b1f1d5e744e6b6587582fab323a72c2cf632fba5a06526b7cf30b1368f. 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/USQX92402874.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xff6f22d82f95b54662da873cce4121f13140db49909dda8d5fea8943fdd9f356. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), 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/USQX92402875.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd47d099adedbaa90adc29516ccd858c48b6e48232382d346d2ba583d4acd7442. 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/USQX92402876.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfcf428a1256aaca69f7faedbf10ff94bb2c3e50c7fed991b74783782d3f3b65e. Chain 2 (Bitcoin): anchored in block 958943 (2026-07-21T00:27:37Z), 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/USQX92402877.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x967f1fb4094153a82a82e3acd08582a26578bcc9dccd5f8e7abce00eebc808a2. Chain 2 (Bitcoin): anchored in block 958901 (2026-07-20T18:01:55Z), 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/USQX92402878.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3a5373223d48059ec0a7475f1083990f18c6475d7e23a7b7219f0a55d5ad4826. Chain 2 (Bitcoin): anchored in block 958286 (2026-07-16T12:43:37Z), 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/USQX92402879.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5131be95f1145e2313e13c9b4442fa3942932a04830c849653bea197de41daa9. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:11:06Z), 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/USQX92402880.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x149ed316222c79be9ba2857b3a3dff96e433a35df00c62e383535c5fc8c78f72. 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/USQX92402881.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bec95000e3ccfccc5b493ae5aa4f52739d2c906dd46d1720d7edc73099f9288. Chain 2 (Bitcoin): anchored in block 958959 (2026-07-21T03:51:22Z), 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/USQX92402882.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xefaf456cfe3993d1f53f6efa7f64e8dcb4fd0a09cc6a4bc183c70f3a300f47a6. 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/USQX92402883.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd32f839b9f9386c9e179e40bc45e7ee22114a053d500f04e6fbe097e7002d697. Chain 2 (Bitcoin): anchored in block 958319 (2026-07-16T23:00:59Z), 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/USQX92402885.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x357b33877a6c074458b690a23dc5d5877496e4082d0f5bf44ad889f1c50b0f5d. Chain 2 (Bitcoin): anchored in block 957899 (2026-07-13T19:36:39Z), 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/USQX92402886.